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Bermúdez de Castro JM, Martínez de Pinillos M, Martín-Francés L, Modesto-Mata M, García-Campos C, Arsuaga JL, Martinón-Torres M. Dental remains of the Middle Pleistocene hominins from the Sima de los Huesos site (Sierra de Atapuerca, Spain): Maxillary dentition. Anat Rec (Hoboken) 2024; 307:2325-2342. [PMID: 34866354 DOI: 10.1002/ar.24841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/12/2021] [Accepted: 11/04/2021] [Indexed: 11/09/2022]
Abstract
The Middle Pleistocene site of the Sima de los Huesos (Sierra de Atapuerca, northern Spain) has yielded a considerable number of human fossils during the period 1984-2020. Among them, up to 253 maxillary teeth have been recovered. In this article, we present the description of the eight dental classes of the maxilla following the Arizona State University Dental Anthropology System classification. In addition, we present the mean mesiodistal and buccolingual diameters of these teeth compared to those of Neanderthals and a modern human sample. The morphology of both the anterior and posterior teeth suggests a close relationship of the Sima de los Huesos hominins with the populations of the second half of the Middle Pleistocene of Europe and the Near East, as well as with the so-called classic Neanderthals of Europe. Features with a recognizable taxonomic signal allow grouping the Sima de los Huesos hominins with different paleodemes into a Neanderthal clade. The dental evidence of the Sima de los Huesos hominins is key to suggest a complex model for the settlement of Europe during the Middle Pleistocene. During this period, different migrations of human groups probably coming from Southwest Asia, replacements, prolonged isolations, as well as hybridization and introgression processes would have contributed to the diversity of hominins in Europe.
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Affiliation(s)
- José María Bermúdez de Castro
- Department of Paleobiology, Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
- Anthropology Department, University College London, London, UK
| | - Marina Martínez de Pinillos
- Department of Paleobiology, Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
| | - Laura Martín-Francés
- Department of Paleobiology, Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
- Anthropology Department, University College London, London, UK
- Fundación Atapuerca, Carretera de Logroño 44, Ibeas de Juarros, Burgos, 09198, Spain
| | - Mario Modesto-Mata
- Equipo Primeros Pobladores de Extremadura, Casa de la Cultura Rodríguez Moñino, Cáceres, Spain
| | - Cecilia García-Campos
- Department of Paleobiology, Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
- Fundación Atapuerca, Carretera de Logroño 44, Ibeas de Juarros, Burgos, 09198, Spain
| | - Juan Luis Arsuaga
- Centro Mixto UCM-ISCIII de Evolución y Comportamiento Humanos, Instituto de Salud Carlos III, Madrid, Spain
- Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain
| | - María Martinón-Torres
- Department of Paleobiology, Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
- Anthropology Department, University College London, London, UK
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Bermúdez de Castro JM, Martínez de Pinillos M, Martín-Francés L, Modesto-Mata M, García-Campos C, Arsuaga JL, Martinón-Torres M. Dental remains of the Middle Pleistocene hominins from the Sima de los Huesos site (Sierra de Atapuerca, Spain): Mandibular dentition. Anat Rec (Hoboken) 2024; 307:2394-2409. [PMID: 34851548 DOI: 10.1002/ar.24840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/17/2021] [Accepted: 11/04/2021] [Indexed: 11/08/2022]
Abstract
The Middle Pleistocene site of the Sima de los Huesos (Sierra de Atapuerca, northern Spain) has yielded a considerable number of human fossils during the period 1984-2020. Among them, up to 314 mandibular teeth have been identified. In this second paper dedicated to the dentition we present the description of the eight dental classes of the mandible following the Arizona State University Dental Anthropology System (ASUDAS) classification. In addition, we show the mean mesiodistal and buccolingual diameters obtained in these teeth compared to those of Neanderthals and a modern human sample. The morphology of both the anterior and posterior teeth suggests a close relationship of the Sima de los Huesos hominins with the populations of the second half of the Middle Pleistocene of Europe and the Near East, as well as with the so-called classic Neanderthals of Europe. The combination of dental traits in these populations is characteristic and diagnostic and suggests grouping the Sima de los Huesos hominins with the other paleodemes in a Neanderthal clade. The dental evidence of the Sima de los Huesos hominins is key to propose a complex model for the settlement of Europe during the Middle Pleistocene. In this period, different migrations of human groups probably coming from Southwest Asia, replacements, prolonged isolations, as well as hybridization and introgression processes would have contributed to the diversity of hominins in Europe.
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Affiliation(s)
- José María Bermúdez de Castro
- CENIEH (Centro Nacional de Investigación sobre la Evolución Humana), Burgos, Spain
- Anthropology Department, University College London, London, UK
| | | | - Laura Martín-Francés
- CENIEH (Centro Nacional de Investigación sobre la Evolución Humana), Burgos, Spain
- Anthropology Department, University College London, London, UK
- Fundación Atapuerca, Burgos, Spain
| | - Mario Modesto-Mata
- Equipo Primeros Pobladores de Extremadura, Casa de la Cultura Rodríguez Moñino, Cáceres, Spain
| | - Cecilia García-Campos
- CENIEH (Centro Nacional de Investigación sobre la Evolución Humana), Burgos, Spain
- Fundación Atapuerca, Burgos, Spain
| | - Juan Luis Arsuaga
- Centro Mixto UCM-ISCIII de Evolución y Comportamiento Humanos, Instituto de Salud Carlos III, Madrid, Spain
- Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Madrid, Spain
| | - María Martinón-Torres
- CENIEH (Centro Nacional de Investigación sobre la Evolución Humana), Burgos, Spain
- Anthropology Department, University College London, London, UK
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Šimková PG, Wurm L, Fornai C, Krenn VA, Weber GW. Shape variation in modern human upper premolars. PLoS One 2024; 19:e0301482. [PMID: 38593117 PMCID: PMC11003632 DOI: 10.1371/journal.pone.0301482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 03/16/2024] [Indexed: 04/11/2024] Open
Abstract
Morphological variation in modern human dentition is still an open field of study. The understanding of dental shape and metrics is relevant for the advancement of human biology and evolution and is thus of interest in the fields of dental anthropology, as well as human anatomy and medicine. Of concern is also the variation of the inner aspects of the crown which can be investigated using the tools and methods of virtual anthropology. In this study, we explored inter- and intra-population morphometric variation of modern humans' upper third and fourth premolars (P3s and P4s, respectively) considering both the inner and outer aspects of the crown, and discrete traits. We worked by means of geometric morphometrics on 3D image data from a geographically balanced sample of human populations from five continents, to analyse the shape of the dentinal crown, and the crown outline in 78 P3s and 76 P4s from 85 individuals. For the study of dental traits, we referred to the Arizona State University Dental Anthropology System integrated with more recent classification systems. The 3D shape variation of upper premolar crowns varied between short and mesio-distally broad, and tall and mesio-distally narrow. The observed shape variation was independent from the geographical origin of the populations, and resulted in extensive overlap. We noted a high pairwise correlation (r1 = 0.83) between upper P3s and P4s. We did not find any significant geographic differences in the analysed non-metric traits. Our outcomes thus suggest that geographical provenance does not play a determinant role in the shaping of the dental crown, whose genesis is under strict genetic control.
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Affiliation(s)
- Petra G. Šimková
- Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria
- Human Evolution and Archaeological Sciences HEAS, University of Vienna, Vienna, Austria
| | - Lisa Wurm
- Medical Technology Cluster, Business Upper Austria–OÖ Wirtschaftsagentur GmbH, Linz, Austria
| | - Cinzia Fornai
- Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria
- Human Evolution and Archaeological Sciences HEAS, University of Vienna, Vienna, Austria
- Department of Research in Occlusion Medicine, Vienna School of Interdisciplinary Dentistry–VieSID, Klosterneuburg, Austria
- Center for Clinical Research, University Clinic of Dentistry Vienna, Medical University of Vienna, Vienna, Austria
- Institute of Evolutionary Medicine, University of Zurich, Zürich, Switzerland
| | - Viktoria A. Krenn
- Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria
- Institute of Evolutionary Medicine, University of Zurich, Zürich, Switzerland
- Fraunhofer Austria Research GmbH, Graz, Austria
| | - Gerhard W. Weber
- Department of Evolutionary Anthropology, University of Vienna, Vienna, Austria
- Human Evolution and Archaeological Sciences HEAS, University of Vienna, Vienna, Austria
- Core Facility for Micro-Computed Tomography, University of Vienna, Vienna, Austria
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Popovici M, Groza VM, Bejenaru L, Petraru OM. Dental morphological variation in Chalcolithic and Bronze Age human populations from North-Eastern Romania. Ann Anat 2023; 245:152015. [DOI: 10.1016/j.aanat.2022.152015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 09/06/2022] [Accepted: 10/04/2022] [Indexed: 11/07/2022]
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Roksandic M, Radović P, Lindal J, Mihailović D. Early Neanderthals in contact: The Chibanian (Middle Pleistocene) hominin dentition from Velika Balanica Cave, Southern Serbia. J Hum Evol 2022; 166:103175. [PMID: 35339947 DOI: 10.1016/j.jhevol.2022.103175] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 02/16/2022] [Accepted: 02/16/2022] [Indexed: 12/26/2022]
Abstract
Neanderthals are Eurasian fossil hominins whose distinctive morphology developed in the southwestern corner of Europe and later spread throughout the continent, reaching Southwest Asia before the Late Pleistocene and spreading into Central Asia by 59-49 ka. The timing, tempo, and route of the Neanderthal movements eastward are poorly documented. The earliest probable evidence of Neanderthals in Asia comes from Karain E Cave (Anatolia, Turkey), dated to 250-200 ka. We present four Chibanian (Middle Pleistocene) hominin specimens, representing at least two individuals, from Velika Balanica Cave (Serbia): a permanent upper third molar (BH-2), a deciduous upper fourth premolar (BH-3) refitted to a poorly preserved maxillary fragment with the permanent first molar in the alveolus (BH-4), and a permanent upper central incisor (BH-5). We provide descriptions of the teeth, as well as a comparative analysis of the well-preserved M1 (BH-4), including assessments of cusp angles, relative occlusal polygon area, relative cusp base areas, two- and three-dimensional enamel thickness, and taurodontism. Morphology of both the occlusal surface and the enamel dentine junction of the M1 indicates that the maxillary fragment and associated dP4 belonged to an early Neanderthal child. The heavily worn I1 and M3 are consistent with the Neanderthal morphology, although they are less distinct taxonomically. These Chibanian remains with provenance from layer 3a are constrained by two thermoluminescence dates: 285 ± 34 ka and 295 ± 74 ka. They represent the earliest current evidence of Neanderthal spread into the Eastern Mediterranean Area. We discuss these findings in light of recent direct evidence for cultural connections between Southwestern Asia and Southeast Europe in the Chibanian.
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Affiliation(s)
- Mirjana Roksandic
- Department of Anthropology, University of Winnipeg, 515 Portage Avenue, Winnipeg, MB, R3B 2E9, Canada; Department of Anthropology, University of Manitoba, 432 Fletcher Argue Building, 15 Chancellor Circle, Winnipeg, MB, R3T 2N2, Canada; Fellow, DFG Center for Advanced Studies 'Words, Bones, Genes, Tools', University of Tübingen, 23 Rümelinstrasse, Room 603a, Tübingen, Germany.
| | - Predrag Radović
- Department of Archaeology, Faculty of Philosophy, University of Belgrade, 18-20 Čika Ljubina Belgrade, 11000, Serbia; National Museum Kraljevo, 2 Trg Svetog Save, Kraljevo, 36000, Serbia
| | - Joshua Lindal
- Department of Anthropology, University of Manitoba, 432 Fletcher Argue Building, 15 Chancellor Circle, Winnipeg, MB, R3T 2N2, Canada
| | - Dušan Mihailović
- Department of Archaeology, Faculty of Philosophy, University of Belgrade, 18-20 Čika Ljubina Belgrade, 11000, Serbia
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Mian M, Tan J, Yong R, Williams R, Labrinidis A, Anderson PJ, Ranjitkar S. Craniofacial Phenomics: Three-Dimensional Assessment of the Size and Shape of Cranial and Dentofacial Structures. Methods Mol Biol 2022; 2403:107-127. [PMID: 34913120 DOI: 10.1007/978-1-0716-1847-9_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Craniofacial phenomics has opened up numerous opportunities to correlate genetic and epigenetic factors to craniofacial phenotypes in order to improve our understanding of growth and development in health and disease. Three-dimensional (3D) imaging has played a key role in advancing craniofacial phenomics by facilitating highly sensitive and specific characterizations of craniofacial and dental morphology. Here we describe the use of micro-computed tomography (micro-CT) to image the murine craniofacial complex, followed by surface reconstruction for traditional morphometric analyses. We also describe the application of geometric morphometrics, based on Generalized Procrustes Analysis, for use in human premolars. These principles are interchangeable between various vertebrate species, and between various surface imaging techniques (including micro-CT and 3D surface scanners), offering a high level of versatility and precision for extensive phenotyping of the entire craniofacial complex.
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Affiliation(s)
- Mustafa Mian
- Adelaide Dental School, The University of Adelaide, Adelaide, SA, Australia
| | - Jenny Tan
- Adelaide Dental School, The University of Adelaide, Adelaide, SA, Australia
| | - Robin Yong
- Adelaide Dental School, The University of Adelaide, Adelaide, SA, Australia
| | - Ruth Williams
- Adelaide Microscopy, The University of Adelaide, Adelaide, SA, Australia
| | - Agatha Labrinidis
- Adelaide Microscopy, The University of Adelaide, Adelaide, SA, Australia
| | - Peter J Anderson
- Adelaide Dental School, The University of Adelaide, Adelaide, SA, Australia
- Australian Craniofacial Unit, Women's and Children's Hospital, North Adelaide, SA, Australia
- South Australian Health and Medical Research Institute (SAHMRI), Adelaide, SA, Australia
| | - Sarbin Ranjitkar
- Adelaide Dental School, The University of Adelaide, Adelaide, SA, Australia.
- Department of Dentistry and Oral Health, La Trobe Rural Health School, La Trobe University, Bendigo, VIC, Australia.
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Comparative dental study between Homo antecessor and Chinese Homo erectus: Nonmetric features and geometric morphometrics. J Hum Evol 2021; 161:103087. [PMID: 34742110 DOI: 10.1016/j.jhevol.2021.103087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 09/13/2021] [Accepted: 09/18/2021] [Indexed: 11/24/2022]
Abstract
The Chinese Middle Pleistocene fossils from Hexian, Xichuan, Yiyuan, and Zhoukoudian have been generally classified as Homo erectus s.s. These hominins share some primitive features with other Homo specimens, but they also display unique cranial and dental traits. Thus, the Chinese Middle Pleistocene hominins share with other European and Asian hominin populations the so-called 'Eurasian dental pattern'. The late Early Pleistocene hominins from Gran Dolina-TD6.2 (Spain), representing the species Homo antecessor, also exhibit the Eurasian dental pattern, which may suggest common roots. To assess phylogenetic affinities of these two taxa, we evaluated and compared nonmetric and metric dental features and interpreted morphological differences within a comparative hominin framework. We determined that the robust roots of the molars, the shelf-like protostylid, the dendrite-like pattern of the enamel-dentine junction surface of the upper fourth premolars and molars, the strongly folded dentine of the labial surface of the upper incisors, and the rare occurrence of a mid-trigonid crest in the lower molars, are all characteristic of Chinese H. erectus. With regard to H. antecessor, we observed the consistent expression of a continuous mid-trigonid crest, the absence of a cingulum in the upper canines, a complex root pattern of the lower premolars, and a rhomboidal occlusal contour and occlusal polygon and protrusion in the external outline of a large a bulging hypocone in the first and second upper molars. Using two-dimensional geometric morphometrics, we further demonstrated that H. antecessor falls outside the range of variation of Chinese H. erectus for occlusal crown outline shape, the orientation of occlusal grooves, and relative locations of anterior and posterior foveae in the P4s, P3s, M1s, M2s, and M2s. Given their geographic and temporal separation, the differences between these two species suggest their divergence occurred at some point in the Early Pleistocene, and thereafter they followed different evolutionary paths.
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Grine FE, Gonzalvo E, Rossouw L, Holt S, Black W, Braga J. Variation in Middle Stone Age mandibular molar enamel-dentine junction topography at Klasies River Main Site assessed by diffeomorphic surface matching. J Hum Evol 2021; 161:103079. [PMID: 34739985 DOI: 10.1016/j.jhevol.2021.103079] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 09/07/2021] [Accepted: 09/12/2021] [Indexed: 11/19/2022]
Abstract
The morphology and variability of the Middle Stone Age (MSA) hominin fossils from Klasies River Main Site have been the focus of investigation for more than four decades. The mandibular remains have figured prominently in discussions relating to robusticity, size dimorphism, and symphyseal morphology. Variation in corpus size between the robust SAM-AP 6223 and the diminutive SAM-AP 6225 mandibles is particularly impressive, and the difference between the buccolingual diameters of their M2s significantly exceeds recent human sample variation. SAM-AP 6223 and SAM-AP 6225 are the only Klasies specimens with homologous teeth (M2 and M3) that permit comparisons of crown morphology. While the differences in dental trait expression at the outer enamel surfaces of these molars are slight, diffeomorphic surface analyses of their underlying enamel-dentine junction (EDJ) topographies reveal differences that are well beyond the means of pairwise differences among comparative samples of Later Stone Age (LSA) Khoesan and recent African homologues. The EDJs of both SAM-AP 6225 molars and the SAM-AP 6223 M3 fall outside the envelopes that define the morphospace of these two samples. Although the radiocarbon dated LSA individuals examined here differ by a maximum of some 7000 years, and the two Klasies jaws may differ by perhaps as much as 18,000 years, it is difficult to ascribe their differences to time alone. With reference to the morphoscopic traits by which the SAM-AP 6223 and SAM-AP 6225 EDJs differ, the most striking is the expression of the protoconid cingulum. This is very weakly developed on the SAM-AP 6223 molars and distinct in SAM-AP 6225. As such, this diminutive fossil exhibits a more pronounced manifestation of what is likely a plesiomorphic feature, thus adding to the morphological mosaicism that is evident in the Klasies hominin assemblage. Several possible explanations for the variation and mosaicism in this MSA sample are discussed.
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Affiliation(s)
- Frederick E Grine
- Department of Anthropology, Stony Brook University, Stony Brook, NY 11794-4364, USA; Department of Anatomical Sciences, Stony Brook University, Stony Brook, NY 11794-4364, USA.
| | - Elsa Gonzalvo
- Centre d'Anthropobiologie et de Génomique de Toulouse, Université Paul Sabatier Toulouse III, Faculté de Médecine Purpan, 37 Allées Jules Guesde, Toulouse, France
| | - Lloyd Rossouw
- Florisbad Quaternary Research Department, The National Museum, 36 Aliwal Street, Bloemfontein 9300, South Africa
| | - Sharon Holt
- Florisbad Quaternary Research Department, The National Museum, 36 Aliwal Street, Bloemfontein 9300, South Africa
| | - Wendy Black
- Archaeology Unit, Research and Exhibitions Department, Iziko Museums of South Africa, Cape Town, South Africa
| | - José Braga
- Centre d'Anthropobiologie et de Génomique de Toulouse, Université Paul Sabatier Toulouse III, Faculté de Médecine Purpan, 37 Allées Jules Guesde, Toulouse, France; Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, 2050, South Africa
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Brophy JK, Moggi-Cecchi J, Matthews GJ, Bailey SE. Comparative morphometric analyses of the deciduous molars of Homo naledi from the Dinaledi Chamber, South Africa. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2020; 174:299-314. [PMID: 33290582 DOI: 10.1002/ajpa.24190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 10/12/2020] [Accepted: 11/09/2020] [Indexed: 11/08/2022]
Abstract
OBJECTIVES The purpose of this study is to help elucidate the taxonomic relationship between Homo naledi and other hominins. MATERIALS AND METHODS Homo naledi deciduous maxillary and mandibular molars from the Dinaledi Chamber, South Africa were compared to those of Australopithecus africanus, Australopithecus afarensis, Paranthropus robustus, Paranthropus boisei, early Homo sp., Homo erectus, early Homo sapiens, Upper Paleolithic H. sapiens, recent southern African H. sapiens, and Neanderthals by means of morphometric analyses of crown outlines and relative cusp areas. The crown shapes were analyzed using elliptical Fourier analyses followed by principal component analyses (PCA). The absolute and relative cusp areas were obtained in ImageJ and compared using PCA and cluster analyses. RESULTS PCA suggests that the crown shapes and relative cusp areas of mandibular molars are more diagnostic than the maxillary molars. The H. naledi deciduous mandibular first and second molar (dm1 and dm2 ) do not have a strong affinity to any taxon in the comparative sample in all analyses. While the H. naledi dm2 plots as an outlier in the relative cusp analysis, the H. naledi specimen fall closest to Australopithecus due to their relatively large metaconid, a primitive trait for the genus Homo. Although useful for differentiating Neanderthals from recent southern African H. sapiens and UP H. sapiens, the PCA of the relative cusp areas suggests that the deciduous maxillary second molars (dm2 ) do not differentiate other groups. The three H. naledi dm2 cuspal areas are variable and fall within the ranges of other Homo, as well as Australopithecus, and Paranthropus suggesting weak diagnostic utility. DISCUSSION This research provides another perspective on the morphology of, and variation within, H. naledi. The H. naledi deciduous molars do not consistently align with any genus or species in the comparative sample in either the crown shape or relative cusp analyses. This line of inquiry is consistent with other cranial and postcranial studies suggesting that H. naledi is unique.
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Affiliation(s)
- Juliet K Brophy
- Department of Geography and Anthropology, Louisiana State University, Baton Rouge, Louisiana, USA.,Evolutionary Studies Institute, University of the Witwatersrand, WITS, South Africa
| | - Jacopo Moggi-Cecchi
- Laboratori di Antropologia, Dipartimento di Biologia, Università degli Studi di Firenze, Florence, Italy
| | - Gregory J Matthews
- Department of Mathematics and Statistics, Loyola University Chicago, Chicago, Illinois, USA
| | - Shara E Bailey
- Center for the Study of Human Origins, Department of Anthropology, New York University, New York, New York, USA.,New York Consortium in Evolutionary Primatology, New York, New York, USA.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
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Pan L, Dumoncel J, Mazurier A, Zanolli C. Structural analysis of premolar roots in Middle Pleistocene hominins from China. J Hum Evol 2019; 136:102669. [DOI: 10.1016/j.jhevol.2019.102669] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 08/24/2019] [Accepted: 08/28/2019] [Indexed: 12/23/2022]
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Davies TW, Delezene LK, Gunz P, Hublin JJ, Skinner MM. Endostructural morphology in hominoid mandibular third premolars: Geometric morphometric analysis of dentine crown shape. J Hum Evol 2019; 133:198-213. [PMID: 31358180 DOI: 10.1016/j.jhevol.2019.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 06/19/2019] [Accepted: 06/19/2019] [Indexed: 01/17/2023]
Abstract
In apes, the mandibular third premolar (P3) is adapted for a role in honing the large upper canine. The role of honing was lost early in hominin evolution, releasing the tooth from this functional constraint and allowing it to respond to subsequent changes in masticatory demands. This led to substantial morphological changes, and as such the P3 has featured prominently in systematic analyses of the hominin clade. The application of microtomography has also demonstrated that examination of the enamel-dentine junction (EDJ) increases the taxonomic value of variations in crown morphology. Here we use geometric morphometric techniques to analyze the shape of the P3 EDJ in a broad sample of fossil hominins, modern humans, and extant apes (n = 111). We test the utility of P3 EDJ shape for distinguishing among hominoids, address the affinities of a number of hominin specimens of uncertain taxonomic attribution, and characterize the changes in P3 EDJ morphology across our sample, with particular reference to features relating to canine honing and premolar 'molarization'. We find that the morphology of the P3 EDJ is useful in taxonomic identification of individual specimens, with a classification accuracy of up to 88%. The P3 EDJ of canine-honing apes displays a tall protoconid, little metaconid development, and an asymmetrical crown shape. Plio-Pleistocene hominin taxa display derived masticatory adaptations at the EDJ, such as the molarized premolars of Australopithecus africanus and Paranthropus, which have well-developed marginal ridges, an enlarged talonid, and a large metaconid. Modern humans and Neanderthals display a tall dentine body and reduced metaconid development, a morphology shared with premolars from Mauer and the Cave of Hearths. Homo naledi displays a P3 EDJ morphology that is unique among our sample; it is quite unlike Middle Pleistocene and recent Homo samples and most closely resembles Australopithecus, Paranthropus and early Homo specimens.
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Affiliation(s)
- Thomas W Davies
- School of Anthropology and Conservation, University of Kent, Canterbury, CT2 7NZ, UK; Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany.
| | - Lucas K Delezene
- Department of Anthropology, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Philipp Gunz
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
| | - Jean-Jacques Hublin
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
| | - Matthew M Skinner
- School of Anthropology and Conservation, University of Kent, Canterbury, CT2 7NZ, UK; Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany
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Dykes SJ, Pilbrow VC. A mathematical landmark-based method for measuring worn molars in hominoid systematics. PeerJ 2019; 7:e6990. [PMID: 31198638 PMCID: PMC6535218 DOI: 10.7717/peerj.6990] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 04/20/2019] [Indexed: 11/30/2022] Open
Abstract
Worn teeth pose a major limitation to researchers in the fields of extinct and extant hominoid systematics because they lack clearly identifiable anatomical landmarks needed to take measurements on the crown enamel surface and are typically discarded from a study. This is particularly detrimental when sample sizes for some groups are already characteristically low, if there is an imbalance between samples representing populations, sexes or dietary strategies, or if the worn teeth in question are type specimens of fossil species or other key specimens. This study proposes a methodology based predominantly on mathematically-derived landmarks for measuring size and shape features of molars, irrespective of wear. With 110 specimens of lower second molars from five species of extant hominoids (Pan troglodytes, P. paniscus, Gorilla gorilla, G. beringei, Homo sapiens), n ≥ 20 per species, n ≥ 10 per subspecies, good species separation in morphospace is achieved in a principal components analysis. Classification accuracy in a discriminant function analysis is 96.4% at the species level and 88.2% at the subspecies level (92.7% and 79.1%, respectively, on cross-validation). The classification accuracy compares favorably to that achieved by anatomically-derived measurements based on published research (94% and 84% at the species and subspecies level respectively; 91% and 76% on cross-validation). The mathematical landmarking methodology is rapid and uncomplicated. The results support the use of mathematical landmarks to enable the inclusion of worn molar teeth in dental studies so as to maximize sample sizes and restore balance between populations and/or sexes in hominoid systematic studies.
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Affiliation(s)
- Susan J. Dykes
- Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg, South Africa
- School of Geosciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Varsha C. Pilbrow
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Australia
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13
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Krenn VA, Fornai C, Wurm L, Bookstein FL, Haeusler M, Weber GW. Variation of 3D outer and inner crown morphology in modern human mandibular premolars. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 169:646-663. [PMID: 31099892 PMCID: PMC6767701 DOI: 10.1002/ajpa.23858] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 05/02/2019] [Accepted: 05/06/2019] [Indexed: 12/30/2022]
Abstract
Objectives This study explores the outer and inner crown of lower third and fourth premolars (P3, P4) by analyzing the morphological variation among diverse modern human groups. Materials and Methods We studied three‐dimensional models of the outer enamel surface and the enamel–dentine junction (EDJ) from μCT datasets of 77 recent humans using both an assessment of seven nonmetric traits and a standard geometric morphometric (GM) analysis. For the latter, the dental crown was represented by four landmarks (dentine horns and fossae), 20 semilandmarks along the EDJ marginal ridge, and pseudolandmarks along the crown and cervical outlines. Results Certain discrete traits showed significantly different regional frequencies and sexual dimorphism. The GM analyses of both P3s and P4s showed extensive overlap in shape variation of the various populations (classification accuracy 15–69%). The first principal components explained about 40% of shape variance with a correlation between 0.59 and 0.87 of the features of P3s and P4s. Shape covariation between P3s and P4s expressed concordance of high and narrow or low and broad crowns. Conclusions Due to marked intragroup and intergroup variation in GM analyses of lower premolars, discrete traits such as the number of lingual cusps and mesiolingual groove expression provide better geographic separation of modern human populations. The greater variability of the lingual region suggests a dominance of functional constraints over geographic provenience or sex. Additional information about functionally relevant aspects of the crown surface and odontogenetic data are needed to unravel the factors underlying dental morphology in modern humans.
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Affiliation(s)
- Viktoria A Krenn
- Institute of Evolutionary Medicine, University of Zurich, 8057 Zurich, Switzerland.,Department of Evolutionary Anthropology, University of Vienna, 1090 Vienna, Austria
| | - Cinzia Fornai
- Institute of Evolutionary Medicine, University of Zurich, 8057 Zurich, Switzerland.,Department of Evolutionary Anthropology, University of Vienna, 1090 Vienna, Austria
| | - Lisa Wurm
- Department for Clinical Veterinary Medicine, Ludwig-Maximilians University of Munich, 80539 Munich, Germany
| | - Fred L Bookstein
- Department of Evolutionary Anthropology, University of Vienna, 1090 Vienna, Austria.,Department of Statistics, University of Washington, Seattle, WA-98195, Washington, USA
| | - Martin Haeusler
- Institute of Evolutionary Medicine, University of Zurich, 8057 Zurich, Switzerland
| | - Gerhard W Weber
- Department of Evolutionary Anthropology, University of Vienna, 1090 Vienna, Austria.,Core Facility for Micro-Computed Tomography, 1090 Vienna, Austria
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14
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Braga J, Zimmer V, Dumoncel J, Samir C, de Beer F, Zanolli C, Pinto D, Rohlf FJ, Grine FE. Efficacy of diffeomorphic surface matching and 3D geometric morphometrics for taxonomic discrimination of Early Pleistocene hominin mandibular molars. J Hum Evol 2019; 130:21-35. [PMID: 31010541 DOI: 10.1016/j.jhevol.2019.01.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 12/23/2022]
Abstract
Morphometric assessments of the dentition have played significant roles in hypotheses relating to taxonomic diversity among extinct hominins. In this regard, emphasis has been placed on the statistical appraisal of intraspecific variation to identify morphological criteria that convey maximum discriminatory power. Three-dimensional geometric morphometric (3D GM) approaches that utilize landmarks and semi-landmarks to quantify shape variation have enjoyed increasingly popular use over the past twenty-five years in assessments of the outer enamel surface (OES) and enamel-dentine junction (EDJ) of fossil molars. Recently developed diffeomorphic surface matching (DSM) methods that model the deformation between shapes have drastically reduced if not altogether eliminated potential methodological inconsistencies associated with the a priori identification of landmarks and delineation of semi-landmarks. As such, DSM has the potential to better capture the geometric details that describe tooth shape by accounting for both homologous and non-homologous (i.e., discrete) features, and permitting the statistical determination of geometric correspondence. We compare the discriminatory power of 3D GM and DSM in the evaluation of the OES and EDJ of mandibular permanent molars attributed to Australopithecus africanus, Paranthropus robustus and early Homo sp. from the sites of Sterkfontein and Swartkrans. For all three molars, classification and clustering scores demonstrate that DSM performs better at separating the A. africanus and P. robustus samples than does 3D GM. The EDJ provided the best results. P. robustus evinces greater morphological variability than A. africanus. The DSM assessment of the early Homo molar from Swartkrans reveals its distinctiveness from either australopith sample, and the "unknown" specimen from Sterkfontein (Stw 151) is notably more similar to Homo than to A. africanus.
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Affiliation(s)
- José Braga
- Computer-assisted Palaeoanthropology Team, UMR 5288 CNRS-Université de Toulouse (Paul Sabatier), 37 Allées Jules Guesde, 31000 Toulouse, France; Evolutionary Studies Institute, University of the Witwatersrand, Johannesburg 2050, South Africa.
| | - Veronika Zimmer
- Department of Anatomy, Faculty of Health Sciences, University of Pretoria, Pretoria 0001, South Africa; Department of Biomedical Engineering, King's College London, London, UK.
| | - Jean Dumoncel
- Computer-assisted Palaeoanthropology Team, UMR 5288 CNRS-Université de Toulouse (Paul Sabatier), 37 Allées Jules Guesde, 31000 Toulouse, France.
| | - Chafik Samir
- LIMOS, UMR 6158 CNRS-Université Clermont Auvergne, 63173 Aubière, France.
| | - Frikkie de Beer
- South African Nuclear Energy Corporation (NECSA), Pelindaba, North West Province, South Africa.
| | - Clément Zanolli
- Computer-assisted Palaeoanthropology Team, UMR 5288 CNRS-Université de Toulouse (Paul Sabatier), 37 Allées Jules Guesde, 31000 Toulouse, France.
| | - Deborah Pinto
- Computer-assisted Palaeoanthropology Team, UMR 5288 CNRS-Université de Toulouse (Paul Sabatier), 37 Allées Jules Guesde, 31000 Toulouse, France.
| | - F James Rohlf
- Department of Anthropology, Stony Brook University, Stony Brook, NY 11794, USA.
| | - Frederick E Grine
- Department of Anthropology, Stony Brook University, Stony Brook, NY 11794, USA; Department of Anatomical Sciences, Stony Brook University, Stony Brook, NY 11794, USA.
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15
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Stelzer S, Neubauer S, Hublin JJ, Spoor F, Gunz P. Morphological trends in arcade shape and size in Middle Pleistocene Homo. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 168:70-91. [PMID: 30351445 DOI: 10.1002/ajpa.23721] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 07/26/2018] [Accepted: 09/11/2018] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Middle Pleistocene fossil hominins, often summarized as Homo heidelbergensis sensu lato, are difficult to interpret due to a fragmentary fossil record and ambiguous combinations of primitive and derived characters. Here, we focus on one aspect of facial shape and analyze shape variation of the dental arcades of these fossils together with other Homo individuals. MATERIALS AND METHODS Three-dimensional landmark data were collected on computed tomographic scans and surface scans of Middle Pleistocene fossil hominins (n = 8), Homo erectus s.l. (n = 4), Homo antecessor (n = 1), Homo neanderthalensis (n = 13), recent (n = 52) and fossil (n = 19) Homo sapiens. To increase sample size, we used multiple multivariate regression to reconstruct complementary arches for isolated mandibles, and explored size and shape differences among maxillary arcades. RESULTS The shape of the dental arcade in H. erectus s.l. and H. antecessor differs markedly from both Neanderthals and H. sapiens. The latter two show subtle but consistent differences in arcade length and width. Shape variation among Middle Pleistocene fossil hominins does not exceed the amount of variation of other species, but includes individuals with more primitive and more derived morphology, all more similar to Neanderthals and H. sapiens than to H. erectus s.l. DISCUSSION Although our results cannot reject the hypothesis that the Middle Pleistocene fossil hominins belong to a single species, their shape variation comprises a more primitive morph that represents a likely candidate for the shape of the last common ancestor of Neanderthals and H. sapiens, and a more derived morph resembling Neanderthals. The arcade shape difference between Neanderthals and H. sapiens might be related to different ways to withstand mechanical stress.
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Affiliation(s)
- Stefanie Stelzer
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Simon Neubauer
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Jean-Jacques Hublin
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Fred Spoor
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.,Department of Earth Sciences, The Natural History Museum, London, United Kingdom.,Department of Anthropology, University College London (UCL), London, United Kingdom
| | - Philipp Gunz
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
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16
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Meyer MR, Woodward C, Tims A, Bastir M. Neck function in early hominins and suspensory primates: Insights from the uncinate process. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 166:613-637. [PMID: 29492962 DOI: 10.1002/ajpa.23448] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 02/02/2018] [Accepted: 02/06/2018] [Indexed: 11/11/2022]
Abstract
OBJECTIVES Uncinate processes are protuberances on the cranial surface of subaxial cervical vertebrae that assist in stabilizing and guiding spinal motion. Shallow uncinate processes reduce cervical stability but confer an increased range of motion in clinical studies. Here we assess uncinate processes among extant primates and model cervical kinematics in early fossil hominins. MATERIALS AND METHODS We compare six fossil hominin vertebrae with 48 Homo sapiens and 99 nonhuman primates across 20 genera. We quantify uncinate morphology via geometric morphometric methods to understand how uncinate process shape relates to allometry, taxonomy, and mode of locomotion. RESULTS Across primates, allometry explains roughly 50% of shape variation, as small, narrow vertebrae feature the relatively tallest, most pronounced uncinate processes, whereas larger, wider vertebrae typically feature reduced uncinates. Taxonomy only weakly explains the residual variation, however, the association between Uncinate Shape and mode of locomotion is robust, as bipeds and suspensory primates occupy opposite extremes of the morphological continuum and are distinguished from arboreal generalists. Like humans, Australopithecus afarensis and Homo erectus exhibit shallow uncinate processes, whereas A. sediba resembles more arboreal taxa, but not fully suspensory primates. DISCUSSION Suspensory primates exhibit the most pronounced uncinates, likely to maintain visual field stabilization. East African hominins exhibit reduced uncinate processes compared with African apes and A. sediba, likely signaling different degrees of neck motility and modes of locomotion. Although soft tissues constrain neck flexibility beyond limits suggested by osteology alone, this study may assist in modeling cervical kinematics and positional behaviors in extinct taxa.
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Affiliation(s)
- Marc R Meyer
- Department of Anthropology, Chaffey College, Rancho Cucamonga, California 91737
| | - Charles Woodward
- Department of Anthropology, University of California, Berkeley, California 94720
| | - Amy Tims
- Department of Wildlife, Fish, & Conservation Biology, University of California, Davis, California 95616
| | - Markus Bastir
- Paleoanthropology Group, Museo Nacional de Ciencias Naturales (MNCN-CSIC), Madrid 28006, Spain
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17
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Yong R, Ranjitkar S, Lekkas D, Halazonetis D, Evans A, Brook A, Townsend G. Three‐dimensional (3D) geometric morphometric analysis of human premolars to assess sexual dimorphism and biological ancestry in Australian populations. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 166:373-385. [DOI: 10.1002/ajpa.23438] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 01/28/2018] [Accepted: 01/29/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Robin Yong
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
| | - Sarbin Ranjitkar
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
| | - Dimitra Lekkas
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
| | - Demetrios Halazonetis
- School of DentistryNational and Kapodistrian University of AthensAthens 11527 Greece
| | - Alistair Evans
- School of Biological SciencesMonash UniversityClayton Victoria 3800 Australia
| | - Alan Brook
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
- Institute of DentistryQueen Mary University of LondonLondon E1 4NS United Kingdom
| | - Grant Townsend
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
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18
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Hanegraef H, Martinón-Torres M, Martínez de Pinillos M, Martín-Francés L, Vialet A, Arsuaga JL, Bermúdez de Castro JM. Dentine morphology of Atapuerca-Sima de los Huesos lower molars: Evolutionary implications through three-dimensional geometric morphometric analysis. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 166:276-295. [PMID: 29417989 DOI: 10.1002/ajpa.23428] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 11/06/2017] [Accepted: 01/18/2018] [Indexed: 11/08/2022]
Abstract
OBJECTIVES This study aims to explore the affinities of the Sima de los Huesos (SH) population in relation to Homo neanderthalensis, Arago, and early and contemporary Homo sapiens. By characterizing SH intra-population variation, we test current models to explain the Neanderthal origins. MATERIALS AND METHODS Three-dimensional reconstructions of dentine surfaces of lower first and second molars were produced by micro-computed tomography. Landmarks and sliding semilandmarks were subjected to generalized Procrustes analysis and principal components analysis. RESULTS SH is often similar in shape to Neanderthals, and both groups are generally discernible from Homo sapiens. For example, the crown height of SH and Neanderthals is lower than for modern humans. Differences in the presence of a mid-trigonid crest are also observed, with contemporary Homo sapiens usually lacking this feature. Although SH and Neanderthals show strong affinities, they can be discriminated based on certain traits. SH individuals are characterized by a lower intra-population variability, and show a derived dental reduction in lower second molars compared to Neanderthals. SH also differs in morphological features from specimens that are often classified as Homo heidelbergensis, such as a lower crown height and less pronounced mid-trigonid crest in the Arago fossils. DISCUSSION Our results are compatible with the idea that multiple evolutionary lineages or populations coexisted in Europe during the Middle Pleistocene, with the SH paradigm phylogenetically closer to Homo neanderthalensis. Further research could support the possibility of SH as a separate taxon. Alternatively, SH could be a subspecies of Neanderthals, with the variability of this clade being remarkably higher than previously thought.
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Affiliation(s)
- Hester Hanegraef
- Department of Anthropology, University College London (UCL), 14 Taviton Street, London, WC1H 0BW, United Kingdom
| | - María Martinón-Torres
- Department of Anthropology, University College London (UCL), 14 Taviton Street, London, WC1H 0BW, United Kingdom.,National Research Center on Human Evolution (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
| | - Marina Martínez de Pinillos
- Department of Anthropology, University College London (UCL), 14 Taviton Street, London, WC1H 0BW, United Kingdom.,National Research Center on Human Evolution (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
| | - Laura Martín-Francés
- National Research Center on Human Evolution (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain.,Université de Bordeaux, CNRS, MCC, PACEA, UMR 5199 F_33615, Pessac Cedex, France
| | - Amélie Vialet
- Département de Préhistoire du Muséum National d'Histoire Naturelle, Institut de Paléontologie Humaine, 1 Rue René-Panhard, Paris, 75013, France
| | - Juan Luis Arsuaga
- Centro Mixto UCM-ISCIII de Evolución y Comportamiento Humanos, Avd. Monforte de Lemos 5, Pabellón 14, Madrid, 28029, Spain
| | - José María Bermúdez de Castro
- Department of Anthropology, University College London (UCL), 14 Taviton Street, London, WC1H 0BW, United Kingdom.,National Research Center on Human Evolution (CENIEH), Paseo de la Sierra de Atapuerca 3, Burgos, 09002, Spain
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19
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Woods C, Fernee C, Browne M, Zakrzewski S, Dickinson A. The potential of statistical shape modelling for geometric morphometric analysis of human teeth in archaeological research. PLoS One 2017; 12:e0186754. [PMID: 29216199 PMCID: PMC5720725 DOI: 10.1371/journal.pone.0186754] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Accepted: 10/07/2017] [Indexed: 01/15/2023] Open
Abstract
This paper introduces statistical shape modelling (SSM) for use in osteoarchaeology research. SSM is a full field, multi-material analytical technique, and is presented as a supplementary geometric morphometric (GM) tool. Lower mandibular canines from two archaeological populations and one modern population were sampled, digitised using micro-CT, aligned, registered to a baseline and statistically modelled using principal component analysis (PCA). Sample material properties were incorporated as a binary enamel/dentin parameter. Results were assessed qualitatively and quantitatively using anatomical landmarks. Finally, the technique’s application was demonstrated for inter-sample comparison through analysis of the principal component (PC) weights. It was found that SSM could provide high detail qualitative and quantitative insight with respect to archaeological inter- and intra-sample variability. This technique has value for archaeological, biomechanical and forensic applications including identification, finite element analysis (FEA) and reconstruction from partial datasets.
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Affiliation(s)
- Christopher Woods
- Bioengineering Sciences Research Group, University of Southampton, Highfield Campus, Highfield, Southampton, United Kingdom
| | - Christianne Fernee
- Department of Archaeology, University of Southampton, Avenue Campus, Highfield, Southampton, United Kingdom
| | - Martin Browne
- Bioengineering Sciences Research Group, University of Southampton, Highfield Campus, Highfield, Southampton, United Kingdom
| | - Sonia Zakrzewski
- Department of Archaeology, University of Southampton, Avenue Campus, Highfield, Southampton, United Kingdom
| | - Alexander Dickinson
- Bioengineering Sciences Research Group, University of Southampton, Highfield Campus, Highfield, Southampton, United Kingdom
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20
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Shearer BM, Cooke SB, Halenar LB, Reber SL, Plummer JE, Delson E, Tallman M. Evaluating causes of error in landmark-based data collection using scanners. PLoS One 2017; 12:e0187452. [PMID: 29099867 PMCID: PMC5669428 DOI: 10.1371/journal.pone.0187452] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Accepted: 10/19/2017] [Indexed: 11/18/2022] Open
Abstract
In this study, we assess the precision, accuracy, and repeatability of craniodental landmarks (Types I, II, and III, plus curves of semilandmarks) on a single macaque cranium digitally reconstructed with three different surface scanners and a microCT scanner. Nine researchers with varying degrees of osteological and geometric morphometric knowledge landmarked ten iterations of each scan (40 total) to test the effects of scan quality, researcher experience, and landmark type on levels of intra- and interobserver error. Two researchers additionally landmarked ten specimens from seven different macaque species using the same landmark protocol to test the effects of the previously listed variables relative to species-level morphological differences (i.e., observer variance versus real biological variance). Error rates within and among researchers by scan type were calculated to determine whether or not data collected by different individuals or on different digitally rendered crania are consistent enough to be used in a single dataset. Results indicate that scan type does not impact rate of intra- or interobserver error. Interobserver error is far greater than intraobserver error among all individuals, and is similar in variance to that found among different macaque species. Additionally, experience with osteology and morphometrics both positively contribute to precision in multiple landmarking sessions, even where less experienced researchers have been trained in point acquisition. Individual training increases precision (although not necessarily accuracy), and is highly recommended in any situation where multiple researchers will be collecting data for a single project.
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Affiliation(s)
- Brian M. Shearer
- Ph.D. Program in Anthropology, The Graduate Center (CUNY), New York, New York, United States of America
- New York Consortium in Evolutionary Primatology, New York, New York, United States of America
- NYCEP Morphometrics Group, New York, New York, United States of America
| | - Siobhán B. Cooke
- NYCEP Morphometrics Group, New York, New York, United States of America
- Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Lauren B. Halenar
- New York Consortium in Evolutionary Primatology, New York, New York, United States of America
- NYCEP Morphometrics Group, New York, New York, United States of America
- Department of Biology, Farmingdale State College (SUNY), Farmingdale, New York, United States of America
| | - Samantha L. Reber
- School of Forensic and Applied Sciences, University of Central Lancashire, Preston, United Kingdom
| | - Jeannette E. Plummer
- Department of Archaeology, University of Sheffield, South Yorkshire, United Kingdom
| | - Eric Delson
- Ph.D. Program in Anthropology, The Graduate Center (CUNY), New York, New York, United States of America
- New York Consortium in Evolutionary Primatology, New York, New York, United States of America
- NYCEP Morphometrics Group, New York, New York, United States of America
- Division of Vertebrate Paleontology, American Museum of Natural History, New York, New York, United States of America
- Department of Anthropology, Lehman College (CUNY), Bronx, New York, United States of America
| | - Melissa Tallman
- NYCEP Morphometrics Group, New York, New York, United States of America
- Department of Biomedical Sciences, Grand Valley State University, Grand Valley, Michigan, United States of America
- * E-mail:
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21
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Bermúdez de Castro JM, Martinón-Torres M, Arsuaga JL, Carbonell E. Twentieth anniversary of Homo antecessor (1997-2017): a review. Evol Anthropol 2017; 26:157-171. [PMID: 28815959 DOI: 10.1002/evan.21540] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2017] [Indexed: 01/09/2023]
Abstract
It has been twenty years since diagnosis and publication of the species Homo antecessor.1 Since then, new human fossils recovered from the TD6 level of the Gran Dolina site (Sierra de Atapuerca, northern Spain) have helped to refine its taxonomic and phylogenetic position. In this paper, we present a synthesis of the most characteristic features of this species, as well as our interpretation derived from the latest investigations. We focus on the phylogenetic interpretation of Homo antecessor, taking into account the most recent paleogenetic analyses and a reassessment of the European Middle Pleistocene hominin record. We try to show that, twenty years after its publication, H. antecessor provides a good opportunity to address the morphology of the last common ancestor of Neandertals and modern humans.
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Affiliation(s)
- José María Bermúdez de Castro
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo de la Sierra de Atapuerca 3, 09002, Burgos, Spain.,Department of Anthropology, University College London, 14 Taviton Street, London, WC1H 0BW, UK
| | - María Martinón-Torres
- Department of Anthropology, University College London, 14 Taviton Street, London, WC1H 0BW, UK.,Departamento de la Ciencias Históricas y Geografía, Universidad de Burgos, Hospital del Rey S/N, 09001, Burgos, Spain
| | - Juan Luis Arsuaga
- Centro Mixto UCM-ISCIII de Evolución y Comportamiento Humanos, Madrid, Spain
| | - Eudald Carbonell
- Institut Català de Paleoecologia Humana i Evolució Social (IPHES), C/ Escorxador s/n, 43003, Tarragona, Spain.,Laboratory of Human Evolution, Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Chinese Academy of Sciences, 100044, Beijing, China
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22
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Fuss J, Spassov N, Begun DR, Böhme M. Potential hominin affinities of Graecopithecus from the Late Miocene of Europe. PLoS One 2017; 12:e0177127. [PMID: 28531170 PMCID: PMC5439669 DOI: 10.1371/journal.pone.0177127] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 04/21/2017] [Indexed: 11/18/2022] Open
Abstract
The split of our own clade from the Panini is undocumented in the fossil record. To fill this gap we investigated the dentognathic morphology of Graecopithecus freybergi from Pyrgos Vassilissis (Greece) and cf. Graecopithecus sp. from Azmaka (Bulgaria), using new μCT and 3D reconstructions of the two known specimens. Pyrgos Vassilissis and Azmaka are currently dated to the early Messinian at 7.175 Ma and 7.24 Ma. Mainly based on its external preservation and the previously vague dating, Graecopithecus is often referred to as nomen dubium. The examination of its previously unknown dental root and pulp canal morphology confirms the taxonomic distinction from the significantly older northern Greek hominine Ouranopithecus. Furthermore, it shows features that point to a possible phylogenetic affinity with hominins. G. freybergi uniquely shares p4 partial root fusion and a possible canine root reduction with this tribe and therefore, provides intriguing evidence of what could be the oldest known hominin.
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Affiliation(s)
- Jochen Fuss
- Department of Geoscience, Eberhard-Karls-University Tübingen, Sigwartstr. 10, Tübingen, Germany
- Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP). Sigwartstr. 10, Tübingen, Germany
| | - Nikolai Spassov
- National Museum of Natural History, Bulgarian Academy of Sciences, 1 Blvd Tzar Osvoboditel, Sofia, Bulgaria
| | - David R. Begun
- Department of Anthropology, University of Toronto, Toronto, Ontario, Canada
| | - Madelaine Böhme
- Department of Geoscience, Eberhard-Karls-University Tübingen, Sigwartstr. 10, Tübingen, Germany
- Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP). Sigwartstr. 10, Tübingen, Germany
- * E-mail:
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Modesto-Mata M, García-Campos C, Martín-Francés L, Martínez de Pinillos M, García-González R, Quintino Y, Canals A, Lozano M, Dean MC, Martinón-Torres M, Bermúdez de Castro JM. New methodology to reconstruct in 2-D the cuspal enamel of modern human lower molars. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2017; 163:824-834. [DOI: 10.1002/ajpa.23243] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 01/29/2017] [Accepted: 04/23/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Mario Modesto-Mata
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH); Burgos 09002 Spain
- Equipo Primeros Pobladores de Extremadura, Casa de la Cultura Rodríguez Moñino; Cáceres Spain
| | - Cecilia García-Campos
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH); Burgos 09002 Spain
- Anthropology Department; University College London; London UK
| | - Laura Martín-Francés
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH); Burgos 09002 Spain
- Anthropology Department; University College London; London UK
| | - Marina Martínez de Pinillos
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH); Burgos 09002 Spain
- Anthropology Department; University College London; London UK
| | - Rebeca García-González
- Laboratorio de Evolución Humana, Área de Paleontología, Dpto. de Ciencias Históricas y Geografía, Universidad de Burgos; Burgos Spain
| | - Yuliet Quintino
- Laboratorio de Evolución Humana, Área de Paleontología, Dpto. de Ciencias Históricas y Geografía, Universidad de Burgos; Burgos Spain
| | - Antoni Canals
- Equipo Primeros Pobladores de Extremadura, Casa de la Cultura Rodríguez Moñino; Cáceres Spain
- IPHES Institut Català de Paleoecologia Humana i Evolució Social; C/Marcel.lí Domingo s/n, Campus Sescelades URV (Edifici W3) Tarragona 43007 Spain
- Àrea de Prehistòria Universitat Rovira i Virgili (URV); Tarragona 43002 Spain
| | - Marina Lozano
- IPHES Institut Català de Paleoecologia Humana i Evolució Social; C/Marcel.lí Domingo s/n, Campus Sescelades URV (Edifici W3) Tarragona 43007 Spain
| | - M. Christopher Dean
- Department of Cell and Developmental Biology; University College London; London UK
| | - María Martinón-Torres
- Anthropology Department; University College London; London UK
- Laboratorio de Evolución Humana, Área de Paleontología, Dpto. de Ciencias Históricas y Geografía, Universidad de Burgos; Burgos Spain
| | - José María Bermúdez de Castro
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH); Burgos 09002 Spain
- Anthropology Department; University College London; London UK
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Martin RM, Hublin JJ, Gunz P, Skinner MM. The morphology of the enamel–dentine junction in Neanderthal molars: Gross morphology, non-metric traits, and temporal trends. J Hum Evol 2017; 103:20-44. [DOI: 10.1016/j.jhevol.2016.12.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 12/19/2016] [Accepted: 12/20/2016] [Indexed: 12/15/2022]
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25
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Fan PF, He K, Chen X, Ortiz A, Zhang B, Zhao C, Li YQ, Zhang HB, Kimock C, Wang WZ, Groves C, Turvey ST, Roos C, Helgen KM, Jiang XL. Description of a new species of Hoolock
gibbon (Primates: Hylobatidae) based on integrative taxonomy. Am J Primatol 2017; 79. [DOI: 10.1002/ajp.22631] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 10/27/2016] [Accepted: 11/18/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Peng-Fei Fan
- School of Life Sciences; Sun Yat-sen University; Guangzhou China
- Institute of Eastern-Himalaya Biodiversity Research; Dali University; Dali China
| | - Kai He
- Kunming Institute of Zoology; Chinese Academy of Sciences; Kunming China
- Department of Vertebrate Zoology; National Museum of Natural History; Smithsonian Institution; Washington, D.C
- The Kyoto University Museum; Kyoto University; Kyoto Japan
| | - Xing Chen
- Kunming Institute of Zoology; Chinese Academy of Sciences; Kunming China
| | - Alejandra Ortiz
- Department of Anthropology; Center for the Study of Human Origins; New York University; New York
- New York Consortium in Evolutionary Primatology (NYCEP); New York
- Institute of Human Origins; School of Human Evolution and Social Change; Arizona State University; Tempe Arizona
| | - Bin Zhang
- Kunming Institute of Zoology; Chinese Academy of Sciences; Kunming China
| | - Chao Zhao
- Cloud Mountain Conservation; Dali China
| | | | | | - Clare Kimock
- Department of Anthropology; Center for the Study of Human Origins; New York University; New York
- New York Consortium in Evolutionary Primatology (NYCEP); New York
| | - Wen-Zhi Wang
- Kunming Institute of Zoology; Chinese Academy of Sciences; Kunming China
| | - Colin Groves
- School of Archaeology and Anthropology; Australian National University; Acton Australian Capital Territory Australia
| | | | - Christian Roos
- Gene Bank of Primates and Primate Genetics Laboratory; German Primate Center; Leibniz Institute for Primate Research; Göttingen Germany
| | - Kristofer M. Helgen
- Department of Vertebrate Zoology; National Museum of Natural History; Smithsonian Institution; Washington, D.C
| | - Xue-Long Jiang
- Kunming Institute of Zoology; Chinese Academy of Sciences; Kunming China
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26
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Bailey SE, Weaver TD, Hublin JJ. The Dentition of the Earliest Modern Humans: How ‘Modern’ Are They? VERTEBRATE PALEOBIOLOGY AND PALEOANTHROPOLOGY 2017. [DOI: 10.1007/978-3-319-46646-0_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Nova Delgado M, Galbany J, Pérez-Pérez A. Molar shape variability in platyrrhine primates. J Hum Evol 2016; 99:79-92. [PMID: 27650581 DOI: 10.1016/j.jhevol.2016.07.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 07/18/2016] [Accepted: 07/22/2016] [Indexed: 11/26/2022]
Abstract
Recent phylogenetic analyses suggest that platyrrhines constitute a monophyletic group represented by three families: Cebidae, Atelidae, and Pitheciidae. Morphological variability between and within these three families, however, is widely discussed and debated. The aim of this study was to assess molar shape variability in platyrrhines, to explore patterns of interspecific variation among extant species, and to evaluate how molar shape can be used as a taxonomic indicator. The analyses were conducted using standard multivariate analyses of geometric morphometric data from 802 platyrrhine lower molars. The results indicated that the interspecific variation exhibited a highly homoplastic pattern related to functional adaptation of some taxa. However, phylogeny was also an important factor in shaping molar morphological traits, given that some phenotypic similarities were consistent with current phylogenetic positions. Our results show that the phylogenetic and functional signals of lower molar shape vary depending on the taxa and the tooth considered. Based on molar shape, Aotus showed closer similarities to Callicebus, as well as to some Cebidae and Ateles-Lagothrix, due to convergent evolutionary trends caused by similar dietary habits, or due to fast-evolving branches in the Aotus lineage, somewhat similar to the shape of Callicebus and Cebidae.
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Affiliation(s)
- Mónica Nova Delgado
- Secció de Zoologia i Antropologia Biològica, Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Jordi Galbany
- Secció de Zoologia i Antropologia Biològica, Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain; Center for the Advanced Study of Human Paleobiology, Department of Anthropology, George Washington University, 800 22nd Street NW, Ste 6000, Washington, D.C. 20052, USA
| | - Alejandro Pérez-Pérez
- Secció de Zoologia i Antropologia Biològica, Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain.
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Takács P, Vitál Z, Ferincz Á, Staszny Á. Repeatability, Reproducibility, Separative Power and Subjectivity of Different Fish Morphometric Analysis Methods. PLoS One 2016; 11:e0157890. [PMID: 27327896 PMCID: PMC4915670 DOI: 10.1371/journal.pone.0157890] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 06/05/2016] [Indexed: 11/19/2022] Open
Abstract
We compared the repeatability, reproducibility (intra- and inter-measurer similarity), separative power and subjectivity (measurer effect on results) of four morphometric methods frequently used in ichthyological research, the "traditional" caliper-based (TRA) and truss-network (TRU) distance methods and two geometric methods that compare landmark coordinates on the body (GMB) and scales (GMS). In each case, measurements were performed three times by three measurers on the same specimen of three common cyprinid species (roach Rutilus rutilus (Linnaeus, 1758), bleak Alburnus alburnus (Linnaeus, 1758) and Prussian carp Carassius gibelio (Bloch, 1782)) collected from three closely-situated sites in the Lake Balaton catchment (Hungary) in 2014. TRA measurements were made on conserved specimens using a digital caliper, while TRU, GMB and GMS measurements were undertaken on digital images of the bodies and scales. In most cases, intra-measurer repeatability was similar. While all four methods were able to differentiate the source populations, significant differences were observed in their repeatability, reproducibility and subjectivity. GMB displayed highest overall repeatability and reproducibility and was least burdened by measurer effect. While GMS showed similar repeatability to GMB when fish scales had a characteristic shape, it showed significantly lower reproducability (compared with its repeatability) for each species than the other methods. TRU showed similar repeatability as the GMS. TRA was the least applicable method as measurements were obtained from the fish itself, resulting in poor repeatability and reproducibility. Although all four methods showed some degree of subjectivity, TRA was the only method where population-level detachment was entirely overwritten by measurer effect. Based on these results, we recommend a) avoidance of aggregating different measurer's datasets when using TRA and GMS methods; and b) use of image-based methods for morphometric surveys. Automation of the morphometric workflow would also reduce any measurer effect and eliminate measurement and data-input errors.
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Affiliation(s)
- Péter Takács
- MTA, Centre for Ecological Research, Balaton Limnological Institute, Tihany, Hungary
- * E-mail:
| | - Zoltán Vitál
- MTA, Centre for Ecological Research, Balaton Limnological Institute, Tihany, Hungary
| | - Árpád Ferincz
- Szent István University, Department of Aquaculture, Gödöllő, Hungary
| | - Ádám Staszny
- Szent István University, Department of Aquaculture, Gödöllő, Hungary
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30
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Homo floresiensis-like fossils from the early Middle Pleistocene of Flores. Nature 2016; 534:245-8. [DOI: 10.1038/nature17999] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 04/13/2016] [Indexed: 11/09/2022]
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31
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Hominin teeth from the Middle Pleistocene site of Yiyuan, Eastern China. J Hum Evol 2016; 95:33-54. [DOI: 10.1016/j.jhevol.2016.03.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 03/08/2016] [Accepted: 03/09/2016] [Indexed: 01/17/2023]
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32
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Nova Delgado M, Galbany J, Pérez-Pérez A. Morphometric variation of extant platyrrhine molars: taxonomic implications for fossil platyrrhines. PeerJ 2016; 4:e1967. [PMID: 27190704 PMCID: PMC4867715 DOI: 10.7717/peerj.1967] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 04/04/2016] [Indexed: 12/25/2022] Open
Abstract
The phylogenetic position of many fossil platyrrhines with respect to extant ones is not yet clear. Two main hypotheses have been proposed: the layered or successive radiations hypothesis suggests that Patagonian fossils are Middle Miocene stem platyrrhines lacking modern descendants, whereas the long lineage hypothesis argues for an evolutionary continuity of all fossil platyrrhines with the extant ones. Our geometric morphometric analysis of a 15 landmark-based configuration of platyrrhines' first and second lower molars suggest that morphological stasis may explain the reduced molar shape variation observed. Platyrrhine lower molar shape might be a primitive retention of the ancestral state affected by strong ecological constraints throughout the radiation of the main platyrrhine families. The Patagonian fossil specimens showed two distinct morphological patterns of lower molars, Callicebus-like and Saguinus-like, which might be the precursors of the extant forms, whereas the Middle Miocene specimens, though showing morphological resemblances with the Patagonian fossils, also displayed new, derived molar patterns, Alouatta-like and Pitheciinae-like, thereby suggesting that despite the overall morphological stasis of molars, phenotypic diversification of molar shape was already settled during the Middle Miocene.
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Affiliation(s)
- Mónica Nova Delgado
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Zoology and Physical Anthropology Section, Universitat de Barcelona , Barcelona , Spain
| | - Jordi Galbany
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Zoology and Physical Anthropology Section, Universitat de Barcelona, Barcelona, Spain; Center for the Advanced Study of Human Paleobiology, Department of Anthropology, George Washington University, Washington DC, United States of America
| | - Alejandro Pérez-Pérez
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Zoology and Physical Anthropology Section, Universitat de Barcelona , Barcelona , Spain
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33
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Phylogenetic signal in molar dental shape of extant and fossil catarrhine primates. J Hum Evol 2016; 94:13-27. [DOI: 10.1016/j.jhevol.2016.01.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 09/28/2015] [Accepted: 01/23/2016] [Indexed: 11/17/2022]
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Choudhry P. High-Throughput Method for Automated Colony and Cell Counting by Digital Image Analysis Based on Edge Detection. PLoS One 2016; 11:e0148469. [PMID: 26848849 PMCID: PMC4746068 DOI: 10.1371/journal.pone.0148469] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 01/17/2016] [Indexed: 11/25/2022] Open
Abstract
Counting cells and colonies is an integral part of high-throughput screens and quantitative cellular assays. Due to its subjective and time-intensive nature, manual counting has hindered the adoption of cellular assays such as tumor spheroid formation in high-throughput screens. The objective of this study was to develop an automated method for quick and reliable counting of cells and colonies from digital images. For this purpose, I developed an ImageJ macro Cell Colony Edge and a CellProfiler Pipeline Cell Colony Counting, and compared them to other open-source digital methods and manual counts. The ImageJ macro Cell Colony Edge is valuable in counting cells and colonies, and measuring their area, volume, morphology, and intensity. In this study, I demonstrate that Cell Colony Edge is superior to other open-source methods, in speed, accuracy and applicability to diverse cellular assays. It can fulfill the need to automate colony/cell counting in high-throughput screens, colony forming assays, and cellular assays.
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Affiliation(s)
- Priya Choudhry
- Department of Chemistry, California Institute of Technology, Pasadena, California, United States of America
- * E-mail:
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35
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Kaifu Y, Kono RT, Sutikna T, Saptomo EW, Jatmiko, Due Awe R. Unique Dental Morphology of Homo floresiensis and Its Evolutionary Implications. PLoS One 2015; 10:e0141614. [PMID: 26624612 PMCID: PMC4651360 DOI: 10.1371/journal.pone.0141614] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 10/09/2015] [Indexed: 01/12/2023] Open
Abstract
Homo floresiensis is an extinct, diminutive hominin species discovered in the Late Pleistocene deposits of Liang Bua cave, Flores, eastern Indonesia. The nature and evolutionary origins of H. floresiensis' unique physical characters have been intensively debated. Based on extensive comparisons using linear metric analyses, crown contour analyses, and other trait-by-trait morphological comparisons, we report here that the dental remains from multiple individuals indicate that H. floresiensis had primitive canine-premolar and advanced molar morphologies, a combination of dental traits unknown in any other hominin species. The primitive aspects are comparable to H. erectus from the Early Pleistocene, whereas some of the molar morphologies are more progressive even compared to those of modern humans. This evidence contradicts the earlier claim of an entirely modern human-like dental morphology of H. floresiensis, while at the same time does not support the hypothesis that H. floresiensis originated from a much older H. habilis or Australopithecus-like small-brained hominin species currently unknown in the Asian fossil record. These results are however consistent with the alternative hypothesis that H. floresiensis derived from an earlier Asian Homo erectus population and experienced substantial body and brain size dwarfism in an isolated insular setting. The dentition of H. floresiensis is not a simple, scaled-down version of earlier hominins.
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Affiliation(s)
- Yousuke Kaifu
- Department of Anthropology, National Museum of Nature and Science, Tokyo, Japan
- Department of Biological Sciences, The University of Tokyo, Tokyo, Japan
| | - Reiko T. Kono
- Department of Anthropology, National Museum of Nature and Science, Tokyo, Japan
| | - Thomas Sutikna
- Centre for Archaeological Science, University of Wollongong, Wollongong, Australia
- The National Research and Development Centre for Archaeology, Jakarta, Indonesia
| | - Emanuel Wahyu Saptomo
- Centre for Archaeological Science, University of Wollongong, Wollongong, Australia
- The National Research and Development Centre for Archaeology, Jakarta, Indonesia
| | - Jatmiko
- Centre for Archaeological Science, University of Wollongong, Wollongong, Australia
- The National Research and Development Centre for Archaeology, Jakarta, Indonesia
| | - Rokus Due Awe
- Centre for Archaeological Science, University of Wollongong, Wollongong, Australia
- The National Research and Development Centre for Archaeology, Jakarta, Indonesia
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Bauer CC, Bons PD, Benazzi S, Harvati K. Using elliptical best fits to characterize dental shapes. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015; 159:342-7. [PMID: 26381860 DOI: 10.1002/ajpa.22866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 11/08/2022]
Abstract
A variety of geometric morphometric methods have recently been used to describe dental shape variation in human evolutionary studies. However, the applicability of these methods is limited when teeth are worn or are difficult to orient accurately. Here we show that elliptical best fits on outlines of dental tissues below the crown provide basic size- and orientation-free shape descriptors. Using the dm(2) and M(3) as examples, we demonstrate that these descriptors can be used for taxonomic purposes, such as distinguishing between Neanderthal and recent modern human teeth. We propose that this approach can be a useful alternative to existing methodology.
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Affiliation(s)
- Catherine C Bauer
- Paleoanthropology, Senckenberg Center for Human Evolution and Paleoecology, Eberhard Karls Universität Tübingen, Rümelinstrasse 23, Tübingen, 72070, Germany
| | - Paul D Bons
- Minerology and Geodynamics, Department of Geosciences, Eberhard Karls Universität Tübingen, Wilhelmstrasse 56, Tübingen, 72074, Germany
| | - Stefano Benazzi
- Department of Cultural Heritage, University of Bologna, via Degli Ariani 1, Ravenna, 48121, Italy.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig, D-04103, Germany
| | - Katerina Harvati
- Paleoanthropology, Senckenberg Center for Human Evolution and Paleoecology, Eberhard Karls Universität Tübingen, Rümelinstrasse 23, Tübingen, 72070, Germany
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37
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Delgado MN, Galbany J, Górka K, Pérez-Pérez A. Taxonomic Implications of Molar Morphology Variability in Capuchins. INT J PRIMATOL 2015. [DOI: 10.1007/s10764-015-9850-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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38
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A geometric morphometric analysis of acetabular shape of the primate hip joint in relation to locomotor behaviour. J Hum Evol 2015; 83:15-27. [DOI: 10.1016/j.jhevol.2015.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 03/20/2015] [Accepted: 03/23/2015] [Indexed: 11/22/2022]
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D'Amore DC. Illustrating ontogenetic change in the dentition of the Nile monitor lizard, Varanus niloticus: a case study in the application of geometric morphometric methods for the quantification of shape-size heterodonty. J Anat 2015; 226:403-19. [PMID: 25939576 DOI: 10.1111/joa.12293] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2015] [Indexed: 12/27/2022] Open
Abstract
Many recent attempts have been made to quantify heterodonty in non-mammalian vertebrates, but the majority of these are limited to Euclidian measurements. One taxon frequently investigated is Varanus niloticus, the Nile monitor. Juveniles possess elongate, pointed teeth (caniniform) along the entirety of the dental arcade, whereas adults develop large, bulbous distal teeth (molariform). The purpose of this study was to present a geometric morphometric method to quantify V. niloticus heterodonty through ontogeny that may be applied to other non-mammalian taxa. Data were collected from the entire tooth row of 19 dry skull specimens. A semilandmark analysis was conducted on the outline of the photographed teeth, and size and shape were derived. Width was also measured with calipers. From these measures, sample ranges and allometric functions were created using multivariate statistical analyses for each tooth position separately, as well as overall measures of heterodonty for each specimen based on morphological disparity. The results confirm and expand upon previous studies, showing measurable shape-size heterodonty in the species with significant differences at each tooth position. Tooth size increases with body size at most positions, and the allometric coefficient increases at more distal positions. Width shows a dramatic increase at the distal positions with ontogeny, often displaying pronounced positive allometry. Dental shape varied in two noticeable ways, with the first composing the vast majority of shape variance: (i) caniniformy vs. molariformy and (ii) mesially leaning, 'rounded' apices vs. distally leaning, 'pointed' apices. The latter was twice as influential in the mandible, a consequence of host bone shape. Mesial teeth show no significant shape change with growth, whereas distal teeth change significantly due primarily to an increase in molariformy. Overall, heterodonty increases with body size concerning both tooth size and shape, but shape heterodonty changes in the mandible are much less pronounced. Although it is unclear to what degree V. niloticus specializes in hard prey items (durophagy), previous studies of varanid feeding behavior, along with research on analogous durophagous vertebrates, indicate a division of labor along the tooth row in adults, due to a possible transition to at least a partial durophagous niche. The geometric morphometric method proposed here, although not without its own limitations, may be ideal for use with a number of dental morphotypes in the future.
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A geometric morphometric analysis of hominin lower molars: Evolutionary implications and overview of postcanine dental variation. J Hum Evol 2015; 82:34-50. [DOI: 10.1016/j.jhevol.2015.02.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 10/05/2014] [Accepted: 02/17/2015] [Indexed: 12/29/2022]
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41
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Schroer K, Wood B. The role of character displacement in the molarization of hominin mandibular premolars. Evolution 2015; 69:1630-1642. [PMID: 25913032 DOI: 10.1111/evo.12672] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 04/21/2015] [Indexed: 11/24/2022]
Abstract
Closely related species are likely to experience resource competition in areas where their ranges overlap. Fossil evidence suggests that hominins in East Africa c. 2-1.5 million years ago may have lived synchronically and sympatrically, and that competition may have contributed to the different tooth sizes observed in Homo and Paranthropus. To assess the likelihood that these taxa overlapped, we applied a character displacement model to the postcanine tooth size of fossil hominins and validated this model in populations of living primates. Mandibular fourth premolar (P4 ) crown size was measured from fossil taxa and from living primate species where dietary overlap is established. Dimensions of the P4 crown were fitted to a character matrix and described as the response variables of a generalized linear model that took taxon and location as input variables. The model recovered significant divergence in samples of closely related, living primates. When applied to fossil hominins the same model detected strong indications of character displacement between early Homo and Paranthropus (P = 0.002) on the basis of their P4 crown size. Our study is an example of how ecologically informed morphologies measured in appropriate extant referents can provide a comparative context for assessing community and ecological evolution in the fossil record.
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Affiliation(s)
- Kes Schroer
- Neukom Institute for Computational Science, Dartmouth, 6047 Silsby Hall, Hanover, New Hampshire, 03755.,Department of Anthropology, Dartmouth, 6047 Silsby Hall, Hanover, New Hampshire, 03755
| | - Bernard Wood
- Center for the Advanced Study of Hominid Paleobiology, The George Washington University, 2110 G St NW, Washington, DC, 20052
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Quam R, Sanz M, Daura J, Robson Brown K, García-González R, Rodríguez L, Dawson H, Rodríguez RF, Gómez S, Villaescusa L, Rubio Á, Yagüe A, Ortega Martínez MC, Fullola JM, Zilhão J, Arsuaga JL. The Neandertals of northeastern Iberia: New remains from the Cova del Gegant (Sitges, Barcelona). J Hum Evol 2015; 81:13-28. [PMID: 25766902 DOI: 10.1016/j.jhevol.2015.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 10/22/2014] [Accepted: 02/05/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Rolf Quam
- Department of Anthropology, Binghamton University (SUNY), Binghamton, NY 13902-6000, USA; Centro UCM-ISCIII de Investigación sobre la Evolución y Comportamiento Humanos, Avda. Monforte de Lemos, 5, 28029 Madrid, Spain; Division of Anthropology, American Museum of Natural History, Central Park West at 79th St., New York, NY 10024-5192, USA.
| | - Montserrat Sanz
- Grup de Recerca del Quaternari-Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain
| | - Joan Daura
- Grup de Recerca del Quaternari-Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain
| | - Kate Robson Brown
- Department of Archaeology and Anthropology, University of Bristol, 43 Woodland Road, Bristol BS8 1UU, UK
| | - Rebeca García-González
- Departamento de Ciencias Históricas y Geografía, Universidad de Burgos, Facultad de Humanidades y Educación, 09001 Burgos, Spain
| | - Laura Rodríguez
- Departamento de Ciencias Históricas y Geografía, Universidad de Burgos, Facultad de Humanidades y Educación, 09001 Burgos, Spain; Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Paseo Sierra de Atapuerca s/n, 09002 Burgos, Spain
| | - Heidi Dawson
- Department of Archaeology and Anthropology, University of Bristol, 43 Woodland Road, Bristol BS8 1UU, UK
| | - Rosa Flor Rodríguez
- Grup de Recerca del Quaternari-Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain
| | - Sandra Gómez
- Grup de Recerca del Quaternari-Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain
| | - Lucía Villaescusa
- Grup de Recerca del Quaternari-Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain
| | - Ángel Rubio
- Grup de Recerca del Quaternari-Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain; Laboratorio de Antropología, Depto de Medicina Legal, Toxicología y Antropología Física, Facultad de Medicina, Universidad de Granada, Av de Madrid, 11, 18012 Granada, Spain
| | - Almudena Yagüe
- Grup de Recerca del Quaternari-Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain
| | - María Cruz Ortega Martínez
- Centro UCM-ISCIII de Investigación sobre la Evolución y Comportamiento Humanos, Avda. Monforte de Lemos, 5, 28029 Madrid, Spain
| | - Josep Maria Fullola
- Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain
| | - João Zilhão
- Seminari d'Estudis i Recerques Prehistòriques, Dept. Prehistòria, H. Antiga i Arqueologia, Facultat de Geografia i Història, Universitat de Barcelona, C/Montalegre, 6, 08001 Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08010 Barcelona, Spain
| | - Juan Luis Arsuaga
- Centro UCM-ISCIII de Investigación sobre la Evolución y Comportamiento Humanos, Avda. Monforte de Lemos, 5, 28029 Madrid, Spain; Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Haile-Selassie Y, Melillo SM. Middle Pliocene hominin mandibular fourth premolars from Woranso-Mille (Central Afar, Ethiopia). J Hum Evol 2015; 78:44-59. [DOI: 10.1016/j.jhevol.2014.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 08/11/2014] [Accepted: 08/11/2014] [Indexed: 11/16/2022]
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Xing S, Martinón-Torres M, Bermúdez de Castro JM, Zhang Y, Fan X, Zheng L, Huang W, Liu W. Middle Pleistocene hominin teeth from Longtan Cave, Hexian, China. PLoS One 2014; 9:e114265. [PMID: 25551383 PMCID: PMC4281145 DOI: 10.1371/journal.pone.0114265] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 11/04/2014] [Indexed: 11/24/2022] Open
Abstract
Excavations at the Longtan Cave, Hexian, Anhui Province of Eastern China, have yielded several hominin fossils including crania, mandibular fragments, and teeth currently dated to 412 ± 25 ka. While previous studies have focused on the cranial remains, there are no detailed analyses of the dental evidence. In this study, we provide metric and morphological descriptions and comparisons of ten teeth recovered from Hexian, including microcomputed tomography analyses. Our results indicate that the Hexian teeth are metrically and morphologically primitive and overlap with H. ergaster and East Asian Early and mid-Middle Pleistocene hominins in their large dimensions and occlusal complexities. However, the Hexian teeth differ from H. ergaster in features such as conspicuous vertical grooves on the labial/buccal surfaces of the central incisor and the upper premolar, the crown outline shapes of upper and lower molars and the numbers, shapes, and divergences of the roots. Despite their close geological ages, the Hexian teeth are also more primitive than Zhoukoudian specimens, and resemble Sangiran Early Pleistocene teeth. In addition, no typical Neanderthal features have been identified in the Hexian sample. Our study highlights the metrical and morphological primitive status of the Hexian sample in comparison to contemporaneous or even earlier populations of Asia. Based on this finding, we suggest that the primitive-derived gradients of the Asian hominins cannot be satisfactorily fitted along a chronological sequence, suggesting complex evolutionary scenarios with the coexistence and/or survival of different lineages in Eurasia. Hexian could represent the persistence in time of a H. erectus group that would have retained primitive features that were lost in other Asian populations such as Zhoukoudian or Panxian Dadong. Our study expands the metrical and morphological variations known for the East Asian hominins before the mid-Middle Pleistocene and warns about the possibility that the Asian hominin variability may have been taxonomically oversimplified.
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Affiliation(s)
- Song Xing
- Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
| | | | | | - Yingqi Zhang
- Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
| | | | | | - Wanbo Huang
- Chongqing Three Gorges Institute of Paleoanthropology, China Three Gorges Museum, Chongqing, China
| | - Wu Liu
- Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China
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45
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Xing S, Martinón-Torres M, Bermúdez de Castro JM, Wu X, Liu W. Hominin teeth from the early Late Pleistocene site of Xujiayao, Northern China. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2014; 156:224-40. [DOI: 10.1002/ajpa.22641] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 10/06/2014] [Accepted: 10/07/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Song Xing
- Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences; Beijing 100044 China
| | - María Martinón-Torres
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH); Burgos 09002 Spain
| | | | - Xiujie Wu
- Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences; Beijing 100044 China
| | - Wu Liu
- Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences; Beijing 100044 China
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46
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Metric and geometric morphometric analysis of new hominin fossils from Maba (Guangdong, China). J Hum Evol 2014; 74:1-20. [DOI: 10.1016/j.jhevol.2014.04.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 02/26/2014] [Accepted: 04/07/2014] [Indexed: 01/15/2023]
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47
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Brook AH, Jernvall J, Smith RN, Hughes TE, Townsend GC. The dentition: the outcomes of morphogenesis leading to variations of tooth number, size and shape. Aust Dent J 2014; 59 Suppl 1:131-42. [DOI: 10.1111/adj.12160] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- AH Brook
- School of Dentistry; The University of Adelaide; South Australia Australia
- Institute of Dentistry; Queen Mary University of London; United Kingdom
| | - J Jernvall
- Institute of Biotechnology; University of Helsinki; Finland
| | - RN Smith
- School of Dentistry; University of Liverpool; Liverpool United Kingdom
| | - TE Hughes
- School of Dentistry; The University of Adelaide; South Australia Australia
| | - GC Townsend
- School of Dentistry; The University of Adelaide; South Australia Australia
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48
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Luminescence dating and palaeomagnetic age constraint on hominins from Sima de los Huesos, Atapuerca, Spain. J Hum Evol 2014; 67:85-107. [DOI: 10.1016/j.jhevol.2013.12.001] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 12/17/2013] [Accepted: 12/17/2013] [Indexed: 01/03/2023]
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49
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Bailey SE, Benazzi S, Hublin JJ. Allometry, merism, and tooth shape of the upper deciduous M2 and permanent M1. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2014; 154:104-14. [DOI: 10.1002/ajpa.22477] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 01/14/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Shara E. Bailey
- Department of Anthropology; Center for the Study of Human Origins, New York University; New York NY 10003
- Department of Human Evolution; Max Planck Institute for Evolutionary Anthropology; Leipzig D-04103 Germany
| | - Stefano Benazzi
- Department of Human Evolution; Max Planck Institute for Evolutionary Anthropology; Leipzig D-04103 Germany
| | - Jean-Jacques Hublin
- Department of Human Evolution; Max Planck Institute for Evolutionary Anthropology; Leipzig D-04103 Germany
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50
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Kenyhercz MW, Klales AR, Kenyhercz WE. Molar size and shape in the estimation of biological ancestry: A comparison of relative cusp location using geometric morphometrics and interlandmark distances. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 153:269-79. [DOI: 10.1002/ajpa.22429] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 11/03/2013] [Indexed: 11/05/2022]
Affiliation(s)
| | - Alexandra R. Klales
- Department of Anthropology; University of Manitoba; Manitoba MB R3T 5V5 Canada
- Department of Anthropology; Dickinson College; Carlisle PA 17013
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