1
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Higgins OA, Modi A, Cannariato C, Diroma MA, Lugli F, Ricci S, Zaro V, Vai S, Vazzana A, Romandini M, Yu H, Boschin F, Magnone L, Rossini M, Di Domenico G, Baruffaldi F, Oxilia G, Bortolini E, Dellù E, Moroni A, Ronchitelli A, Talamo S, Müller W, Calattini M, Nava A, Posth C, Lari M, Bondioli L, Benazzi S, Caramelli D. Life history and ancestry of the late Upper Palaeolithic infant from Grotta delle Mura, Italy. Nat Commun 2024; 15:8248. [PMID: 39304646 PMCID: PMC11415373 DOI: 10.1038/s41467-024-51150-x] [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: 07/14/2023] [Accepted: 07/30/2024] [Indexed: 09/22/2024] Open
Abstract
The biological aspects of infancy within late Upper Palaeolithic populations and the role of southern refugia at the end of the Last Glacial Maximum are not yet fully understood. This study presents a multidisciplinary, high temporal resolution investigation of an Upper Palaeolithic infant from Grotta delle Mura (Apulia, southern Italy) combining palaeogenomics, dental palaeohistology, spatially-resolved geochemical analyses, direct radiocarbon dating, and traditional anthropological studies. The skeletal remains of the infant - Le Mura 1 - were directly dated to 17,320-16,910 cal BP. The results portray a biological history of the infant's development, early life, health and death (estimated at ~72 weeks). They identify, several phenotypic traits and a potential congenital disease in the infant, the mother's low mobility during gestation, and a high level of endogamy. Furthermore, the genomic data indicates an early spread of the Villabruna-like components along the Italian peninsula, confirming a population turnover around the time of the Last Glacial Maximum, and highlighting a general reduction in genetic variability from northern to southern Italy. Overall, Le Mura 1 contributes to our better understanding of the early stages of life and the genetic puzzle in the Italian peninsula at the end of the Last Glacial Maximum.
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Affiliation(s)
- Owen Alexander Higgins
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy.
- Department of Odontostomatological and Maxillofacial Sciences, Sapienza University of Rome, Rome, Italy.
| | - Alessandra Modi
- Department of Biology, University of Florence, Florence, Italy.
| | | | | | - Federico Lugli
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Stefano Ricci
- Department of Physical Sciences, Earth and Environment - RU of Prehistory and Anthropology, University of Siena, Siena, Italy
| | - Valentina Zaro
- Department of Biology, University of Florence, Florence, Italy
| | - Stefania Vai
- Department of Biology, University of Florence, Florence, Italy
| | - Antonino Vazzana
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Matteo Romandini
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - He Yu
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Francesco Boschin
- Department of Physical Sciences, Earth and Environment - RU of Prehistory and Anthropology, University of Siena, Siena, Italy
| | - Luigi Magnone
- Department of Physical Sciences, Earth and Environment - RU of Prehistory and Anthropology, University of Siena, Siena, Italy
| | - Matteo Rossini
- Department of Physical Sciences, Earth and Environment - RU of Prehistory and Anthropology, University of Siena, Siena, Italy
| | | | - Fabio Baruffaldi
- Laboratory of Medical Technology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Gregorio Oxilia
- Department of Translational Medicine and for Romagna, University of Ferrara, Ferrara, Italy
| | - Eugenio Bortolini
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - Elena Dellù
- Institute Villa Adriana e Villa d'Este, Superintendence of Archeology, Fine Arts and Landscape for the metropolitan city of Bari - Ministry of Culture, Bari, Italy
| | - Adriana Moroni
- Department of Physical Sciences, Earth and Environment - RU of Prehistory and Anthropology, University of Siena, Siena, Italy
| | - Annamaria Ronchitelli
- Department of Physical Sciences, Earth and Environment - RU of Prehistory and Anthropology, University of Siena, Siena, Italy
| | - Sahra Talamo
- Department of Chemistry G. Ciamician, University of Bologna, Bologna, Italy
- Department of Archaeogenetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Wolfgang Müller
- Institut für Geowissenschaften, Goethe-Universität Frankfurt, Frankfurt am Main, Germany
- Frankfurt Isotope and Element Research Center (FIERCE), Goethe University Frankfurt, Frankfurt, Frankfurt am Main, Germany
| | - Mauro Calattini
- Department of History and Cultural Heritage, University of Siena, Siena, Italy
| | - Alessia Nava
- Department of Odontostomatological and Maxillofacial Sciences, Sapienza University of Rome, Rome, Italy
| | - Cosimo Posth
- Archaeo- and Palaeogenetics, Institute for Archaeological Sciences, Department of Geosciences, University of Tübingen, Tübingen, Germany
- Senckenberg Centre for Human Evolution and Palaeoenvironment at the University of Tübingen, Tübingen, Germany
| | - Martina Lari
- Department of Biology, University of Florence, Florence, Italy
| | - Luca Bondioli
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
- Department of Cultural Heritage, University of Padua, Padova, Italy
| | - Stefano Benazzi
- Department of Cultural Heritage, University of Bologna, Ravenna, Italy
| | - David Caramelli
- Department of Biology, University of Florence, Florence, Italy
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Kenessey DE, Stojanowski CM, Paul KS. Evaluating predictions of the patterning cascade model of crown morphogenesis in the human lower mixed and permanent dentition. PLoS One 2024; 19:e0304455. [PMID: 38935640 PMCID: PMC11210800 DOI: 10.1371/journal.pone.0304455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 05/13/2024] [Indexed: 06/29/2024] Open
Abstract
OBJECTIVE The patterning cascade model of crown morphogenesis has been studied extensively in a variety of organisms to elucidate the evolutionary history surrounding postcanine tooth form. The current research is the first to use a large modern human sample to examine whether the crown configuration of lower deciduous and permanent molars aligns with expectations derived from the model. This study has two main goals: 1) to determine if metameric and antimeric pairs significantly differ in size, accessory trait expression, and relative intercusp spacing, and 2) assess whether the relative distance among early-forming cusps accounts for observed variation in accessory cusp expression. METHODS Tooth size, intercusp distance, and morphological trait expression data were collected from 3D scans of mandibular dental casts representing participants of the Harvard Solomon Islands Project. Paired tests were utilized to compare tooth size, accessory trait expression, and relative intercusp distance between diphyodont metameres and permanent antimeres. Proportional odds logistic regression was implemented to investigate how the odds of greater accessory cusp expression vary as a function of the distance between early-developing cusps. RESULTS/SIGNIFICANCE Comparing paired molars, significant differences were identified for tooth size and cusp 5 expression. Several relative intercusp distances emerged as important predictors of cusp 6 expression, however, results for cusp 5 and cusp 7 did not match expected patterns. These findings support previous quantitative genetic results and suggest the development of neighboring crown structures represents a zero-sum partitioning of cellular territory and resources. As such, this study contributes to a better understanding of the foundations of deciduous and permanent molar crown variation in humans.
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Affiliation(s)
- Dori E. Kenessey
- Department of Anthropology, U niversity of Nevada, Reno, Nevada, United States of America
| | - Christopher M. Stojanowski
- Center for Bioarchaeological Research, School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, United States of America
| | - Kathleen S. Paul
- Department of Anthropology, University of Arkansas, Fayetteville, Arkansas, United States of America
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Stuhlträger J, Kullmer O, Wittig RM, Kupczik K, Schulz-Kornas E. Variability in molar crown morphology and cusp wear in two Western chimpanzee populations. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2023; 181:29-44. [PMID: 36807569 DOI: 10.1002/ajpa.24707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 01/11/2023] [Accepted: 01/24/2023] [Indexed: 02/23/2023]
Abstract
OBJECTIVES Chimpanzees (Pan troglodytes) possess a relatively generalized molar morphology allowing them to access a wide range of foods. Comparisons of crown and cusp morphology among the four subspecies have suggested relatively large intraspecific variability. Here, we compare molar crown traits and cusp wear of two geographically close populations of Western chimpanzees, P. t. verus, to provide further information on intraspecific dental variability. MATERIALS AND METHODS Micro-CT reconstructions of high-resolution replicas of first and second molars of two Western chimpanzee populations from Ivory Coast (Taï National Park) and Liberia, respectively were used for this study. First, we analyzed projected tooth and cusp 2D areas as well as the occurrence of cusp six (C6) on lower molars. Second, we quantified the molar cusp wear three-dimensionally to infer how the individual cusps alter with advancing wear. RESULTS Both populations are similar in their molar crown morphology, except for a higher appearance rate of a C6 in Taï chimpanzees. In Taï chimpanzees, lingual cusps of upper molars and buccal cusps of lower molars possess an advanced wear pattern compared to the remaining cusps, while in Liberian chimpanzees this wear gradient is less pronounced. DISCUSSION The similar crown morphology between both populations fits with previous descriptions for Western chimpanzees and provides additional data on dental variation within this subspecies. The wear pattern of the Taï chimpanzees are in concordance with their observed tool rather than tooth use to open nuts/seeds, while the Liberian chimpanzees may have consumed hard food items crushed between their molars.
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Affiliation(s)
- Julia Stuhlträger
- Former Max Planck Weizmann Center for Integrative Archaeology and Anthropology, Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Group Animal Husbandry and Ecology, Group Animal Breeding, Institute of Agricultural and Nutritional Sciences, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Ottmar Kullmer
- Division of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt am Main, Germany
- Department of Paleobiology and Environment, Institute of Ecology, Evolution, and Diversity, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Roman M Wittig
- Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Taï Chimpanzee Project, CSRS, Abidjan, Ivory Coast
- Institute for Cognitive Sciences, CNRS UMR5229 University Claude Bernard Lyon 1, Bron, France
| | - Kornelius Kupczik
- Former Max Planck Weizmann Center for Integrative Archaeology and Anthropology, Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Department of Anthropology, Faculty of Social Sciences, University of Chile, Santiago de Chile, Chile
| | - Ellen Schulz-Kornas
- Former Max Planck Weizmann Center for Integrative Archaeology and Anthropology, Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- Department of Cariology, Endodontics and Periodontology, University of Leipzig, Leipzig, Germany
- Section Mammalogy and Palaeoanthropology, Leibniz Institute for the Analysis of Biodiversity Change and University of Hamburg, Hamburg, Germany
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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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5
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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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Ortiz A, Schander-Triplett K, Bailey SE, Skinner MM, Hublin JJ, Schwartz GT. Enamel thickness variation in the deciduous dentition of extant large-bodied hominoids. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2020; 173:500-513. [PMID: 32767577 DOI: 10.1002/ajpa.24106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 05/16/2020] [Accepted: 06/11/2020] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Enamel thickness features prominently in hominoid evolutionary studies. To date, however, studies of enamel thickness in humans, great apes, and their fossil relatives have focused on the permanent molar row. Comparatively little research effort has been devoted to tissue proportions within deciduous teeth. Here we attempt to fill this gap by documenting enamel thickness variation in the deciduous dentition of extant large-bodied hominoids. MATERIALS AND METHODS We used microcomputed tomography to image dental tissues in 80 maxillary and 78 mandibular deciduous premolars of Homo sapiens, Pan troglodytes, Gorilla, and Pongo. Two-dimensional virtual sections were created from the image volumes to quantify average (AET) and relative (RET) enamel thickness, as well as its distribution across the crown. RESULTS Our results reveal no significant differences in enamel thickness among the great apes. Unlike the pattern present in permanent molars, Pongo does not stand out as having relatively thicker-enameled deciduous premolars than P. troglodytes and Gorilla. Humans, on the other hand, possess significantly thicker deciduous premolar enamel in comparison to great apes. Following expectations from masticatory biomechanics, we also find that the "functional" side (protocone, protoconid) of deciduous premolars generally possesses thicker enamel than the "nonfunctional" side. DISCUSSION Our study lends empirical support to anecdotal observations that patterns of AET and RET observed for permanent molars of large-bodied apes do not apply to deciduous premolars. By documenting enamel thickness variation in hominoid deciduous teeth, this study provides the comparative context to interpret rates and patterns of wear of deciduous teeth and their utility in life history reconstructions.
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Affiliation(s)
- Alejandra Ortiz
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, USA.,Center for the Study of Human Origins, Department of Anthropology, New York University, New York, New York, USA
| | - Katherine Schander-Triplett
- Barrett, The Honors College, College of Liberal Arts and Sciences, Arizona State University, Tempe, Arizona, USA
| | - Shara E Bailey
- Center for the Study of Human Origins, Department of Anthropology, New York University, New York, New York, USA.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Matthew M Skinner
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.,School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Jean-Jacques Hublin
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.,Collège de France, Paris, France
| | - Gary T Schwartz
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, USA
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Fiorenza L, Menter CG, Fung S, Lee J, Kaidonis J, Moggi-Cecchi J, Townsend G, Kullmer O. The functional role of the Carabelli trait in early and late hominins. J Hum Evol 2020; 145:102816. [PMID: 32580080 DOI: 10.1016/j.jhevol.2020.102816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/17/2020] [Accepted: 04/17/2020] [Indexed: 01/04/2023]
Abstract
The Carabelli trait is a dental feature that forms along the lingual margin of the protocone of deciduous and permanent maxillary molars. It is variably expressed, ranging from a small pit or furrow to a large cusp, and its development seems to be associated with crown size and molar cusp spatial configuration. The degree of expression of the Carabelli trait differs systematically between hominin taxa, and for this reason, it has been used extensively in the reconstruction of their phylogeny. However, the functional implications of having a large Carabelli trait remain unclear. In this study, we analyze the macrowear pattern of maxillary molars of early and late hominins using the occlusal fingerprint analysis method, an approach based on digital models of teeth that helps in reconstructing occlusal dynamics occurring during mastication. Tooth crowns with a small Carabelli cusp generally exhibit larger wear contact areas that extended cervically, while two additional new occlusal contact areas are common in teeth characterized by a large Carabelli cusp. These wear areas are created at the beginning of the chewing cycle, when occluding with the slopes of the lingual groove of the lower molars, between the metaconid and entoconid cusps. Advancing tooth wear leads to a slight enlargement of Carabelli occlusal contacts increasing their functional area. A steep inclination could be mechanically important in food reduction and in balancing the functional load distribution during mastication contacts. Steep wear areas are particularly developed in primates that process foods characterized by tough and fibrous textural properties. Future biomechanical and microwear texture analyses could provide additional information on the mechanical adaptation of this dental trait.
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Affiliation(s)
- Luca Fiorenza
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, VIC, 3800, Australia; Earth Sciences, University of New England, Armidale, NSW, 2351, Australia.
| | - Colin G Menter
- Department of Biology, University of Florence, 50122, Firenze, Italy
| | - Sarah Fung
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, VIC, 3800, Australia
| | - Jinyoung Lee
- Department of Anatomy and Developmental Biology, Monash University, Melbourne, VIC, 3800, Australia
| | - John Kaidonis
- Adelaide Dental School, University of Adelaide, Adelaide, SA, 5005, Australia
| | | | - Grant Townsend
- Adelaide Dental School, University of Adelaide, Adelaide, SA, 5005, Australia
| | - Ottmar Kullmer
- Department of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Senckenberganlage 25, 60325 Frankfurt a. M., Germany; Department of Paleobiology and Environment, Institute of Ecology, Evolution, and Diversity, Johann Wolfgang Goethe University, Max-von-Laue-Str. 13, 60438, Frankfurt, Germany
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8
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Bailey SE, Brophy JK, Moggi-Cecchi J, Delezene LK. The deciduous dentition of Homo naledi: A comparative study. J Hum Evol 2019; 136:102655. [DOI: 10.1016/j.jhevol.2019.102655] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 08/06/2019] [Accepted: 08/08/2019] [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: Discrete traits at the enamel-dentine junction. J Hum Evol 2019; 136:102670. [DOI: 10.1016/j.jhevol.2019.102670] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 09/06/2019] [Accepted: 09/06/2019] [Indexed: 12/20/2022]
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10
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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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Radović P, Lindal J, Mihailović D, Roksandic M. The first Neanderthal specimen from Serbia: Maxillary first molar from the Late Pleistocene of Pešturina Cave. J Hum Evol 2019; 131:139-151. [DOI: 10.1016/j.jhevol.2019.03.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 12/18/2022]
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12
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Liao W, Xing S, Li D, Martinón-Torres M, Wu X, Soligo C, Bermúdez de Castro JM, Wang W, Liu W. Mosaic dental morphology in a terminal Pleistocene hominin from Dushan Cave in southern China. Sci Rep 2019; 9:2347. [PMID: 30787352 PMCID: PMC6382942 DOI: 10.1038/s41598-019-38818-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 12/18/2018] [Indexed: 12/27/2022] Open
Abstract
Recent studies reveal high degrees of morphological diversity in Late Pleistocene humans from East Asia. This variability was interpreted as complex demographic patterns with several migrations and possible survival of archaic groups. However, lack of well-described, reliably classified and accurately dated sites has seriously limited understanding of human evolution in terminal Pleistocene. Here we report a 15,000 years-old H. sapiens (Dushan 1) in South China with unusual mosaic features, such as large dental dimensions, cingulum-like structures at the dentine level in the posterior dentition and expression of a "crown buccal vertical groove complex", all of which are uncommon in modern humans and more typically found in Middle Pleistocene archaic humans. They could represent the late survival of one of the earliest modern humans to settle in an isolated region of southern China and, hence, the retention of primitive-like traits. They could also represent a particularity of this group and, hence, reflect a high degree of regional variation. Alternatively, these features may be the result of introgression from some late-surviving archaic population in the region. Our study demonstrates the extreme variability of terminal Pleistocene populations in China and the possibility of a complex demographic story in the region.
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Affiliation(s)
- Wei Liao
- State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China
- Anthropology Museum of Guangxi, Nanning, 530028, Guangxi, China
| | - 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
- CAS Center for Excellence in Life and Paleoenvironment, Beijing, 100044, China
| | - Dawei Li
- State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China
- Anthropology Museum of Guangxi, Nanning, 530028, Guangxi, China
| | - María Martinón-Torres
- Department of Anthropology, University College London (UCL), 14 Taviton Street, London, WC1H 0BW, UK
- National Research Center on Human Evolution (CENIEH), Paseo Sierra de Atapuerca s/n, 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
- CAS Center for Excellence in Life and Paleoenvironment, Beijing, 100044, China
| | - Christophe Soligo
- Department of Anthropology, University College London (UCL), 14 Taviton Street, London, WC1H 0BW, UK
| | - José María Bermúdez de Castro
- Department of Anthropology, University College London (UCL), 14 Taviton Street, London, WC1H 0BW, UK
- National Research Center on Human Evolution (CENIEH), Paseo Sierra de Atapuerca s/n, Burgos, 09002, Spain
| | - Wei Wang
- Institute of Cultural Heritage, Shandong University, 72 Jimo-Binhai Road, Qingdao, 266237, 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.
- CAS Center for Excellence in Life and Paleoenvironment, Beijing, 100044, China.
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13
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New permanent teeth from Gran Dolina-TD6 (Sierra de Atapuerca). The bearing of Homo antecessor on the evolutionary scenario of Early and Middle Pleistocene Europe. J Hum Evol 2019; 127:93-117. [DOI: 10.1016/j.jhevol.2018.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 12/02/2018] [Accepted: 12/04/2018] [Indexed: 11/19/2022]
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14
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Khudaverdyan AY. Illuminating the processes of microevolution: A bioarchaeological analysis of dental non-metric traits from Armenian Highland. HOMO-JOURNAL OF COMPARATIVE HUMAN BIOLOGY 2018; 69:304-323. [PMID: 30409395 DOI: 10.1016/j.jchb.2018.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 10/07/2018] [Indexed: 10/28/2022]
Abstract
Non-metric dental traits provide useful information for assessing temporal changes as well as for assessing biological relationships among living and ancient populations. Dental morphological traits were employed in this study as direct indicators of biological affinities among the populations that inhabited the Armenian Highland from the Late Chalcolithic-Early Bronze Age to Modern times. Sixteen morphological features in 2643 permanent adult teeth from 41 samples coming from 5 areas within the Armenian Highland were scored. Both Zubov's standard protocol and Turner's ASUDAS were employed. Given the paucity of odontological data for this area, this study contributes to the dental non-metric traits' history of Armenian Highland and is a summary compilation and comparison of previously conducted work where non-metric traits were used in relation to dental reductions within the ancient Caucasus and Near East. The chronological sequence is considerable and spans from the Late Chalcolithic-Bronze Age to the Modern Age. It is suggested that offspring of ancient inhabitants of Armenian Highland continued to inhabit this area during the Late Iron Age, Classical/Late Antiquity, Middle Age and Modern period. This scenario indicates genetic continuity and gene flow between populations. Such a perspective is supported by the archaeological and molecular findings.
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Affiliation(s)
- A Yu Khudaverdyan
- Institute of Archaeology and Ethnography, National Academy of Science, Republic of Armenia, 0025 Yerevan, Charents st.15, Armenia.
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15
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Zanolli C, Martinón-Torres M, Bernardini F, Boschian G, Coppa A, Dreossi D, Mancini L, Martínez de Pinillos M, Martín-Francés L, Bermúdez de Castro JM, Tozzi C, Tuniz C, Macchiarelli R. The Middle Pleistocene (MIS 12) human dental remains from Fontana Ranuccio (Latium) and Visogliano (Friuli-Venezia Giulia), Italy. A comparative high resolution endostructural assessment. PLoS One 2018; 13:e0189773. [PMID: 30281595 PMCID: PMC6169847 DOI: 10.1371/journal.pone.0189773] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 07/16/2018] [Indexed: 12/17/2022] Open
Abstract
The penecontemporaneous Middle Pleistocene sites of Fontana Ranuccio (Latium) and Visogliano (Friuli-Venezia Giulia), set c. 450 km apart in central and northeastern Italy, respectively, have yielded some among the oldest human fossil remains testifying to a peopling phase of the Italian Peninsula broadly during the glacial MIS 12, a stage associated with one among the harshest climatic conditions in the Northern hemisphere during the entire Quaternary period. Together with the large samples from Atapuerca Sima de los Huesos, Spain, and Caune de l’Arago at Tautavel, France, the remains from Fontana Ranuccio and Visogliano are among the few mid-Middle Pleistocene dental assemblages from Western Europe available for investigating the presence of an early Neanderthal signature in their inner structure. We applied two- three-dimensional techniques of virtual imaging and geometric morphometrics to the high-resolution X-ray microtomography record of the dental remains from these two Italian sites and compared the results to the evidence from a selected number of Pleistocene and extant human specimens/samples from Europe and North Africa. Depending on their preservation quality and on the degree of occlusal wear, we comparatively assessed: (i) the crown enamel and radicular dentine thickness topographic variation of a uniquely represented lower incisor; (ii) the lateral crown tissue proportions of premolars and molars; (iii) the enamel-dentine junction, and (iv) the pulp cavity morphology of all available specimens. Our analyses reveal in both samples a Neanderthal-like inner structural signal, for some aspects also resembling the condition shown by the contemporary assemblage from Atapuerca SH, and clearly distinct from the recent human figures. This study provides additional evidence indicating that an overall Neanderthal morphological dental template was preconfigured in Western Europe at least 430 to 450 ka ago.
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Affiliation(s)
- Clément Zanolli
- Laboratoire AMIS, UMR 5288 CNRS, Université Toulouse III Paul Sabatier, Toulouse, France
- * E-mail:
| | - María Martinón-Torres
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain
- Department of Anthropology, University College London (UCL), London, United Kingdom
| | - Federico Bernardini
- Centro Fermi, Museo Storico della Fisica e Centro di Studi e Ricerche "Enrico Fermi", Rome, Italy
- Multidisciplinary Laboratory, The "Abdus Salam" International Centre for Theoretical Physics, Trieste, Italy
| | - Giovanni Boschian
- Dipartimento di Civiltà e Forme del Sapere, Università di Pisa, Pisa, Italy
| | - Alfredo Coppa
- Dipartimento di Biologia Ambientale, Università di Roma "La Sapienza", Rome, Italy
| | - Diego Dreossi
- SYRMEP Group, Elettra-Sincrotrone Trieste S.C.p.A., Basovizza (Trieste), Italy
| | - Lucia Mancini
- SYRMEP Group, Elettra-Sincrotrone Trieste S.C.p.A., Basovizza (Trieste), Italy
| | - Marina Martínez de Pinillos
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain
- Department of Anthropology, University College London (UCL), London, United Kingdom
| | - Laura Martín-Francés
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain
- Laboratoire PACEA, UMR 5199, Université de Bordeaux, Bordeaux, France
| | - José María Bermúdez de Castro
- Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Burgos, Spain
- Department of Anthropology, University College London (UCL), London, United Kingdom
| | - Carlo Tozzi
- Dipartimento di Civiltà e Forme del Sapere, Università di Pisa, Pisa, Italy
| | - Claudio Tuniz
- Centro Fermi, Museo Storico della Fisica e Centro di Studi e Ricerche "Enrico Fermi", Rome, Italy
- Multidisciplinary Laboratory, The "Abdus Salam" International Centre for Theoretical Physics, Trieste, Italy
- Centre for Archaeological Science, University of Wollongong, Wollongong, Australia
| | - Roberto Macchiarelli
- Laboratoire HNHP, UMR 7194 CNRS, Muséum national d'Histoire naturelle (MNHN), Paris, France
- Unité de Formation Géosciences, Université de Poitiers, Poitiers, France
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16
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Selig KR, López-Torres S, Sargis EJ, Silcox MT. First 3D Dental Topographic Analysis of the Enamel-Dentine Junction in Non-Primate Euarchontans: Contribution of the Enamel-Dentine Junction to Molar Morphology. J MAMM EVOL 2018. [DOI: 10.1007/s10914-018-9440-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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17
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Ortiz A, Bailey SE, Schwartz GT, Hublin JJ, Skinner MM. Evo-devo models of tooth development and the origin of hominoid molar diversity. SCIENCE ADVANCES 2018; 4:eaar2334. [PMID: 29651459 PMCID: PMC5895448 DOI: 10.1126/sciadv.aar2334] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 02/28/2018] [Indexed: 06/08/2023]
Abstract
The detailed anatomical features that characterize fossil hominin molars figure prominently in the reconstruction of their taxonomy, phylogeny, and paleobiology. Despite the prominence of molar form in human origins research, the underlying developmental mechanisms generating the diversity of tooth crown features remain poorly understood. A model of tooth morphogenesis-the patterning cascade model (PCM)-provides a developmental framework to explore how and why the varying molar morphologies arose throughout human evolution. We generated virtual maps of the inner enamel epithelium-an indelibly preserved record of enamel knot arrangement-in 17 living and fossil hominoid species to investigate whether the PCM explains the expression of all major accessory cusps. We found that most of the variation and evolutionary changes in hominoid molar morphology followed the general developmental rule shared by all mammals, outlined by the PCM. Our results have implications for the accurate interpretation of molar crown configuration in hominoid systematics.
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Affiliation(s)
- Alejandra Ortiz
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA
| | - Shara E. Bailey
- Center for the Study of Human Origins, Department of Anthropology, New York University, New York, NY 10003, USA
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig 04103, Germany
| | - Gary T. Schwartz
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA
| | - Jean-Jacques Hublin
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig 04103, Germany
| | - Matthew M. Skinner
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig 04103, Germany
- School of Anthropology and Conservation, University of Kent, Canterbury CT2 7NR, UK
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18
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Zanolli C, Pan L, Dumoncel J, Kullmer O, Kundrát M, Liu W, Macchiarelli R, Mancini L, Schrenk F, Tuniz C. Inner tooth morphology of Homo erectus from Zhoukoudian. New evidence from an old collection housed at Uppsala University, Sweden. J Hum Evol 2018; 116:1-13. [DOI: 10.1016/j.jhevol.2017.11.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 10/31/2017] [Accepted: 11/02/2017] [Indexed: 01/10/2023]
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19
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Sova SS, Tjäderhane L, Heikkilä PA, Jernvall J. A microCT Study of Three-Dimensional Patterns of Biomineralization in Pig Molars. Front Physiol 2018; 9:71. [PMID: 29479320 PMCID: PMC5811547 DOI: 10.3389/fphys.2018.00071] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 01/19/2018] [Indexed: 11/15/2022] Open
Abstract
Domestic pig molars provide an interesting system to study the biomineralization process. The large size, thick enamel and complex crown morphology make pig molars relatively similar to human molars. However, compared to human molars, pig molars develop considerably faster. Here we use microCT to image the developing pig molars and to decipher spatial patterns of biomineralization. We used mineral grains to calibrate individual microCT-scans, which allowed an accurate measure of the electron density of the developing molars. The microCT results show that unerupted molars that are morphologically at the same stage of development, can be at markedly different stage of enamel biomineralization. Erupted molars show increased electron density, suggesting that mineralization continues in oral cavity. Yet, our comparisons show that human enamel has slightly higher electron density than pig enamel. These results support the relatively low hardness values and calcium level values that have been reported earlier in literature for pig teeth. The mineral calibration was an efficient method for the microCT-absorption models, allowing a relatively robust way to detect scanning artifacts. In conclusions, whereas thin sections remain the preferred way to analyze enamel features, such as incremental lines and crystal orientation, the microCT allows efficient and non-destructive comparisons between different teeth and species.
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Affiliation(s)
- Susanna S Sova
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland.,Department of Geoscience and Geography, University of Helsinki, Helsinki, Finland
| | - Leo Tjäderhane
- Department of Oral and Maxillofacial Diseases, Helsinki University Hospital, University of Helsinki, Helsinki, Finland.,Institute of Dentistry and Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Oulu, Finland
| | - Pasi A Heikkilä
- Department of Geoscience and Geography, University of Helsinki, Helsinki, Finland
| | - Jukka Jernvall
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, Helsinki, Finland
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20
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Ortiz A, Bailey SE, Hublin JJ, Skinner MM. Homology, homoplasy and cusp variability at the enamel-dentine junction of hominoid molars. J Anat 2017; 231:585-599. [PMID: 28718921 PMCID: PMC5603786 DOI: 10.1111/joa.12649] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/02/2017] [Indexed: 12/25/2022] Open
Abstract
Evolutionary studies of mammalian teeth have generally concentrated on the adaptive and functional significance of dental features, whereas the role of development on phenotypic generation and as a source of variation has received comparatively little attention. The present study combines an evolutionary biological framework with state-of-the-art imaging techniques to examine the developmental basis of variation of accessory cusps. Scholars have long used the position and relatedness of cusps to other crown structures as a criterion for differentiating between developmentally homologous and homoplastic features, which can be evaluated with greater accuracy at the enamel-dentine junction (EDJ). Following this approach, we collected digital models of the EDJ and outer enamel surface of more than 1000 hominoid teeth to examine whether cusp 5 of the upper molars (UM C5) and cusps 6 and 7 of the lower molars (LM C6 and LM C7) were associated each with a common developmental origin across species. Results revealed that each of these cusps can develop in a variety of ways, in association with different dental tissues (i.e. oral epithelium, enamel matrix) and dental structures (i.e. from different cusps, crests and cingula). Both within and between species variability in cusp origin was highest in UM C5, followed by LM C7, and finally LM C6. The lack of any species-specific patterns suggests that accessory cusps in hominoids are developmentally homoplastic and that they may not be useful for identifying phylogenetic homology. An important and unanticipated finding of this study was the identification of a new taxonomically informative feature at the EDJ of the upper molars, namely the post-paracone tubercle (PPT). We found that the PPT was nearly ubiquitous in H. neanderthalensis and the small sample of Middle Pleistocene African and European humans (MPAE) examined, differing significantly from the low frequencies observed in all other hominoids, including Pleistocene and recent H. sapiens. We emphasize the utility of the EDJ for human evolutionary studies and demonstrate how features that look similar at the external surface may be the product of different developmental patterns. This study also highlights the importance of incorporating both developmental and morphological data into evolutionary studies in order to gain a better understanding of the evolutionary significance of dental and skeletal features.
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Affiliation(s)
- Alejandra Ortiz
- Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, USA
| | - Shara E Bailey
- Department of Anthropology, Center for the Study of Human Origins, New York University, New York, NY, USA
- 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
| | - Matthew M Skinner
- Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- School of Anthropology and Conservation, University of Kent, Canterbury, UK
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21
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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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22
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Paul KS, Astorino CM, Bailey SE. The Patterning Cascade Model and Carabelli's trait expression in metameres of the mixed human dentition: exploring a morphogenetic model. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2016; 162:3-18. [DOI: 10.1002/ajpa.23080] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 08/08/2016] [Accepted: 08/13/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Kathleen S. Paul
- Center for Bioarchaeological Research, School of Human Evolution and Social ChangeArizona State UniversityTempe Arizona85287
| | - Claudia M. Astorino
- The Graduate School and University Center, The City University of New YorkNew York New York10016
- New York Consortium in Evolutionary PrimatologyNew York New York10028
| | - Shara E. Bailey
- New York Consortium in Evolutionary PrimatologyNew York New York10028
- Center for the Study of Human Origins, Department of AnthropologyNew York UniversityNew York New York10012
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23
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Morita W. Morphological comparison of the enamel–dentine junction and outer enamel surface of molars using a micro-computed tomography technique. J Oral Biosci 2016. [DOI: 10.1016/j.job.2016.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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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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25
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Skinner MM, de Vries D, Gunz P, Kupczik K, Klassen RP, Hublin JJ, Roksandic M. A dental perspective on the taxonomic affinity of the Balanica mandible (BH-1). J Hum Evol 2016; 93:63-81. [DOI: 10.1016/j.jhevol.2016.01.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 11/04/2015] [Accepted: 01/31/2016] [Indexed: 01/19/2023]
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26
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Guy F, Lazzari V, Gilissen E, Thiery G. To What Extent is Primate Second Molar Enamel Occlusal Morphology Shaped by the Enamel-Dentine Junction? PLoS One 2015; 10:e0138802. [PMID: 26406597 PMCID: PMC4634312 DOI: 10.1371/journal.pone.0138802] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 09/03/2015] [Indexed: 11/18/2022] Open
Abstract
The form of two hard tissues of the mammalian tooth, dentine and enamel, is the result of a combination of the phylogenetic inheritance of dental traits and the adaptive selection of these traits during evolution. Recent decades have been significant in unveiling developmental processes controlling tooth morphogenesis, dental variation and the origination of dental novelties. The enamel-dentine junction constitutes a precursor for the morphology of the outer enamel surface through growth of the enamel cap which may go along with the addition of original features. The relative contribution of these two tooth components to morphological variation and their respective response to natural selection is a major issue in paleoanthropology. This study will determine how much enamel morphology relies on the form of the enamel-dentine junction. The outer occlusal enamel surface and the enamel-dentine junction surface of 76 primate second upper molars are represented by polygonal meshes and investigated using tridimensional topometrical analysis. Quantitative criteria (elevation, inclination, orientation, curvature and occlusal patch count) are introduced to show that the enamel-dentine junction significantly constrains the topographical properties of the outer enamel surface. Our results show a significant correlation for elevation, orientation, inclination, curvature and occlusal complexity between the outer enamel surface and the enamel dentine junction for all studied primate taxa with the exception of four modern humans for curvature (p<0.05). Moreover, we show that, for all selected topometrical parameters apart from occlusal patch count, the recorded correlations significantly decrease along with enamel thickening in our sample. While preserving tooth integrity by providing resistance to wear and fractures, the variation of enamel thickness may modify the curvature present at the occlusal enamel surface in relation to enamel-dentine junction, potentially modifying dental functionalities such as blunt versus sharp dental tools. In terms of natural selection, there is a balance between increasing tooth resistance and maintaining efficient dental tools. In this sense the enamel cap acts as a functional buffer for the molar occlusal pattern. In primates, results suggest a primary emergence of dental novelties on the enamel-dentine junction and a secondary transposition of these novelties with no or minor modifications of dental functionalities by the enamel cap. Whereas enamel crenations have been reported by previous studies, our analysis do not support the presence of enamel tubercles without dentine relief nuclei. As is, the enamel cap is, at most, a secondary source of morphological novelty.
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Affiliation(s)
- Franck Guy
- CNRS INEE UMR 7262 – IPHEP, Institut de Paléoprimatologie et Paléontologie Humaine, Evolution et Paléoenvironnements. Université de Poitiers – Faculté des Sciences, Bât. B35 –TSA 51106, 6 rue Michel Brunet, 86073, Poitiers, Cedex 9, France
| | - Vincent Lazzari
- CNRS INEE UMR 7262 – IPHEP, Institut de Paléoprimatologie et Paléontologie Humaine, Evolution et Paléoenvironnements. Université de Poitiers – Faculté des Sciences, Bât. B35 –TSA 51106, 6 rue Michel Brunet, 86073, Poitiers, Cedex 9, France
| | - Emmanuel Gilissen
- Department of African Zoology, Royal Museum of Central Africa, B-3080, Tervuren, Belgium
- Laboratory of Histology and Neuropathology, Université Libre de Bruxelles, B-1070, Brussels, Belgium
| | - Ghislain Thiery
- CNRS INEE UMR 7262 – IPHEP, Institut de Paléoprimatologie et Paléontologie Humaine, Evolution et Paléoenvironnements. Université de Poitiers – Faculté des Sciences, Bât. B35 –TSA 51106, 6 rue Michel Brunet, 86073, Poitiers, Cedex 9, France
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27
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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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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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Zanolli C. Molar crown inner structural organization in JavaneseHomo erectus. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2014; 156:148-57. [DOI: 10.1002/ajpa.22611] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 08/27/2014] [Indexed: 12/28/2022]
Affiliation(s)
- Clément Zanolli
- Multidisciplinary Laboratory; International Centre for Theoretical Physics; Trieste Italy
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Morita W, Yano W, Nagaoka T, Abe M, Ohshima H, Nakatsukasa M. Patterns of morphological variation in enamel-dentin junction and outer enamel surface of human molars. J Anat 2014; 224:669-80. [PMID: 24689536 PMCID: PMC4025894 DOI: 10.1111/joa.12180] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/03/2014] [Indexed: 11/29/2022] Open
Abstract
Tooth crown patterning is governed by the growth and folding of the inner enamel epithelium (IEE) and the following enamel deposition forms outer enamel surface (OES). We hypothesized that overall dental crown shape and covariation structure are determined by processes that configurate shape at the enamel-dentine junction (EDJ), the developmental vestige of IEE. This this hypothesis was tested by comparing patterns of morphological variation between EDJ and OES in human permanent maxillary first molar (UM1) and deciduous second molar (um2). Using geometric morphometric methods, we described morphological variation and covariation between EDJ and OES, and evaluated the strength of two components of phenotypic variability, canalization and morphological integration, in addition to the relevant evolutionary flexibility, i.e. the ability to respond to selective pressure. The strength of covariation between EDJ and OES was greater in um2 than in UM1, and the way that multiple traits covary between EDJ and OES was different between these teeth. The variability analyses showed that EDJ had less shape variation and a higher level of morphological integration than OES, which indicated that canalization and morphological integration acted as developmental constraints. These tendencies were greater in UM1 than in um2. On the other hand, EDJ and OES had a comparable level of evolvability in these teeth. Amelogenesis could play a significant role in tooth shape and covariation structure, and its influence was not constant among teeth, which may be responsible for the differences in the rate and/or period of enamel formation.
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Affiliation(s)
- Wataru Morita
- Laboratory of Physical Anthropology, Department of Zoology, Graduate School of Science, Kyoto UniversityKyoto, Japan
| | - Wataru Yano
- Department of Oral Anatomy, Division of Oral Structure, Function and Development, Asahi University School of DentistryMizuho, Gifu, Japan
| | - Tomohito Nagaoka
- Department of Anatomy, St. Marianna University School of MedicineKawasaki, Kanagawa, Japan
| | - Mikiko Abe
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Osaka City UniversityOsaka, Japan
| | - Hayato Ohshima
- Division of Anatomy and Cell Biology of the Hard Tissue, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental SciencesNiigata, Japan
| | - Masato Nakatsukasa
- Laboratory of Physical Anthropology, Department of Zoology, Graduate School of Science, Kyoto UniversityKyoto, Japan
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Heaton JL, Pickering TR. First Records of Talon Cusps on Baboon Maxillary Incisors Argue for Standardizing Terminology and Prompt a Hypothesis of Their Formation. Anat Rec (Hoboken) 2013; 296:1874-80. [DOI: 10.1002/ar.22826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Accepted: 09/30/2013] [Indexed: 12/19/2022]
Affiliation(s)
- Jason L. Heaton
- Department of Biology; Birmingham-Southern College; Birmingham Alabama 35254
- Plio-Pleistocene Palaeontology Section, Department of Vertebrates Ditsong National Museum of Natural History (Transvaal Museum); Pretoria 0002 South Africa
- Institute for Human Evolution,University of the Witwatersrand; Private Bag 3 WITS 2050 Johannesburg South Africa
| | - Travis Rayne Pickering
- Plio-Pleistocene Palaeontology Section, Department of Vertebrates Ditsong National Museum of Natural History (Transvaal Museum); Pretoria 0002 South Africa
- Institute for Human Evolution,University of the Witwatersrand; Private Bag 3 WITS 2050 Johannesburg South Africa
- Department of Anthropology; University of Wisconsin-Madison; 1180 Observatory Drive, 5240 Social Science Building Madison Wisconsin 53706
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