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Chaimanee Y, Chavasseau O, Lazzari V, Soe AN, Sein C, Jaeger JJ. Early anthropoid primates: New data and new questions. Evol Anthropol 2024; 33:e22022. [PMID: 38270328 DOI: 10.1002/evan.22022] [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: 08/08/2023] [Revised: 11/29/2023] [Accepted: 01/11/2024] [Indexed: 01/26/2024]
Abstract
Although the evolutionary history of anthropoid primates (monkeys, apes, and humans) appears relatively well-documented, there is limited data available regarding their origins and early evolution. We review and discuss here the earliest records of anthropoid primates from Asia, Africa, and South America. New fossils provide strong support for the Asian origin of anthropoid primates. However, the earliest recorded anthropoids from Africa and South America are still subject to debate, and the early evolution and dispersal of platyrhines to South America remain unclear. Because of the rarity and incomplete nature of many stem anthropoid taxa, establishing the phylogenetic relationships among the earliest anthropoids remains challenging. Nonetheless, by examining evidence from anthropoids and other mammalian groups, we demonstrate that several dispersal events occurred between South Asia and Afro-Arabia during the middle Eocene to the early Oligocene. It is possible that a microplate situated in the middle of the Neotethys Ocean significantly reduced the distance of overseas dispersal.
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Affiliation(s)
- Yaowalak Chaimanee
- Laboratory PALEVOPRIM, UMR 7262 CNRS, University of Poitiers, Poitiers, France
| | - Olivier Chavasseau
- Laboratory PALEVOPRIM, UMR 7262 CNRS, University of Poitiers, Poitiers, France
| | - Vincent Lazzari
- Laboratory PALEVOPRIM, UMR 7262 CNRS, University of Poitiers, Poitiers, France
| | - Aung N Soe
- University of Distance Education, Mandalay, Myanmar
| | - Chit Sein
- University of Distance Education, Yangon, Myanmar
| | - Jean-Jacques Jaeger
- Laboratory PALEVOPRIM, UMR 7262 CNRS, University of Poitiers, Poitiers, France
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2
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Towle I, Borths MR, Loch C. Tooth chipping patterns and dental caries suggest a soft fruit diet in early anthropoids. AMERICAN JOURNAL OF BIOLOGICAL ANTHROPOLOGY 2024; 183:e24884. [PMID: 38093580 DOI: 10.1002/ajpa.24884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 11/07/2023] [Accepted: 11/21/2023] [Indexed: 01/25/2024]
Abstract
OBJECTIVES Fossils from the Fayum Depression, Egypt, are crucial for understanding anthropoid evolution due to the abundance of taxa and the time interval they represent (late Eocene to early Oligocene). Dietary and foraging behavioral interpretations suggest fruits were their dominant food source, although hard foods (e.g., seeds and nuts) and leaves could have been important dietary components for particular groups. In this study, we compare dental chipping patterns in five Fayum primate genera with chipping data for extant primates, to assess potential hard object feeding in early anthropoids. MATERIALS AND METHODS Original specimens were studied (Aegyptopithecus: n = 100 teeth; Parapithecus: n = 72, Propliopithecus: n = 99, Apidium: n = 82; Catopithecus: n = 68); with the number, severity, and position of chips recorded. Dental caries was also recorded, due to its association with soft fruit consumption in extant primates. RESULTS Tooth chipping was low across all five genera studied, with a pooled chipping prevalence of 5% (21/421). When split into the three anthropoid families represented, chipping prevalence ranged from 2.6% (4/154) in Parapithecidae, 6% (12/199) in Propliopithecidae, and 7.4% (5/68) in Oligopithecidae. Three carious lesions were identified in Propliopithecidae. DISCUSSION The chipping prevalence is low when compared to extant anthropoids (range from 4% to 40%) and is consistent with a predominantly soft fruit diet, but not with habitual hard food mastication. The presence of caries supports consumption of soft, sugary fruits, at least in Propliopithecidae. Our results add support for low dietary diversity in early anthropoids, with soft fruits as likely dominant food sources.
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Affiliation(s)
- Ian Towle
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Matthew R Borths
- Duke Lemur Center Museum of Natural History, Duke University, Durham, North Carolina, USA
| | - Carolina Loch
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
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3
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Pampush JD, Fuselier EJ, Yapuncich GS. Using BayesModelS to provide Bayesian- and phylogenetically-informed primate body mass predictions. J Hum Evol 2021; 161:103077. [PMID: 34688978 DOI: 10.1016/j.jhevol.2021.103077] [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: 12/09/2019] [Revised: 09/01/2021] [Accepted: 09/01/2021] [Indexed: 10/20/2022]
Abstract
An accurate prediction of the body mass of an extinct species can greatly inform the reconstruction of that species' ecology. Therefore, paleontologists frequently predict the body mass of extinct taxa from fossilized materials, particularly dental dimensions. Body mass prediction has traditionally been performed in a frequentist statistical framework, and accounting for phylogenetic relationships while calibrating prediction models has only recently become more commonplace. In this article, we apply BayesModelS-a phylogenetically informed Bayesian prediction method-to predict body mass in a sample of 49 euarchontan species (24 strepsirrhines, 20 platyrrhines, 3 tarsiids, 1 dermopteran, and 1 scandentian) and compare this approach's body mass prediction accuracy with other commonly used techniques, namely ordinary least squares, phylogenetic generalized least squares, and phylogenetic independent contrasts (PICs). When predicting the body masses of extant euarchontans from dental and postcranial variables, BayesModelS and PICs have substantially higher predictive accuracy than ordinary least squares and phylogenetic generalized least squares. The improved performances of BayesModelS and PIC are most evident for dentally derived body mass proxies or when body mass proxies have high degrees of phylogenetic covariance. Predicted values generated by BayesModelS and PIC methods also show less variance across body mass proxies when applied to the Eocene adapiform Notharctus tenebrosus. These more explicitly phylogenetically based methods should prove useful for predicting body mass in a paleontological context, and we provide executive scripts for both BayesModelS and PIC to increase ease of application.
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Affiliation(s)
- James D Pampush
- Department of Exercise Science, High Point University, High Point, NC 27260, USA; Department of Physician Assistant Studies, High Point University, High Point, NC 27260, USA.
| | - Edward J Fuselier
- Department of Mathematical Sciences, High Point University, High Point, NC 27260, USA
| | - Gabriel S Yapuncich
- Department of Evolutionary Anthropology, Duke University, Durham, NC 27708, USA; Medical Education Administration, Duke University School of Medicine, Durham, NC 27710, USA
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4
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Jaeger JJ, Sein C, Gebo DL, Chaimanee Y, Nyein MT, Oo TZ, Aung MM, Suraprasit K, Rugbumrung M, Lazzari V, Soe AN, Chavasseau O. Amphipithecine primates are stem anthropoids: cranial and postcranial evidence. Proc Biol Sci 2020; 287:20202129. [PMID: 33171091 DOI: 10.1098/rspb.2020.2129] [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] [Indexed: 11/12/2022] Open
Abstract
Since their discovery in 1927, the phylogenetic status of the Myanmar amphipithecines has been highly debated. These fossil primates are recognized either as anthropoids or as adapiform strepsirrhines. This uncertainty was largely the consequence of a limited fossil record consisting mostly of jaw fragments but lacking the critical cranial elements that might resolve this debate. We report here cranial remains associated with an ulna from a single individual pertaining to the amphipithecine Ganlea megacanina. In addition to anthropoid-like dentognathic characters, Ganlea displays several ulna and skull features that testify to its anthropoid affinities (e.g. short subvertically oriented lacrimal duct, lacrimal foramen and bone inside the orbit, maxillary contribution to the lower orbital rim, fused metopic suture). By contrast to crown anthropoids, however, Ganlea lacks postorbital closure, confirming that postorbital closure appeared later than many anthropoid dentognathic characters and evolved convergently in extant tarsiers and anthropoids. Thus, amphipithecines must now be recognized as stem anthropoids offering a unique window on the early evolution of cranial and skeletal features in anthropoids, and reinforcing the hypothesis of an origin and early diversification of anthropoids in Asia.
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Affiliation(s)
- J-J Jaeger
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 Rue Michel Brunet, 86073 Poitiers Cedex 9, France
| | - C Sein
- Department of Higher Education, Ministry of Education, Naypyitaw 15011, Myanmar
| | - D L Gebo
- Department of Anthropology, Northern Illinois University, DeKalb, IL 60115, USA
| | - Y Chaimanee
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 Rue Michel Brunet, 86073 Poitiers Cedex 9, France
| | - M T Nyein
- Department of Underwater Archaeology, Field School of Archaeology, Pyay Township, Bago Region, Myanmar
| | - T Z Oo
- Department of Geology, East Yangon University, Thanlyin Township, Yangon, Myanmar
| | - M M Aung
- Department of Geology, East Yangon University, Thanlyin Township, Yangon, Myanmar
| | - K Suraprasit
- Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - M Rugbumrung
- Department of Mineral Resources, Rama VI Road, Bangkok 10400, Thailand
| | - V Lazzari
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 Rue Michel Brunet, 86073 Poitiers Cedex 9, France
| | - A N Soe
- University of Distance Education, Mandalay 05023, Myanmar
| | - O Chavasseau
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 Rue Michel Brunet, 86073 Poitiers Cedex 9, France
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5
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Granatosky MC, Ross CF. Differences in muscle mechanics underlie divergent optimality criteria between feeding and locomotor systems. J Anat 2020; 237:1072-1086. [PMID: 32671858 DOI: 10.1111/joa.13279] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/19/2020] [Accepted: 06/22/2020] [Indexed: 01/03/2023] Open
Abstract
Tetrapod musculoskeletal diversity is usually studied separately in feeding and locomotor systems. However, direct comparisons between these systems promise important insight into how natural selection deploys the same basic musculoskeletal toolkit-connective tissues, bones, nerves, and skeletal muscle-to meet the differing performance criteria of feeding and locomotion. Recent studies using this approach have proposed that the feeding system is optimized for precise application of high forces and the locomotor system is optimized for wide and rapid joint excursions for minimal energetic expenditure. If this hypothesis is correct, then it stands to reason that other anatomical and biomechanical variables within the feeding and locomotor systems should reflect these diverging functions. To test this hypothesis, we compared muscle moment arm lengths, mechanical advantages, and force vector orientations of two jaw elevator muscles (m. temporalis and m. superficial masseter), an elbow flexor (m. brachialis) and extensor (m. triceps- lateral head), and a knee flexor (m. biceps femoris-short head) and extensor (m. vastus lateralis) across 18 species of primates. Our results show that muscles of the feeding system are more orthogonally oriented relative to the resistance arm (mandible) and operate at relatively large moment arms and mechanical advantages. Moreover, these variables show relatively little change across the range of jaw excursion. In contrast, the representative muscles of the locomotor system have much smaller mechanical advantages and, depending on joint position, smaller muscle moment arm lengths and almost parallel orientations relative to the resistance arm. These patterns are consistent regardless of phylogeny, body mass, locomotor mode, and feeding specialization. We argue that these findings reflect fundamental functional dichotomies between tetrapod locomotor and feeding systems. By organizing muscles in a manner such that moment arms and mechanical advantage are relatively small, the locomotor system can produce broad joint excursions and high angular velocities with only small muscular contraction. As such, the anatomical organization of muscles within the limbs allows striding animals to move relatively rapidly and with minimal energetic expenditure. In contrast, the anatomical configuration of muscles in the feeding system, at least m. superficial masseter and m. temporalis, favors their force-producing capacity at the expense of excursion and velocity.
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Affiliation(s)
- Michael C Granatosky
- Department of Anatomy, New York Institute of Technology, Old Westbury, New York, USA
| | - Callum F Ross
- Department of Organismal Biology and Anatomy, University of Chicago, Chicago, Illinois, USA
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6
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Hood SC, Torres CR, Norell MA, Clarke JA. New Fossil Birds from the Earliest Eocene of Mongolia. AMERICAN MUSEUM NOVITATES 2019. [DOI: 10.1206/3934.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Sarah C. Hood
- Jackson School of Geosciences, University of Texas at Austin, Austin
| | - Chris R. Torres
- Jackson School of Geosciences, University of Texas at Austin, Austin
| | - Mark A. Norell
- Richard Gilder Graduate School, American Museum of Natural History, New York, NY
| | - Julia A. Clarke
- Jackson School of Geosciences, University of Texas at Austin, Austin
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7
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Jaeger JJ, Chavasseau O, Lazzari V, Naing Soe A, Sein C, Le Maître A, Shwe H, Chaimanee Y. New Eocene primate from Myanmar shares dental characters with African Eocene crown anthropoids. Nat Commun 2019; 10:3531. [PMID: 31388005 PMCID: PMC6684601 DOI: 10.1038/s41467-019-11295-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 07/02/2019] [Indexed: 11/09/2022] Open
Abstract
Recent discoveries of older and phylogenetically more primitive basal anthropoids in China and Myanmar, the eosimiiforms, support the hypothesis that Asia was the place of origins of anthropoids, rather than Africa. Similar taxa of eosimiiforms have been discovered in the late middle Eocene of Myanmar and North Africa, reflecting a colonization event that occurred during the middle Eocene. However, these eosimiiforms were probably not the closest ancestors of the African crown anthropoids. Here we describe a new primate from the middle Eocene of Myanmar that documents a new clade of Asian anthropoids. It possesses several dental characters found only among the African crown anthropoids and their nearest relatives, indicating that several of these characters have appeared within Asian clades before being recorded in Africa. This reinforces the hypothesis that the African colonization of anthropoids was the result of several dispersal events, and that it involved more derived taxa than eosimiiforms.
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Affiliation(s)
- Jean-Jacques Jaeger
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 rue Michel Brunet Cedex 9, 86073, Poitiers, France.
| | - Olivier Chavasseau
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 rue Michel Brunet Cedex 9, 86073, Poitiers, France
| | - Vincent Lazzari
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 rue Michel Brunet Cedex 9, 86073, Poitiers, France
| | - Aung Naing Soe
- University of Distance Education, Mandalay, 05023, Myanmar
| | - Chit Sein
- Ministry of Education, Department of Higher Education, Naypyitaw, 15011, Myanmar
| | - Anne Le Maître
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 rue Michel Brunet Cedex 9, 86073, Poitiers, France.,Department of Theoretical Biology, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Hla Shwe
- Department of Archaeology and National Museum, Mandalay Branch, Ministry of Religious Affairs and Culture, Mandalay, 05011, Myanmar
| | - Yaowalak Chaimanee
- Laboratory PALEVOPRIM, UMR CNRS 7262, University of Poitiers, 6 rue Michel Brunet Cedex 9, 86073, Poitiers, France
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8
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Locomotion, postures, substrate use, and foot grasping in the marsupial feathertail glider Acrobates pygmaeus (Diprotodontia: Acrobatidae): Insights into early euprimate evolution. J Hum Evol 2018; 123:148-159. [DOI: 10.1016/j.jhevol.2018.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 07/22/2018] [Accepted: 07/23/2018] [Indexed: 11/17/2022]
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9
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Rose KD, Dunn RH, Kumar K, Perry JMG, Prufrock KA, Rana RS, Smith T. New fossils from Tadkeshwar Mine (Gujarat, India) increase primate diversity from the early Eocene Cambay Shale. J Hum Evol 2018; 122:93-107. [PMID: 29886006 DOI: 10.1016/j.jhevol.2018.05.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 05/11/2018] [Accepted: 05/14/2018] [Indexed: 12/21/2022]
Abstract
Several new fossil specimens from the Cambay Shale Formation at Tadkeshwar Lignite Mine in Gujarat document the presence of two previously unknown early Eocene primate species from India. A new species of Asiadapis is named based on a jaw fragment preserving premolars similar in morphology to those of A. cambayensis but substantially larger. Also described is an exceptionally preserved edentulous dentary (designated cf. Asiadapis, unnamed sp. nov.) that is slightly larger and much more robust than previously known Cambay Shale primates. Its anatomy most closely resembles that of Eocene adapoids, and the dental formula is the same as in A. cambayensis. A femur and calcaneus are tentatively allocated to the same taxon. Although the dentition is unknown, exquisite preservation of the dentary of cf. Asiadapis sp. nov. enables an assessment of masticatory musculature, function, and gape adaptations, as well as comparison with an equally well-preserved dentary of the asiadapid Marcgodinotius indicus, also from Tadkeshwar. The new M. indicus specimen shows significant gape adaptations but was probably capable of only weak bite force, whereas cf. Asiadapis sp. nov. probably used relatively smaller gapes but could generate relatively greater bite forces.
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Affiliation(s)
- Kenneth D Rose
- Center for Functional Anatomy and Evolution, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
| | - Rachel H Dunn
- Department of Anatomy, Des Moines University, Des Moines, IA 50312, USA
| | - Kishor Kumar
- Wadia Institute of Himalayan Geology, Dehradun 248001, Uttarakhand, India
| | - Jonathan M G Perry
- Center for Functional Anatomy and Evolution, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Kristen A Prufrock
- Center for Functional Anatomy and Evolution, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Rajendra S Rana
- Department of Geology, H.N.B. Garhwal University, Srinagar 246175, Uttarakhand, India
| | - Thierry Smith
- Directorate Earth and History of Life, Royal Belgian Institute of Natural Sciences, B-1000, Brussels, Belgium
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10
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Yapuncich GS. Alternative methods for calculating percentage prediction error and their implications for predicting body mass in fossil taxa. J Hum Evol 2018; 115:140-145. [DOI: 10.1016/j.jhevol.2017.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 03/14/2017] [Accepted: 03/15/2017] [Indexed: 10/19/2022]
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11
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Gao T, Yapuncich GS, Daubechies I, Mukherjee S, Boyer DM. Development and Assessment of Fully Automated and Globally Transitive Geometric Morphometric Methods, With Application to a Biological Comparative Dataset With High Interspecific Variation. Anat Rec (Hoboken) 2017; 301:636-658. [PMID: 29024541 DOI: 10.1002/ar.23700] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/15/2017] [Accepted: 08/07/2017] [Indexed: 11/05/2022]
Abstract
Automated geometric morphometric methods are promising tools for shape analysis in comparative biology, improving researchers' abilities to quantify variation extensively (by permitting more specimens to be analyzed) and intensively (by characterizing shapes with greater fidelity). Although use of these methods has increased, published automated methods have some notable limitations: pairwise correspondences are frequently inaccurate and pairwise mappings are not globally consistent (i.e., they lack transitivity across the full sample). Here, we reassess the accuracy of published automated methods-cPDist (Boyer et al. Proc Nat Acad Sci 108 () 18221-18226) and auto3Dgm (Boyer et al.: Anat Rec 298 () 249-276)-and evaluate several modifications to these methods. We show that a substantial percentage of alignments and pairwise maps between specimens of dissimilar geometries were inaccurate in the study of Boyer et al. (Proc Nat Acad Sci 108 () 18221-18226), despite a taxonomically partitioned variance structure of continuous Procrustes distances. We show these inaccuracies are remedied using a globally informed methodology within a collection of shapes, rather than relying on pairwise comparisons (c.f. Boyer et al.: Anat Rec 298 () 249-276). Unfortunately, while global information generally enhances maps between dissimilar objects, it can degrade the quality of correspondences between similar objects due to the accumulation of numerical error. We explore a number of approaches to mitigate this degradation, quantify their performance, and compare the generated pairwise maps (and the shape space characterized by these maps) to a "ground truth" obtained from landmarks manually collected by geometric morphometricians. Novel methods both improve the quality of the pairwise correspondences relative to cPDist and achieve a taxonomic distinctiveness comparable to auto3Dgm. Anat Rec, 301:636-658, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Tingran Gao
- Department of Mathematics, Duke University, Durham, North Carolina
| | - Gabriel S Yapuncich
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina.,Department of Evolutionary Anthropology, Duke University, Durham, North Carolina
| | | | - Sayan Mukherjee
- Departments of Statistical Science, Mathematics, and Computer Science, Duke University, Durham, North Carolina
| | - Doug M Boyer
- Department of Evolutionary Anthropology, Duke University, Durham, North Carolina
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12
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Gaudry MJ, Jastroch M, Treberg JR, Hofreiter M, Paijmans JLA, Starrett J, Wales N, Signore AV, Springer MS, Campbell KL. Inactivation of thermogenic UCP1 as a historical contingency in multiple placental mammal clades. SCIENCE ADVANCES 2017; 3:e1602878. [PMID: 28706989 PMCID: PMC5507634 DOI: 10.1126/sciadv.1602878] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 06/21/2017] [Indexed: 05/08/2023]
Abstract
Mitochondrial uncoupling protein 1 (UCP1) is essential for nonshivering thermogenesis in brown adipose tissue and is widely accepted to have played a key thermoregulatory role in small-bodied and neonatal placental mammals that enabled the exploitation of cold environments. We map ucp1 sequences from 133 mammals onto a species tree constructed from a ~51-kb sequence alignment and show that inactivating mutations have occurred in at least 8 of the 18 traditional placental orders, thereby challenging the physiological importance of UCP1 across Placentalia. Selection and timetree analyses further reveal that ucp1 inactivations temporally correspond with strong secondary reductions in metabolic intensity in xenarthrans and pangolins, or in six other lineages coincided with a ~30 million-year episode of global cooling in the Paleogene that promoted sharp increases in body mass and cladogenesis evident in the fossil record. Our findings also demonstrate that members of various lineages (for example, cetaceans, horses, woolly mammoths, Steller's sea cows) evolved extreme cold hardiness in the absence of UCP1-mediated thermogenesis. Finally, we identify ucp1 inactivation as a historical contingency that is linked to the current low species diversity of clades lacking functional UCP1, thus providing the first evidence for species selection related to the presence or absence of a single gene product.
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Affiliation(s)
- Michael J. Gaudry
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Martin Jastroch
- Institute for Diabetes and Obesity, Helmholtz Zentrum München, German Research Center for Environmental Health, Parkring 13, 85748 Garching, Germany
- Department of Animal Physiology, Faculty of Biology, Philipps University of Marburg, D-35032 Marburg, Germany
| | - Jason R. Treberg
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
- Department of Human Nutritional Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Michael Hofreiter
- Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | | | - James Starrett
- Department of Biology, University of California, Riverside, CA 92521, USA
| | - Nathan Wales
- Centre for GeoGenetics, Natural History Museum of Denmark, Øster Voldgade 5-7, 1350 Copenhagen, Denmark
| | - Anthony V. Signore
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Mark S. Springer
- Department of Biology, University of California, Riverside, CA 92521, USA
| | - Kevin L. Campbell
- Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
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13
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New euprimate postcrania from the early Eocene of Gujarat, India, and the strepsirrhine–haplorhine divergence. J Hum Evol 2016; 99:25-51. [DOI: 10.1016/j.jhevol.2016.06.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 06/24/2016] [Accepted: 06/30/2016] [Indexed: 11/20/2022]
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14
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Bloch JI, Chester SG, Silcox MT. Cranial anatomy of Paleogene Micromomyidae and implications for early primate evolution. J Hum Evol 2016; 96:58-81. [DOI: 10.1016/j.jhevol.2016.04.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 04/04/2016] [Accepted: 04/06/2016] [Indexed: 11/29/2022]
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15
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St. Clair EM, Boyer DM. Lower molar shape and size in prosimian and platyrrhine primates. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2016; 161:237-58. [DOI: 10.1002/ajpa.23021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 04/12/2016] [Accepted: 05/18/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Elizabeth M. St. Clair
- Center for Functional Anatomy and EvolutionJohns Hopkins UniversityBaltimore Maryland21205
| | - Doug M. Boyer
- Department of Evolutionary AnthropologyDuke UniversityDurham North Carolina27708
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16
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Soligo C, Smaers JB. Contextualising primate origins--an ecomorphological framework. J Anat 2016; 228:608-29. [PMID: 26830706 PMCID: PMC4804135 DOI: 10.1111/joa.12441] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/16/2015] [Indexed: 12/15/2022] Open
Abstract
Ecomorphology - the characterisation of the adaptive relationship between an organism's morphology and its ecological role - has long been central to theories of the origin and early evolution of the primate order. This is exemplified by two of the most influential theories of primate origins: Matt Cartmill's Visual Predation Hypothesis, and Bob Sussman's Angiosperm Co-Evolution Hypothesis. However, the study of primate origins is constrained by the absence of data directly documenting the events under investigation, and has to rely instead on a fragmentary fossil record and the methodological assumptions inherent in phylogenetic comparative analyses of extant species. These constraints introduce particular challenges for inferring the ecomorphology of primate origins, as morphology and environmental context must first be inferred before the relationship between the two can be considered. Fossils can be integrated in comparative analyses and observations of extant model species and laboratory experiments of form-function relationships are critical for the functional interpretation of the morphology of extinct species. Recent developments have led to important advancements, including phylogenetic comparative methods based on more realistic models of evolution, and improved methods for the inference of clade divergence times, as well as an improved fossil record. This contribution will review current perspectives on the origin and early evolution of primates, paying particular attention to their phylogenetic (including cladistic relationships and character evolution) and environmental (including chronology, geography, and physical environments) contextualisation, before attempting an up-to-date ecomorphological synthesis of primate origins.
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Affiliation(s)
| | - Jeroen B Smaers
- Department of Anthropology, Stony Brook University, Stony Brook, NY, USA
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17
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Oyston JW, Hughes M, Wagner PJ, Gerber S, Wills MA. What limits the morphological disparity of clades? Interface Focus 2015; 5:20150042. [PMID: 26640649 DOI: 10.1098/rsfs.2015.0042] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The morphological disparity of species within major clades shows a variety of trajectory patterns through evolutionary time. However, there is a significant tendency for groups to reach their maximum disparity relatively early in their histories, even while their species richness or diversity is comparatively low. This pattern of early high-disparity suggests that there are internal constraints (e.g. developmental pleiotropy) or external restrictions (e.g. ecological competition) upon the variety of morphologies that can subsequently evolve. It has also been demonstrated that the rate of evolution of new character states decreases in most clades through time (character saturation), as does the rate of origination of novel bodyplans and higher taxa. Here, we tested whether there was a simple relationship between the level or rate of character state exhaustion and the shape of a clade's disparity profile: specifically, its centre of gravity (CG). In a sample of 93 extinct major clades, most showed some degree of exhaustion, but all continued to evolve new states up until their extinction. Projection of states/steps curves suggested that clades realized an average of 60% of their inferred maximum numbers of states. Despite a weak but significant correlation between overall levels of homoplasy and the CG of clade disparity profiles, there were no significant relationships between any of our indices of exhaustion curve shape and the clade disparity CG. Clades showing early high-disparity were no more likely to have early character saturation than those with maximum disparity late in their evolution.
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Affiliation(s)
- Jack W Oyston
- The Milner Centre for Evolution , Department of Biology & Biochemistry, University of Bath , Bath BA2 7AY , UK
| | - Martin Hughes
- Department of Life Sciences , The Natural History Museum , London SW7 5BD , UK
| | - Peter J Wagner
- Department of Paleobiology, National Museum of Natural History , Smithsonian Institution , Washington, DC 20013-7012 , USA
| | - Sylvain Gerber
- Department of Earth Sciences , University of Cambridge , Cambridge CB2 3EQ , UK
| | - Matthew A Wills
- The Milner Centre for Evolution , Department of Biology & Biochemistry, University of Bath , Bath BA2 7AY , UK
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18
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Karantanis NE, Youlatos D, Rychlik L. Diagonal gaits in the feathertail glider Acrobates pygmaeus (Acrobatidae, Diprotodontia): Insights for the evolution of primate quadrupedalism. J Hum Evol 2015. [DOI: 10.1016/j.jhevol.2015.06.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yapuncich GS, Gladman JT, Boyer DM. Predicting euarchontan body mass: A comparison of tarsal and dental variables. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2015; 157:472-506. [DOI: 10.1002/ajpa.22735] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 01/14/2015] [Accepted: 02/21/2015] [Indexed: 11/07/2022]
Affiliation(s)
| | - Justin T. Gladman
- The Graduate Center; City University of New York; New York NY 10016
- New York Consortium in Evolutionary Primatology (NYCEP); New York NY 10028
| | - Doug M. Boyer
- Department of Evolutionary Anthropology; Duke University; Durham NC 27708
- New York Consortium in Evolutionary Primatology (NYCEP); New York NY 10028
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20
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Allen KL, Cooke SB, Gonzales LA, Kay RF. Dietary inference from upper and lower molar morphology in platyrrhine primates. PLoS One 2015; 10:e0118732. [PMID: 25738266 PMCID: PMC4349698 DOI: 10.1371/journal.pone.0118732] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 01/22/2015] [Indexed: 11/24/2022] Open
Abstract
The correlation between diet and dental topography is of importance to paleontologists seeking to diagnose ecological adaptations in extinct taxa. Although the subject is well represented in the literature, few studies directly compare methods or evaluate dietary signals conveyed by both upper and lower molars. Here, we address this gap in our knowledge by comparing the efficacy of three measures of functional morphology for classifying an ecologically diverse sample of thirteen medium- to large-bodied platyrrhines by diet category (e.g., folivore, frugivore, hard object feeder). We used Shearing Quotient (SQ), an index derived from linear measurements of molar cutting edges and two indices of crown surface topography, Occlusal Relief (OR) and Relief Index (RFI). Using SQ, OR, and RFI, individuals were then classified by dietary category using Discriminate Function Analysis. Both upper and lower molar variables produce high classification rates in assigning individuals to diet categories, but lower molars are consistently more successful. SQs yield the highest classification rates. RFI and OR generally perform above chance. Upper molar RFI has a success rate below the level of chance. Adding molar length enhances the discriminatory power for all variables. We conclude that upper molar SQs are useful for dietary reconstruction, especially when combined with body size information. Additionally, we find that among our sample of platyrrhines, SQ remains the strongest predictor of diet, while RFI is less useful at signaling dietary differences in absence of body size information. The study demonstrates new ways for inferring the diets of extinct platyrrhine primates when both upper and lower molars are available, or, for taxa known only from upper molars. The techniques are useful in reconstructing diet in stem representatives of anthropoid clade, who share key aspects of molar morphology with extant platyrrhines.
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Affiliation(s)
- Kari L. Allen
- Department of Anatomy & Neurobiology, Washington University Medical School, 660 S. Euclid Ave., Box 8108, St. Louis, Missouri 63110, United States of America
| | - Siobhán B. Cooke
- Department of Anthropology, Northeastern Illinois University, 5500 N. St. Louis Avenue Chicago, Illinois 60625, United States of America
| | - Lauren A. Gonzales
- Department of Evolutionary Anthropology, Duke University, Box 90383, Durham, North Carolina 27708, United States of America
| | - Richard F. Kay
- Department of Evolutionary Anthropology, Duke University, Box 90383, Durham, North Carolina 27708, United States of America
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21
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Heritage S. Modeling olfactory bulb evolution through primate phylogeny. PLoS One 2014; 9:e113904. [PMID: 25426851 PMCID: PMC4245229 DOI: 10.1371/journal.pone.0113904] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 11/02/2014] [Indexed: 11/23/2022] Open
Abstract
Adaptive characterizations of primates have usually included a reduction in olfactory sensitivity. However, this inference of derivation and directionality assumes an ancestral state of olfaction, usually by comparison to a group of extant non-primate mammals. Thus, the accuracy of the inference depends on the assumed ancestral state. Here I present a phylogenetic model of continuous trait evolution that reconstructs olfactory bulb volumes for ancestral nodes of primates and mammal outgroups. Parent-daughter comparisons suggest that, relative to the ancestral euarchontan, the crown-primate node is plesiomorphic and that derived reduction in olfactory sensitivity is an attribute of the haplorhine lineage. The model also suggests a derived increase in olfactory sensitivity at the strepsirrhine node. This oppositional diversification of the strepsirrhine and haplorhine lineages from an intermediate and non-derived ancestor is inconsistent with a characterization of graded reduction through primate evolution.
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Affiliation(s)
- Steven Heritage
- Interdepartmental Doctoral Program in Anthropological Sciences, Stony Brook University, Stony Brook, New York, United States of America
- * E-mail:
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Marivaux L, Essid EM, Marzougui W, Khayati Ammar H, Adnet S, Marandat B, Merzeraud G, Ramdarshan A, Tabuce R, Vianey-Liaud M, Yans J. A morphological intermediate between eosimiiform and simiiform primates from the late middle Eocene of Tunisia: Macroevolutionary and paleobiogeographic implications of early anthropoids. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2014; 154:387-401. [DOI: 10.1002/ajpa.22523] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Accepted: 04/18/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Laurent Marivaux
- Laboratoire de Paléontologie; Institut des Sciences de l'Évolution de Montpellier (ISE-M, UMR 5554, CNRS, UM2, IRD), c.c. 064, Université Montpellier 2; F-34095 Montpellier Cedex 05 France
| | - El Mabrouk Essid
- Office National des Mines (ONM); Tunis BP: 215 - 1080 Tunis Tunisia
| | - Wissem Marzougui
- Office National des Mines (ONM); Tunis BP: 215 - 1080 Tunis Tunisia
| | | | - Sylvain Adnet
- Laboratoire de Paléontologie; Institut des Sciences de l'Évolution de Montpellier (ISE-M, UMR 5554, CNRS, UM2, IRD), c.c. 064, Université Montpellier 2; F-34095 Montpellier Cedex 05 France
| | - Bernard Marandat
- Laboratoire de Paléontologie; Institut des Sciences de l'Évolution de Montpellier (ISE-M, UMR 5554, CNRS, UM2, IRD), c.c. 064, Université Montpellier 2; F-34095 Montpellier Cedex 05 France
| | - Gilles Merzeraud
- Géosciences Montpellier (UMR-CNRS 5243); c.c. 060, Université Montpellier 2; F-34095 Montpellier Cedex 05 France
| | - Anusha Ramdarshan
- Laboratoire de Paléontologie; Institut des Sciences de l'Évolution de Montpellier (ISE-M, UMR 5554, CNRS, UM2, IRD), c.c. 064, Université Montpellier 2; F-34095 Montpellier Cedex 05 France
| | - Rodolphe Tabuce
- Laboratoire de Paléontologie; Institut des Sciences de l'Évolution de Montpellier (ISE-M, UMR 5554, CNRS, UM2, IRD), c.c. 064, Université Montpellier 2; F-34095 Montpellier Cedex 05 France
| | - Monique Vianey-Liaud
- Laboratoire de Paléontologie; Institut des Sciences de l'Évolution de Montpellier (ISE-M, UMR 5554, CNRS, UM2, IRD), c.c. 064, Université Montpellier 2; F-34095 Montpellier Cedex 05 France
| | - Johan Yans
- Department of Geology; University of Namur; NaGRIDD B-5000 Namur Belgium
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Chaimanee Y, Chavasseau O, Lazzari V, Euriat A, Jaeger JJ. A new Late Eocene primate from the Krabi Basin (Thailand) and the diversity of Palaeogene anthropoids in southeast Asia. Proc Biol Sci 2013; 280:20132268. [PMID: 24089342 DOI: 10.1098/rspb.2013.2268] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
According to the most recent discoveries from the Middle Eocene of Myanmar and China, anthropoid primates originated in Asia rather than in Africa, as was previously considered. But the Asian Palaeogene anthropoid community remains poorly known and inadequately sampled, being represented only from China, Myanmar, Pakistan and Thailand. Asian Eocene anthropoids can be divided into two distinct groups, the stem group eosimiiforms and the possible crown group amphipithecids, but the phylogenetic relationships between these two groups are not well understood. Therefore, it is critical to understand their evolutionary history and relationships by finding additional fossil taxa. Here, we describe a new small-sized fossil anthropoid primate from the Late Eocene Krabi locality in Thailand, Krabia minuta, which shares several derived characters with the amphipithecids. It displays several unique dental characters, such as extreme bunodonty and reduced trigon surface area, that have never been observed in other Eocene Asian anthropoids. These features indicate that morphological adaptations were more diversified among amphipithecids than was previously expected, and raises the problem of the phylogenetic relations between the crown anthropoids and their stem group eosimiiforms, on one side, and the modern anthropoids, on the other side.
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Affiliation(s)
- Yaowalak Chaimanee
- IPHEP: Institut de Paléoprimatologie, Paléontologie Humaine : Évolution et Paléoenvironnements, CNRS UMR 7262, Université de Poitiers, , 6 rue Michel Brunet, 86022 Poitiers cedex, France
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Gladman JT, Boyer DM, Simons EL, Seiffert ER. A calcaneus attributable to the primitive late Eocene anthropoid Proteopithecus sylviae: phenetic affinities and phylogenetic implications. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 151:372-97. [PMID: 23794332 DOI: 10.1002/ajpa.22266] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 02/24/2013] [Indexed: 11/10/2022]
Abstract
A well-preserved calcaneus referrable to Proteopithecus sylviae from the late Eocene Quarry L-41 in the Fayum Depression, Egypt, provides new evidence relevant to this taxon's uncertain phylogenetic position. We assess morphological affinities of the new specimen using three-dimensional geometric morphometric analyses with a comparative sample of primate calcanei representing major extinct and extant radiations (n = 58 genera, 106 specimens). Our analyses reveal that the calcaneal morphology of Proteopithecus is most similar to that of the younger Fayum parapithecid Apidium. Principal components analysis places Apidium and Proteopithecus in an intermediate position between primitive euprimates and crown anthropoids, based primarily on landmark configurations corresponding to moderate distal elongation, a more distal position of the peroneal tubercle, and a relatively "unflexed" calcaneal body. Proteopithecus and Apidium are similar to cercopithecoids and some omomyiforms in having an ectal facet that is more tightly curved, along with a larger degree of proximal calcaneal elongation, whereas other Fayum anthropoids, platyrrhines and adapiforms have a more open facet with less proximal elongation. The similarity to cercopithecoids is most plausibly interpreted as convergence given the less tightly curved ectal facets of stem catarrhines. The primary similarities between Proteopithecus and platyrrhines are mainly in the moderate distal elongation and the more distal position of the peroneal tubercle, both of which are not unique to these groups. Proteopithecus and Apidium exhibit derived anthropoid features, but also a suite of primitive retentions. The calcaneal morphology of Proteopithecus is consistent with our cladistic analysis, which places proteopithecids as a sister group of Parapithecoidea.
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Affiliation(s)
- Justin T Gladman
- Department of Anthropology, The Graduate Center, City University of New York, New York, NY 10016-4309, USA.
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25
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Guy F, Gouvard F, Boistel R, Euriat A, Lazzari V. Prospective in (Primate) dental analysis through tooth 3D topographical quantification. PLoS One 2013; 8:e66142. [PMID: 23826088 PMCID: PMC3691165 DOI: 10.1371/journal.pone.0066142] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Accepted: 05/01/2013] [Indexed: 12/03/2022] Open
Abstract
The occlusal morphology of the teeth is mostly determined by the enamel-dentine junction morphology; the enamel-dentine junction plays the role of a primer and conditions the formation of the occlusal enamel reliefs. However, the accretion of the enamel cap yields thickness variations that alter the morphology and the topography of the enamel–dentine junction (i.e., the differential deposition of enamel by the ameloblasts create an external surface that does not necessarily perfectly parallel the enamel–dentine junction). This self-reliant influence of the enamel on tooth morphology is poorly understood and still under-investigated. Studies considering the relationship between enamel and dentine morphologies are rare, and none of them tackled this relationship in a quantitative way. Major limitations arose from: (1) the difficulties to characterize the tooth morphology in its comprehensive tridimensional aspect and (2) practical issues in relating enamel and enamel–dentine junction quantitative traits. We present new aspects of form representation based exclusively on 3D analytical tools and procedures. Our method is applied to a set of 21 unworn upper second molars belonging to eight extant anthropoid genera. Using geometrical analysis of polygonal meshes representatives of the tooth form, we propose a 3D dataset that constitutes a detailed characterization of the enamel and of the enamel–dentine junction morphologies. Also, for the first time, to our knowledge, we intend to establish a quantitative method for comparing enamel and enamel–dentine junction surfaces descriptors (elevation, inclination, orientation, etc.). New indices that allow characterizing the occlusal morphology are proposed and discussed. In this note, we present technical aspects of our method with the example of anthropoid molars. First results show notable individual variations and taxonomic heterogeneities for the selected topographic parameters and for the pattern and strength of association between enamel–dentine junction and enamel, the enamel cap altering in different ways the “transcription” of the enamel–dentine junction morphology.
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Affiliation(s)
- Franck Guy
- Centre National de la Recherche Scientifique, Institut Ecologie et Environnement, UMR 7262 - iPHEP: Institut de Paléoprimatologie et Paléontologie Humaine, Evolution et Paléoenvironnements, Université de Poitiers, Faculté des Sciences, Poitiers, France.
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26
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Boyer DM, Seiffert ER. Patterns of astragalar fibular facet orientation in extant and fossil primates and their evolutionary implications. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 151:420-47. [DOI: 10.1002/ajpa.22283] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 03/28/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Doug M. Boyer
- Department of Evolutionary Anthropology; Duke University; Durham; NC; 27708
| | - Erik R. Seiffert
- Department of Anatomical Sciences; Stony Brook University, Health Sciences Center T-8; Stony Brook; NY; 11794-8081
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Abstract
When people learn that I study human evolution and we start talking about it, they sometimes ask me, "How long ago did the first humans live?" My answer is usually another question: "What do you mean by 'humans'?" That response seems as baffling and wrong-headed to them as their question seems to me, and it usually takes us a while to straighten things out. © 2012 Wiley Periodicals, Inc.
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Abstract
The peculiar mammalian fauna that inhabited Afro-Arabia during the Paleogene first came to the attention of the scientific community in the early part of the twentieth century, when Andrews1 and Schlosser2 published their landmark descriptions of fossil mammals from the Fayum Depression in northern Egypt. Their studies revealed a highly endemic assemblage of land mammals that included the first known Paleogene records of hyraxes, proboscideans, and anthropoid primates, but which lacked ancestors of many iconic mammalian lineages that are found in Africa today, such as rhinos, zebras, bovids, giraffes, and cats. Over the course of the last century, the Afro-Arabian Paleogene has yielded fossil remains of several other endemic mammalian lineages,3 as well as a diversity of prosimian primates,4 but we are only just beginning to understand how the continent's faunal composition came to be, through ancient processes such as the movement of tectonic plates, changes in climate and sea level, and early phylogenetic splits among the major groups of placental mammals. These processes, in turn, made possible chance dispersal events that were critical in determining the competitive landscape--and, indeed, the survival--of our earliest anthropoid ancestors. Newly discovered fossils indicate that the persistence and later diversification of Anthropoidea was not an inevitable result of the clade's competitive isolation or adaptive superiority, as has often been assumed, but rather was as much due to the combined influences of serendipitous geographic conditions, global cooling, and competition with a group of distantly related extinct strepsirrhines with anthropoid-like adaptations known as adapiforms. Many of the important details of this story would not be known, and could never have been predicted, without the fossil evidence that has recently been unearthed by field paleontologists.
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Affiliation(s)
- Erik R Seiffert
- Department of Anatomical Sciences, Stony Brook University, USA.
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Urbani B, Youlatos D. Positional behavior and substrate use of Micromys minutus (Rodentia: Muridae): insights for understanding primate origins. J Hum Evol 2012; 64:130-6. [PMID: 23228949 DOI: 10.1016/j.jhevol.2012.10.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 10/13/2012] [Accepted: 10/15/2012] [Indexed: 11/28/2022]
Abstract
Several hypotheses have been proposed to explain the origins of primates, suggesting evolutionary scenarios that are usually paralleled to modern mammalian models that partly simulate the morpho-behavioral apomorphies of primates. The current study examines substrate use and positional behavior of tiny-sized Eurasian harvest mice (Micromys minutus) as living models for inferring the evolution of versatile behavior, flexible branch use and pedal grasping in early small-sized primates. Micromys exhibits a diverse locomotor repertoire composed of clambering and climbing, and uses postural modes requiring secure pedal grasping. It also makes considerable use of fine flexible substrates of various inclinations during both feeding/foraging and traveling. This profile seems to represent an intermediate step between stage 2 (Tupaia-stage) and stage 3 (Caluromys-stage) in Sargis et al.'s (2007) primate evolutionary scenario. Furthermore, our findings suggest that tiny size in itself brings a unique level of flexibility in posture and locomotion that has heretofore been underappreciated in the primate evolution literature.
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Affiliation(s)
- Bernardo Urbani
- Centro de Antropología, Instituto Venezolano de Investigaciones Científicas, Apartado 66.755, Caracas 1061-A, Venezuela.
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Springer MS, Meredith RW, Gatesy J, Emerling CA, Park J, Rabosky DL, Stadler T, Steiner C, Ryder OA, Janečka JE, Fisher CA, Murphy WJ. Macroevolutionary dynamics and historical biogeography of primate diversification inferred from a species supermatrix. PLoS One 2012; 7:e49521. [PMID: 23166696 PMCID: PMC3500307 DOI: 10.1371/journal.pone.0049521] [Citation(s) in RCA: 270] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 10/09/2012] [Indexed: 01/24/2023] Open
Abstract
Phylogenetic relationships, divergence times, and patterns of biogeographic descent among primate species are both complex and contentious. Here, we generate a robust molecular phylogeny for 70 primate genera and 367 primate species based on a concatenation of 69 nuclear gene segments and ten mitochondrial gene sequences, most of which were extracted from GenBank. Relaxed clock analyses of divergence times with 14 fossil-calibrated nodes suggest that living Primates last shared a common ancestor 71-63 Ma, and that divergences within both Strepsirrhini and Haplorhini are entirely post-Cretaceous. These results are consistent with the hypothesis that the Cretaceous-Paleogene mass extinction of non-avian dinosaurs played an important role in the diversification of placental mammals. Previous queries into primate historical biogeography have suggested Africa, Asia, Europe, or North America as the ancestral area of crown primates, but were based on methods that were coopted from phylogeny reconstruction. By contrast, we analyzed our molecular phylogeny with two methods that were developed explicitly for ancestral area reconstruction, and find support for the hypothesis that the most recent common ancestor of living Primates resided in Asia. Analyses of primate macroevolutionary dynamics provide support for a diversification rate increase in the late Miocene, possibly in response to elevated global mean temperatures, and are consistent with the fossil record. By contrast, diversification analyses failed to detect evidence for rate-shift changes near the Eocene-Oligocene boundary even though the fossil record provides clear evidence for a major turnover event ("Grande Coupure") at this time. Our results highlight the power and limitations of inferring diversification dynamics from molecular phylogenies, as well as the sensitivity of diversification analyses to different species concepts.
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Affiliation(s)
- Mark S. Springer
- Department of Biology, University of California Riverside, Riverside, California, United States of America
| | - Robert W. Meredith
- Department of Biology, University of California Riverside, Riverside, California, United States of America
- Department of Biology and Molecular Biology, Montclair State University, Montclair, New Jersey, United States of America
| | - John Gatesy
- Department of Biology, University of California Riverside, Riverside, California, United States of America
| | - Christopher A. Emerling
- Department of Biology, University of California Riverside, Riverside, California, United States of America
| | - Jong Park
- Department of Biology, University of California Riverside, Riverside, California, United States of America
- Department of Biology, University of Washington, Seattle, Washington, United States of America
| | - Daniel L. Rabosky
- Department of Integrative Biology, University of California, Berkeley, California, United States of America
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Tanja Stadler
- Institut für Integrative Biologie, Eidgenössiche Technische Hochschule Zurich, Zurich, Switzerland
| | - Cynthia Steiner
- San Diego Zoo Institute for Conservation Research, San Diego Zoo Global, San Diego, California, United States of America
| | - Oliver A. Ryder
- San Diego Zoo Institute for Conservation Research, San Diego Zoo Global, San Diego, California, United States of America
| | - Jan E. Janečka
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, Texas, United States of America
| | - Colleen A. Fisher
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, Texas, United States of America
| | - William J. Murphy
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, Texas, United States of America
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Primate phylogeny: molecular evidence for a pongid clade excluding humans and a prosimian clade containing tarsiers. SCIENCE CHINA-LIFE SCIENCES 2012; 55:709-25. [DOI: 10.1007/s11427-012-4350-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Accepted: 06/28/2012] [Indexed: 10/27/2022]
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Late Middle Eocene primate from Myanmar and the initial anthropoid colonization of Africa. Proc Natl Acad Sci U S A 2012; 109:10293-7. [PMID: 22665790 DOI: 10.1073/pnas.1200644109] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Reconstructing the origin and early evolutionary history of anthropoid primates (monkeys, apes, and humans) is a current focus of paleoprimatology. Although earlier hypotheses frequently supported an African origin for anthropoids, recent discoveries of older and phylogenetically more basal fossils in China and Myanmar indicate that the group originated in Asia. Given the Oligocene-Recent history of African anthropoids, the colonization of Africa by early anthropoids hailing from Asia was a decisive event in primate evolution. However, the fossil record has so far failed to constrain the nature and timing of this pivotal event. Here we describe a fossil primate from the late middle Eocene Pondaung Formation of Myanmar, Afrasia djijidae gen. et sp. nov., that is remarkably similar to, yet dentally more primitive than, the roughly contemporaneous North African anthropoid Afrotarsius. Phylogenetic analysis suggests that Afrasia and Afrotarsius are sister taxa within a basal anthropoid clade designated as the infraorder Eosimiiformes. Current knowledge of eosimiiform relationships and their distribution through space and time suggests that members of this clade dispersed from Asia to Africa sometime during the middle Eocene, shortly before their first appearance in the African fossil record. Crown anthropoids and their nearest fossil relatives do not appear to be specially related to Afrotarsius, suggesting one or more additional episodes of dispersal from Asia to Africa. Hystricognathous rodents, anthracotheres, and possibly other Asian mammal groups seem to have colonized Africa at roughly the same time or shortly after anthropoids gained their first toehold there.
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Morphometric analysis of cranial shape in fossil and recent euprimates. ANATOMY RESEARCH INTERNATIONAL 2012; 2012:478903. [PMID: 22611497 PMCID: PMC3352253 DOI: 10.1155/2012/478903] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 02/16/2012] [Indexed: 11/18/2022]
Abstract
Quantitative analysis of morphology allows for identification of subtle evolutionary patterns or convergences in anatomy that can aid ecological reconstructions of extinct taxa. This study explores diversity and convergence in cranial morphology across living and fossil primates using geometric morphometrics. 33 3D landmarks were gathered from 34 genera of euprimates (382 specimens), including the Eocene adapiforms Adapis and Leptadapis and Quaternary lemurs Archaeolemur, Palaeopropithecus, and Megaladapis. Landmark data was treated with Procrustes superimposition to remove all nonshape differences and then subjected to principal components analysis and linear discriminant function analysis. Haplorhines and strepsirrhines were well separated in morphospace along the major components of variation, largely reflecting differences in relative skull length and width and facial depth. Most adapiforms fell within or close to strepsirrhine space, while Quaternary lemurs deviated from extant strepsirrhines, either exploring new regions of morphospace or converging on haplorhines. Fossil taxa significantly increased the area of morphospace occupied by strepsirrhines. However, recent haplorhines showed significantly greater cranial disparity than strepsirrhines, even with the inclusion of the unusual Quaternary lemurs, demonstrating that differences in primate cranial disparity are likely real and not simply an artefact of recent megafaunal extinctions.
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Maiolino S, Boyer DM, Bloch JI, Gilbert CC, Groenke J. Evidence for a grooming claw in a North American adapiform primate: implications for anthropoid origins. PLoS One 2012; 7:e29135. [PMID: 22253707 PMCID: PMC3254620 DOI: 10.1371/journal.pone.0029135] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 11/21/2011] [Indexed: 11/19/2022] Open
Abstract
Among fossil primates, the Eocene adapiforms have been suggested as the closest relatives of living anthropoids (monkeys, apes, and humans). Central to this argument is the form of the second pedal digit. Extant strepsirrhines and tarsiers possess a grooming claw on this digit, while most anthropoids have a nail. While controversial, the possible presence of a nail in certain European adapiforms has been considered evidence for anthropoid affinities. Skeletons preserved well enough to test this idea have been lacking for North American adapiforms. Here, we document and quantitatively analyze, for the first time, a dentally associated skeleton of Notharctus tenebrosus from the early Eocene of Wyoming that preserves the complete bones of digit II in semi-articulation. Utilizing twelve shape variables, we compare the distal phalanges of Notharctus tenebrosus to those of extant primates that bear nails (n = 21), tegulae (n = 4), and grooming claws (n = 10), and those of non-primates that bear claws (n = 7). Quantitative analyses demonstrate that Notharctus tenebrosus possessed a grooming claw with a surprisingly well-developed apical tuft on its second pedal digit. The presence of a wide apical tuft on the pedal digit II of Notharctus tenebrosus may reflect intermediate morphology between a typical grooming claw and a nail, which is consistent with the recent hypothesis that loss of a grooming claw occurred in a clade containing adapiforms (e.g. Darwinius masillae) and anthropoids. However, a cladistic analysis including newly documented morphologies and thorough representation of characters acknowledged to have states constituting strepsirrhine, haplorhine, and anthropoid synapomorphies groups Notharctus tenebrosus and Darwinius masillae with extant strepsirrhines rather than haplorhines suggesting that the form of pedal digit II reflects substantial homoplasy during the course of early primate evolution.
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Affiliation(s)
| | - Doug M. Boyer
- Brooklyn College, City University of New York, Brooklyn, New York, United States of America
| | - Jonathan I. Bloch
- Florida Museum of Natural History, University of Florida, Gainesville, Florida, United States of America
| | - Christopher C. Gilbert
- Hunter College, City University of New York, New York, New York, United States of America
| | - Joseph Groenke
- Stony Brook University, Stony Brook, New York, United States of America
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Springer MS, Meredith RW, Janecka JE, Murphy WJ. The historical biogeography of Mammalia. Philos Trans R Soc Lond B Biol Sci 2011; 366:2478-502. [PMID: 21807730 DOI: 10.1098/rstb.2011.0023] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Palaeobiogeographic reconstructions are underpinned by phylogenies, divergence times and ancestral area reconstructions, which together yield ancestral area chronograms that provide a basis for proposing and testing hypotheses of dispersal and vicariance. Methods for area coding include multi-state coding with a single character, binary coding with multiple characters and string coding. Ancestral reconstruction methods are divided into parsimony versus Bayesian/likelihood approaches. We compared nine methods for reconstructing ancestral areas for placental mammals. Ambiguous reconstructions were a problem for all methods. Important differences resulted from coding areas based on the geographical ranges of extant species versus the geographical provenance of the oldest fossil for each lineage. Africa and South America were reconstructed as the ancestral areas for Afrotheria and Xenarthra, respectively. Most methods reconstructed Eurasia as the ancestral area for Boreoeutheria, Euarchontoglires and Laurasiatheria. The coincidence of molecular dates for the separation of Afrotheria and Xenarthra at approximately 100 Ma with the plate tectonic sundering of Africa and South America hints at the importance of vicariance in the early history of Placentalia. Dispersal has also been important including the origins of Madagascar's endemic mammal fauna. Further studies will benefit from increased taxon sampling and the application of new ancestral area reconstruction methods.
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Affiliation(s)
- Mark S Springer
- Department of Biology, University of California, Riverside, CA 92521, USA.
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Primates of the genus Altanius (Mammalia, Primates) from the Lower Eocene of Tsagan-Khushu, southern Mongolia. RUSSIAN JOURNAL OF THERIOLOGY 2011. [DOI: 10.15298/rusjtheriol.09.2.02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rosenberger AL. The Face of Strigorhysis: Implications of Another Tarsier-like, Large-Eyed Eocene North American Tarsiiform Primate. Anat Rec (Hoboken) 2011; 294:797-812. [DOI: 10.1002/ar.21367] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Accepted: 11/03/2010] [Indexed: 11/06/2022]
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Perelman P, Johnson WE, Roos C, Seuánez HN, Horvath JE, Moreira MAM, Kessing B, Pontius J, Roelke M, Rumpler Y, Schneider MPC, Silva A, O'Brien SJ, Pecon-Slattery J. A molecular phylogeny of living primates. PLoS Genet 2011; 7:e1001342. [PMID: 21436896 PMCID: PMC3060065 DOI: 10.1371/journal.pgen.1001342] [Citation(s) in RCA: 857] [Impact Index Per Article: 65.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Accepted: 02/16/2011] [Indexed: 12/13/2022] Open
Abstract
Comparative genomic analyses of primates offer considerable potential to define and understand the processes that mold, shape, and transform the human genome. However, primate taxonomy is both complex and controversial, with marginal unifying consensus of the evolutionary hierarchy of extant primate species. Here we provide new genomic sequence (∼8 Mb) from 186 primates representing 61 (∼90%) of the described genera, and we include outgroup species from Dermoptera, Scandentia, and Lagomorpha. The resultant phylogeny is exceptionally robust and illuminates events in primate evolution from ancient to recent, clarifying numerous taxonomic controversies and providing new data on human evolution. Ongoing speciation, reticulate evolution, ancient relic lineages, unequal rates of evolution, and disparate distributions of insertions/deletions among the reconstructed primate lineages are uncovered. Our resolution of the primate phylogeny provides an essential evolutionary framework with far-reaching applications including: human selection and adaptation, global emergence of zoonotic diseases, mammalian comparative genomics, primate taxonomy, and conservation of endangered species. Advances in human biomedicine, including those focused on changes in genes triggered or disrupted in development, resistance/susceptibility to infectious disease, cancers, mechanisms of recombination, and genome plasticity, cannot be adequately interpreted in the absence of a precise evolutionary context or hierarchy. However, little is known about the genomes of other primate species, a situation exacerbated by a paucity of nuclear molecular sequence data necessary to resolve the complexities of primate divergence over time. We overcome this deficiency by sequencing 54 nuclear gene regions from DNA samples representing ∼90% of the diversity present in living primates. We conduct a phylogenetic analysis to determine the origin, evolution, patterns of speciation, and unique features in genome divergence among primate lineages. The resultant phylogenetic tree is remarkably robust and unambiguously resolves many long-standing issues in primate taxonomy. Our data provide a strong foundation for illuminating those genomic differences that are uniquely human and provide new insights on the breadth and richness of gene evolution across all primate lineages.
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Affiliation(s)
- Polina Perelman
- Laboratory of Genomic Diversity, National Cancer Institute–Frederick, Frederick, Maryland, United States of America
| | - Warren E. Johnson
- Laboratory of Genomic Diversity, National Cancer Institute–Frederick, Frederick, Maryland, United States of America
| | - Christian Roos
- Gene Bank of Primates and Primate Genetics Laboratory, German Primate Center, Göttingen, Germany
| | - Hector N. Seuánez
- Division of Genetics, Instituto Nacional de Câncer and Department of Genetics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Julie E. Horvath
- Department of Evolutionary Anthropology and Institute for Genome Sciences and Policy, Duke University, Durham, North Carolina, United States of America
| | - Miguel A. M. Moreira
- Division of Genetics, Instituto Nacional de Câncer and Department of Genetics, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bailey Kessing
- SAIC–Frederick, Laboratory of Genomic Diversity, National Cancer Institute–Frederick, Frederick, Maryland, United States of America
| | - Joan Pontius
- SAIC–Frederick, Laboratory of Genomic Diversity, National Cancer Institute–Frederick, Frederick, Maryland, United States of America
| | - Melody Roelke
- SAIC–Frederick, Laboratory of Genomic Diversity, National Cancer Institute–Frederick, Frederick, Maryland, United States of America
| | - Yves Rumpler
- Physiopathologie et Médecine Translationnelle, Faculté de Médecine, Université Louis Pasteur, Strasbourg, France
| | | | | | - Stephen J. O'Brien
- Laboratory of Genomic Diversity, National Cancer Institute–Frederick, Frederick, Maryland, United States of America
| | - Jill Pecon-Slattery
- Laboratory of Genomic Diversity, National Cancer Institute–Frederick, Frederick, Maryland, United States of America
- * E-mail:
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Boyer DM, Seiffert ER, Simons EL. Astragalar morphology of Afradapis, a large adapiform primate from the earliest late Eocene of Egypt. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2011; 143:383-402. [PMID: 20949610 DOI: 10.1002/ajpa.21328] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The ∼37 million-year-old Birket Qarun Locality 2 (BQ-2), in the Birket Qarun Formation of Egypt's Fayum Depression, yields evidence for a diverse primate fauna, including the earliest known lorisiforms, parapithecoid anthropoids, and Afradapis longicristatus, a large folivorous adapiform. Phylogenetic analysis has placed Afradapis as a stem strepsirrhine within a clade of caenopithecine adapiforms, contradicting the recently popularized alternative hypothesis aligning adapiforms with haplorhines or anthropoids. We describe an astragalus from BQ-2 (DPC 21445C), attributable to Afradapis on the basis of size and relative abundance. The astragalus is remarkably similar to those of extant lorises, having a low body, no posterior shelf, a broad head and neck. It is like extant strepsirrhines more generally, in having a fibular facet that slopes gently away from the lateral tibial facet, and in having a groove for the tendon of flexor fibularis that is lateral to the tibial facet. Comparisons to a sample of euarchontan astragali show the new fossil to be most similar to those of adapines and lorisids. The astragali of other adapiforms are most similar to those of lemurs, but distinctly different from those of all anthropoids. Our measurements show that in extant strepsirrhines and adapiforms the fibular facet slopes away from the lateral tibial facet at a gradual angle (112-126°), in contrast to the anthropoid fibular facet, which forms a sharper angle (87-101°). Phylogenetic analyses incorporating new information from the astragalus continue to support strepsirrhine affinities for adapiforms under varying models of character evolution.
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Affiliation(s)
- Doug M Boyer
- Department of Anthropology and Archaeology, Brooklyn College, City University of New York, Brooklyn, NY 11210, USA.
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Gingerich PD, Franzen JL, Habersetzer J, Hurum JH, Smith BH. Darwinius masillae is a Haplorhine — Reply to Williams et al. (2010). J Hum Evol 2010. [DOI: 10.1016/j.jhevol.2010.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Williams BA, Kay RF, Christopher Kirk E, Ross CF. Darwinius masillae is a strepsirrhine—a reply to Franzen et al. (2009). J Hum Evol 2010; 59:567-73; discussion 574-9. [DOI: 10.1016/j.jhevol.2010.01.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2009] [Revised: 10/21/2009] [Accepted: 11/02/2009] [Indexed: 10/19/2022]
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43
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Ramdarshan A, Merceron G, Tafforeau P, Marivaux L. Dietary reconstruction of the Amphipithecidae (Primates, Anthropoidea) from the Paleogene of South Asia and paleoecological implications. J Hum Evol 2010; 59:96-108. [PMID: 20510435 DOI: 10.1016/j.jhevol.2010.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Revised: 03/16/2010] [Accepted: 04/21/2010] [Indexed: 11/25/2022]
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Abstract
Adaptive shifts associated with human origins are brought to light as we examine the human fossil record and study our own genome and that of our closest ape relatives. However, the more ancient roots of many human characteristics are revealed through the study of a broader array of living anthropoids and the increasingly dense fossil record of the earliest anthropoid radiations. Genomic data and fossils of early primates in Asia and Africa clarify relationships among the major clades of primates. Progress in comparative anatomy, genomics, and molecular biology point to key changes in sensory ecology and brain organization that ultimately set the stage for the emergence of the human lineage.
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45
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Heads M. Evolution and biogeography of primates: a new model based on molecular phylogenetics, vicariance and plate tectonics. ZOOL SCR 2010. [DOI: 10.1111/j.1463-6409.2009.00411.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Prasad GVR. Divergence time estimates of mammals from molecular clocks and fossils: relevance of new fossil finds from India. J Biosci 2010; 34:649-59. [PMID: 20009262 DOI: 10.1007/s12038-009-0063-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper presents a brief review of recent advances in the classification of mammals at higher levels using fossils and molecular clocks. It also discusses latest fossil discoveries from the Cretaceous - Eocene (66-55 m.y.) rocks of India and their relevance to our current understanding of placental mammal origins and diversifications.
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Affiliation(s)
- G V R Prasad
- Indian Institute of Science Education and Research (IISER-K), BCKV Main Campus, Mohanpur 741 252, India.
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48
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Tabuce R, Marivaux L, Lebrun R, Adaci M, Bensalah M, Fabre PH, Fara E, Gomes Rodrigues H, Hautier L, Jaeger JJ, Lazzari V, Mebrouk F, Peigné S, Sudre J, Tafforeau P, Valentin X, Mahboubi M. Anthropoid versus strepsirhine status of the African Eocene primates Algeripithecus and Azibius: craniodental evidence. Proc Biol Sci 2009; 276:4087-94. [PMID: 19740889 DOI: 10.1098/rspb.2009.1339] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Recent fossil discoveries have demonstrated that Africa and Asia were epicentres for the origin and/or early diversification of the major living primate lineages, including both anthropoids (monkeys, apes and humans) and crown strepsirhine primates (lemurs, lorises and galagos). Competing hypotheses favouring either an African or Asian origin for anthropoids rank among the most hotly contested issues in paleoprimatology. The Afrocentric model for anthropoid origins rests heavily on the >45 Myr old fossil Algeripithecus minutus from Algeria, which is widely acknowledged to be one of the oldest known anthropoids. However, the phylogenetic position of Algeripithecus with respect to other primates has been tenuous because of the highly fragmentary fossils that have documented this primate until now. Recently recovered and more nearly complete fossils of Algeripithecus and contemporaneous relatives reveal that they are not anthropoids. New data support the idea that Algeripithecus and its sister genus Azibius are the earliest offshoots of an Afro-Arabian strepsirhine clade that embraces extant toothcombed primates and their fossil relatives. Azibius exhibits anatomical evidence for nocturnality. Algeripithecus has a long, thin and forwardly inclined lower canine alveolus, a feature that is entirely compatible with the long and procumbent lower canine included in the toothcomb of crown strepsirhines. These results strengthen an ancient African origin for crown strepsirhines and, in turn, strongly challenge the role of Africa as the ancestral homeland for anthropoids.
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Affiliation(s)
- Rodolphe Tabuce
- Institut des Sciences de l'Evolution UMR5554, cc064, Université Montpellier II, place Eugène Bataillon, 34095 Montpellier cedex 05, France.
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Kay RF. Much Hype and Many Errors
The Link
Uncovering Our Earliest Ancestor
by Colin Tudge, with Josh Young
Little, Brown, New York, 2009. 304 pp. $25.99, C$28.99. ISBN 9780316070089. Science 2009. [DOI: 10.1126/science.1177071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
This account of
Darwinius masillae
, its discovery, and its importance was rushed into print as part of the hype surrounding the public announcement of the work.
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Affiliation(s)
- Richard F. Kay
- The reviewer is at the Department of Evolutionary Anthropology, Box 90383, Duke University, Durham, NC 27708–0383, USA
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Beard KC, Marivaux L, Chaimanee Y, Jaeger JJ, Marandat B, Tafforeau P, Soe AN, Tun ST, Kyaw AA. A new primate from the Eocene Pondaung Formation of Myanmar and the monophyly of Burmese amphipithecids. Proc Biol Sci 2009; 276:3285-94. [PMID: 19570790 DOI: 10.1098/rspb.2009.0836] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The family Amphipithecidae is one of the two fossil primate taxa from Asia that appear to be early members of the anthropoid clade. Ganlea megacanina, gen. et sp. nov., is a new amphipithecid from the late middle Eocene Pondaung Formation of central Myanmar. The holotype of Ganlea is distinctive in having a relatively enormous lower canine showing heavy apical wear, indicating an important functional role of the lower canine in food preparation and ingestion. A phylogenetic analysis of amphipithecid relationships suggests that Ganlea is the sister taxon of Myanmarpithecus, a relatively small-bodied taxon that has often, but not always, been included in Amphipithecidae. Pondaungia is the sister taxon of the Ganlea + Myanmarpithecus clade. All three Pondaung amphipithecid genera are monophyletic with respect to Siamopithecus, which is the most basal amphipithecid currently known. The inclusion of Myanmarpithecus in Amphipithecidae diminishes the likelihood that amphipithecids are specially related to adapiform primates. Extremely heavy apical wear has been documented on the lower canines of all three genera of Burmese amphipithecids. This distinctive wear pattern suggests that Burmese amphipithecids were an endemic radiation of hard object feeders that may have been ecological analogues of living New World pitheciin monkeys.
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Affiliation(s)
- K Christopher Beard
- Section of Vertebrate Paleontology, Carnegie Museum of Natural History, Pittsburgh, PA 15213, USA.
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