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| http://dx.doi.org/10.1073/pnas.19.11.954 | DOI Listing |
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Maxilla of Siamopithecus eocaenus (Anthropoidea, Primates) from the Paleogene of Krabi, Thailand, and its taxonomic status.
J Hum Evol
January 2025
Laboratory Paleontology, Evolution, Paleoecosystems and Paleoprimatology (PALEVOPRIM), UMR 7262 CNRS, University of Poitiers, France.
Detailed descriptions of the maxillae of Siamopithecus eocaenus, discovered from the latest Eocene/earliest Oligocene lignite mine in the Krabi basin of Peninsular Thailand, are presented. They include the morphology of P-M, the palate, a partial orbital region, and the zygomatic root. The specimen exhibits distinctive dental features including a single-rooted P alveolus, a protocone on the P and P, and a true hypocone on the upper molars, indicating its derived anthropoid dentition.
View Article and Find Full Text PDFNew primates from the middle Eocene of the Sand Wash Basin, northwestern Colorado.
J Hum Evol
December 2024
Department of Anatomy, Des Moines University, 8025 Grand Ave, Des Moines, IA, 50266, USA. Electronic address:
The transition between the Bridgerian and Uintan North American Land Mammal Ages of the middle Eocene is a pivotal time in the evolution of modern mammal ecosystems in North America, marking the beginning of a global cooling trend that led to the recession of tropical forests and gradual faunal turnover on the continent. However, few mammalian faunas are known from this time period, leading to difficulty characterizing and recognizing early Uintan faunal assemblages. The Sand Wash Basin in northwestern Colorado has been suggested to yield fossil faunas of early Uintan age, but fossils from the Sand Wash Basin have not been formally described since the 1970s despite active field work in the region.
View Article and Find Full Text PDFA new primate community from the earliest Oligocene of the Atlantic margin of Northwest Africa: Systematic, paleobiogeographic, and paleoenvironmental implications.
J Hum Evol
August 2024
Laboratoire Paléontologie Évolution Paléoécosystèmes Paléoprimatologie (PALEVOPRIM, UMR-CNRS 7262), Université de Poitiers UFR SFA, 6 Rue Michel Brunet, F-86022 Poitiers Cedex, France.
We report a new Paleogene primate community discovered in the uppermost part of the Samlat Formation outcropping on the continental shore of the Rio de Oro, east of the Dakhla peninsula (in the south of Morocco, near the northern border of Mauritania). Fossils consist of isolated teeth, which were extracted by wet screening of estuarine sediments (DAK C) dating from the earliest Oligocene (ca. 33.
View Article and Find Full Text PDFDental caries in living and extinct strepsirrhines with insights into diet.
Anat Rec (Hoboken)
June 2024
Division of Paleontology, American Museum of Natural History, New York, New York, USA.
Dental caries is one of the most common diseases afflicting modern humans and occurs in both living and extinct non-human primates, as well as other mammalian species. Compared to other primates, less is known about the etiology or frequency of caries among the Strepsirrhini. Given the link between caries and diet, caries frequency may be informative about the dietary ecology of a given animal.
View Article and Find Full Text PDFEarly anthropoid primates: New data and new questions.
Evol Anthropol
June 2024
Laboratory PALEVOPRIM, UMR 7262 CNRS, University of Poitiers, Poitiers, France.
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.
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