PCI Paleontology

217

Title *

Postcranial anatomy of the long bones of colobines (Mammalia, Primates) from the Plio-Pleistocene Omo Group deposits (Shungura Formation and Usno Formation, 1967-2018 field campaigns, Lower Omo Valley, Ethiopia)use asterix (*) to get italics

Authors *

Laurent Pallas, Guillaume Daver, Gildas Merceron, Jean-Renaud BoisseriePlease use the format "First name initials family name" as in "Marie S. Curie, Niels H. D. Bohr, Albert Einstein, John R. R. Tolkien, Donna T. Strickland"

Year *

2024

Picture *

Abstract *

Our knowledge of the functional and taxonomic diversity of the fossil colobine fauna (Colobinae Jerdon, 1867) from the Lower Omo Valley is based only on craniodental remains. Here we describe postcranial specimens of fossil colobines from the Usno and Shungura Formations, and provide in-depth insights into their functional anatomy and taxonomy. Comparisons with previously described fossil colobine specimens from eastern Africa led us to identify specimens similar to Paracolobus mutiwa Leakey, 1982 and Rhinocolobus turkanaensis Leakey, 1982. Our results highlight the mixed locomotor substrate preferences of Paracolobus mutiwa and add new insights regarding its locomotor behaviors by identifying anatomical characteristics of the forelimb associated with climbing. Postcranial remains reminiscent of Rhinocolobus confirm the peculiar elbow morphology of this taxon and its apparent preference for arboreal substrates. We also document femoral, humeral, and tibial specimens with arboreal traits similar in size and morphology to extant Colobus Illiger, 1811 in Member L of the Shungura Formation. By providing these new data on the colobine paleocommunity from Shungura, our results contribute to the understanding of the biotic context surrounding Plio-Pleistocene faunas of the Turkana Depression and pave the way for future ecomorphological analyses.

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Keywords (optional)

Rhinocolobus, Paracolobus, Colobus, Turkana, Ecomorphology

Methods that require specific expertise (optional)

NonePlease indicate the methods that may require specialised expertise during the peer review process (use a comma to separate various required expertises).

Thematic fields *

Comparative anatomy, Evolutionary patterns and dynamics, Fossil record, Macroevolution, Morphological evolution, Morphometrics, Paleobiology, Systematics, Vertebrate paleontology

Suggested reviewers - Suggest up to 10 reviewers (provide names and Email addresses). (Optional)

Eric Delson - eric.delson@lehman.cuny.edu, Stephen Frost - sfrost@uoregon.edu, Christopher C. Gilbert - cgilbert@hunter.cuny.edu, Nina Jablonski - ngj2@psu.edu

e.g. John Doe john@doe.com

No need for them to be recommenders of PCIPaleo. Please do not suggest reviewers for whom there might be a conflict of interest. Reviewers are not allowed to review preprints written by close colleagues (with whom they have published in the last four years, with whom they have received joint funding in the last four years, or with whom they are currently writing a manuscript, or submitting a grant proposal), or by family members, friends, or anyone for whom bias might affect the nature of the review - see the code of conduct

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Submission date

2023-02-05 06:01:30

Recommender

Stephen Frost

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