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New insights on the Early Pleistocene equids from Roca-Neyra (France, central Europe): implications for the Hipparion LAD and the Equus FAD in Europe

Published online by Cambridge University Press:  17 December 2020

Omar Cirilli Open the ORCID record for Omar Cirilli[Opens in a new window] ,
Raymond L. Bernor Open the ORCID record for Raymond L. Bernor[Opens in a new window]  and
Lorenzo Rook Open the ORCID record for Lorenzo Rook[Opens in a new window]
Omar Cirilli*
Affiliation:
Dottorato di Ricerca in Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126Pisa, Italy Dipartimento di Scienze della Terra, Paleo[Fab]Lab, Università degli Studi di Firenze, Via G. La Pira 4, 50121Firenze, Italy
Raymond L. Bernor
Affiliation:
College of Medicine, Department of Anatomy, Laboratory of Evolutionary Biology, 520 W St. N.W., 20059, WashingtonD.C., USA Human Origins Program, Department of Anthropology, Smithsonian Institution, 20560, WashingtonD.C., USA
Lorenzo Rook
Affiliation:
Dipartimento di Scienze della Terra, Paleo[Fab]Lab, Università degli Studi di Firenze, Via G. La Pira 4, 50121Firenze, Italy
*
*Corresponding Author
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Abstract

We undertake a redescription of the equid sample from the Early Pleistocene of Roca-Neyra, France. This locality has been recently calibrated at the Pliocene/Pleistocene boundary (2.6 ± 0.2 Ma) and therefore it is of interest for the first appearance of the genus Equus and last appearance of hipparionine horses. The Roca-Neyra equid sample, re-analyzed herein using morphological, morphometrical, and statistical analyses, has revealed the co-occurrence of Plesiohipparion cf. ?P. rocinantis and Equus cf. E. livenzovensis. The analysis undertaken on several European, African, and Asian “Hipparion” sensu lato species from late Miocene to Early Pleistocene has revealed different remnant Hipparion lineages in the Plio-Pleistocene of Europe: Plesiohipparion, Proboscidippaion, and likely Cremohipparion. The discovery of the first European monodactyl horse, Equus cf. E. livenzovensis correlates Roca-Neyra with other 2.6 Ma European localities in Italy, Spain, and in the Khapry area (Azov Sea region). The morphological description of the Equus cf. E. livenzovensis lower cheek teeth has highlighted intermediate features between the North American Pliocene species Equus simplicidens and Early Pleistocene European Equus stenonis. Our study supports the hypothesis that E. livenzovensis is a plausible evolutionary predecessor for the Equus stenonis group. These observations underscore the importance of Roca-Neyra as an important locality for the last European hipparions and the first Equus in the Early Pleistocene of Europe.

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Journal of Paleontology , Volume 95 , Issue 2 , March 2021 , pp. 406 - 425
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Copyright © The Author(s), 2020. Published by Cambridge University Press on behalf of The Paleontological Society

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