A NEW SPECIES OF  HAPALODECTES  (HAPALODECTIDAE, MESONYCHIA) FROM THE PALEOCENE OF MONGOLIA

A. V. Lopatin; Лопатин А. В.

doi:10.31857/S2686738923600504

A NEW SPECIES OF HAPALODECTES (HAPALODECTIDAE, MESONYCHIA) FROM THE PALEOCENE OF MONGOLIA

Authors: Lopatin A.V.¹
Affiliations:
1. Borissiak Paleontological Institute, Russian Academy of Sciences
Issue: Vol 513, No 1 (2023)
Pages: 521-527
Section: Articles
URL: https://journals.rcsi.science/2686-7389/article/view/244353
DOI: https://doi.org/10.31857/S2686738923600504
EDN: https://elibrary.ru/YAWUNX
ID: 244353

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Abstract
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Abstract

Hapalodectes paradux sp. nov. (Hapalodectidae, Mesonychia) is described on the base of the dentary fragment with М₂–М₃ from the Tsagan-Khushu locality in Mongolia (Upper Paleocene, Naran Bulak Formation, Zhigden Member). The M₂ and M₃ are approximately the same size, with a high protoconid, anteriorly displaced reduced metaconid, anterolingually directed protocristid, very deep posterior notch, narrow talonid, and distinct hypoconid, entoconid and hypoconulid. Based on dental characters, the new species is presumably related to the base of the lineage of Hapalodectes that dispersed to North America at the beginning of the Eocene. Tsagan-Khushu is the only known locality where two species of Hapalodectes co-occur (larger H. dux Lopatin, 2001 and smaller H. paradux sp. nov.).

Keywords

hapalodectids, mesonychians, Late Paleocene, Mongolia, lower molars, pulp recession, Hapalodectes evolution, species co-occurrence

About the authors

A. V. Lopatin

Borissiak Paleontological Institute, Russian Academy of Sciences

Author for correspondence.
Email: alopat@paleo.ru
Russian Federation, Moscow

References

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