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First report of the early Eocene pteropods from the Zhepure Formation in Yadong, southern Tibet, China

Published online by Cambridge University Press:  08 May 2020

Xin-fa Li
Affiliation:
State Key Laboratory of Environmental Geology and Biogeology, China University of Geosciences, Beijing, 100083, China , , , School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China
Guo-biao Li*
Affiliation:
State Key Laboratory of Environmental Geology and Biogeology, China University of Geosciences, Beijing, 100083, China , , , School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China
Christopher L. Garvie
Affiliation:
Non-Vertebrate Paleontology Laboratory, Texas Natural Science Center, The University of Texas at Austin, 10100 Burnet Road, Austin, Texas 78758, USA
Tian-yang Wang
Affiliation:
State Key Laboratory of Environmental Geology and Biogeology, China University of Geosciences, Beijing, 100083, China , , , School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China
Jun Zhao
Affiliation:
State Key Laboratory of Environmental Geology and Biogeology, China University of Geosciences, Beijing, 100083, China , , , School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China
*
*Corresponding author.

Abstract

During recent stratigraphical and micropaleontological investigations of the Gulupu section in Tüna, Yadong, of the Eocene Zhepure Formation, numerous holoplanktonic mollusks (pteropods) were recovered. Four species, assignable to two genera of pteropods (including Limacina yadongensis new species) were systematically described and illustrated, and a gastropod-bivalve biofacies was identified. This is the first report of Eocene (Ypresian) pteropods in southern Tibet; the same stratum also yields many other neritic faunas. The data presented in this study suggest that a semi-closed restricted gulf in the Tüna area existed and the occurrence of pteropods in Tüna may indicate transport from more open, deep water by oceanic currents during early Eocene. Based on the analysis of paleogeographical distribution of pteropods, it indicates that a Tethys seaway existed during the early Eocene (Ypresian).

UUID: http://zoobank.org/7eb6f8dd-a973-4834-986a-310008476eb0

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Copyright
Copyright © 2020, The Paleontological Society

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