Abstract
The fossils of the genus Yochelcionella Runnegar et Pojeta, 1974 from the Salaanygol and Khairkhan formations of the Zavkhan structural-facies zone were re-studied as a part of the general revision of malacofauna from the Vendian–Lower Cambrian deposits of Western Mongolia. It was found out that studied strata, in addition to the earlier reported species Y. parva Zhegallo, 1996 and Y. crassa Zhegallo, 1996, contain two other forms identified as Y. chinensis Pei, 1985 and Yochelcionella sp. The species Y. chinensis has the widest distribution among representatives of the genus Yochelcionella and can be successfully used to correlate sediments of remote paleobasins. The diagnosis and composition of the genus Yochelcionella are revised, the species Y. chinensis is described.
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ACKNOWLEDGMENTS
We thank R.A. Rakitov (Borissiak Paleontological Institute, Russian Academy of Sciences) for assistance with the TESCAN VEGA II XMU scanning electron microscope and are grateful to G. Altanshagai, B. Batyrzhav, and B. Enkhbaatar of the Paleontological Institute, Mongolian Academy of Sciences (Ulaanbaatar), for their help in organizing and conducting fieldwork in Western Mongolia in 2022.
Funding
This work was supported by the Russian Foundation for Basic Research (project no. 20-55-44010 Mong_a “Zonal Biostratigraphy of the Vendian–Cambrian Deposits of Western Mongolia”).
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Parkhaev, P.Y., Zhegallo, E.A. & Dorjnamjaa, D. Yochelcionella chinensis (Gastropoda: Helcionelliformes) from the Lower Cambrian of Western Mongolia. Dokl. Earth Sc. 514, 221–227 (2024). https://doi.org/10.1134/S1028334X23602754
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DOI: https://doi.org/10.1134/S1028334X23602754