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First Record of the Genus Unionites Wissmann (Bivalvia) in the Boreal Permian of Northeast Russia

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Abstract

Representatives of the bivalve genus Unionites Wissmann are found in the Upper Permian deposits of Northeast Russia, together with the typical high-Boreal Inoceramus-like bivalves Intomodesma sp. Previously, Unionites had been considered exclusively Triassic–Early Jurassic and were only recently found in the Upper Permian of Italy. The finding of representatives of the genus Unionites in the Boreal Upper Permian indicate increased connections of high-Boreal basins and Tethys Superrealm towards the end of the Permian, which began as early as the Middle and Late Wuchiapingian. A new species U. kobyumensis Biakov is described.

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ACKNOWLEDGMENTS

The authors are grateful to I.V. Budnikov, V.I. Davydov, and A.N. Kilyasov for help during field work and S.V. Popov and an anonymous reviewer for their remarks, which significantly improved the manuscript.

Funding

This work was supported by state contracts of NEISRI FEB RAS and Diamond and Precious Metal Geology Institute, Siberian Branch, Russian Academy of Sciences and Russian Foundation for Basic Research (projects nos. 18-05-00191, 20-05-00604), Russian Science Foundation, project no. 19-17-00178 (paleogeographic and paleoclimate conclusions) and, partly, by the subsidy allocated to Kazan Federal University for the state assignment #671-2020-0049 in the sphere of scientific activities.

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Authors and Affiliations

  1. Shilo North-East Interdisciplinary Scientific Research Institute, Far East Branch, Russian Academy of Sciences, 685000, Magadan, Russia

    A. S. Biakov

  2. Kazan (Volga) Federal University, 420008, Kazan, Russia

    A. S. Biakov

  3. Diamond and Precious Metal Geology Institute, Siberian Branch, Russian Academy of Sciences, 677000, Yakutsk, Russia

    R. V. Kutygin

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  1. A. S. Biakov
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  2. R. V. Kutygin
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Correspondence to A. S. Biakov.

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Translated by I. Melekestseva

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Biakov, A.S., Kutygin, R.V. First Record of the Genus Unionites Wissmann (Bivalvia) in the Boreal Permian of Northeast Russia. Paleontol. J. 55, 372–377 (2021). https://doi.org/10.1134/S0031030121040055

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  • DOI: https://doi.org/10.1134/S0031030121040055

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