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To the Revision of Freshwater Permian and Triassic Ostracods of the Genus Gerdalia Belousova, 1961

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Abstract

Partial revision of the Permian–Triassic freshwater ostracod genus Gerdalia Belousova, 1961 is performed. The genus is shown to be a collective group. The holotype of the type species G. polenovi Belousova, 1961 is shown to originate from the Late Vyatkian of well 1 near the town of Lyubim, Yaroslavl Region rather than from the Early Urzhumian of the Belebey section (Bashkortostan), as erroneously indicated in the original description. Species that belong to the genus Gerdalia can be divided into six groups according to a combination of morphological features.

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ACKNOWLEDGMENTS

The author is deeply grateful to Prof. A.S. Alekseev, Dr. Sci. (Geol.-Min.) and V.K. Golubev, Cand. Sci. (Geol.-Min.) for help with manuscript writing. The author is grateful to I.I. Molostovskaya, Cand. Sci. (Geol.-Min.), for access to the collections, help with working with the collections, and valuable advice and information. The author is grateful to V.V. Silant’ev, Dr. Sci. (Geol.-Min.), E.L. Zaitseva, Cand. Sci. (Geol.-Min.), T.V. Dmitrieva, M.A. Afanas’eva, and A.S. Bakaev for help in searching for the ostracod collections.

Funding

The study was supported by the Russian Foundation for Basic Research, project nos. 17-04-00410, 17-04-01937, and 18-34-00721.

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  1. Borissiak Paleontological Institute, Russian Academy of Sciences, 117647, Moscow, Russia

    M. A. Naumcheva

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Correspondence to M. A. Naumcheva.

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Translated by S. Semenova

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Naumcheva, M.A. To the Revision of Freshwater Permian and Triassic Ostracods of the Genus Gerdalia Belousova, 1961. Paleontol. J. 53, 1346–1358 (2019). https://doi.org/10.1134/S0031030119120037

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