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New Nautilida from the Shakhtau Asselian–Sakmarian Reef Complex (Bashkortostan)

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Abstract

This paper describes new nautilids from the Shakhtau Asselian–Sakmarian reef complex. Their place in the nautilid system, which is still far from being completely understood, is discussed. Two species of two genera: Omorphoceras igori gen. et sp. nov. and Stenopoceras (Leptodomatoceras) bashkiricum subgen. et sp. nov. are assigned to the subfamily Domatoceratinae Miller et Youngquist, 1949, family Grypoceratidae Hyatt, 1900. The third, Foveroceras magnum gen. et sp. nov., is included in the exotic family Permoceratidae Miller et Collinson, 1953, which was previously considered monotypic and was known only from the Early Permian of Timor Island. The classification of the family Grypoceratidae is discussed, and the validity of the subfamily Domatoceratinae is questioned. The assumed phylogenetic relationship between the families Grypoceratidae and Permoceratidae is confirmed.

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ACKNOWLEDGMENTS

The authors express their sincere gratitude to A.V. Mazaev, the organizer of field work at Shakhtau for the past eight years. We thank the General Director of AO “Raw Materials Company” A.V. Shkurko, for creating a helpful atmosphere for the work of our team in the quarry. In addition, we are very grateful to our reviewers S.V. Nikolaeva and V.V. Mitta for their comments and suggestions that improved the quality of the paper.

Funding

The work was financially supported by the Russian Science Foundation, project no. 22-24-00099 “Evolution of mollusk communities on the early Permian Shakhtau reef.”

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

    T. B. Leonova & A. Yu. Shedukhin

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  1. T. B. Leonova
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  2. A. Yu. Shedukhin
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Correspondence to T. B. Leonova or A. Yu. Shedukhin.

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Translated by S. Nikolaeva

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Leonova, T.B., Shedukhin, A.Y. New Nautilida from the Shakhtau Asselian–Sakmarian Reef Complex (Bashkortostan). Paleontol. J. 57, 380–391 (2023). https://doi.org/10.1134/S003103012304007X

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