Microsculpture study of Late Permian and Early Triassic conchostracans from the Babii Kamen section (Western Siberia)

E.F. Sabirova ^a*, V.V. Zharinova ^b**, F. Scholze ^c***, J.W. Schneider ^a****, I. Kogan ^a*****

^aTechnical University Bergakademie, Freiberg, 09599 Germany

^bKazan Federal University, Kazan, 420008 Russia

^cHessisches Landesmuseum, Darmstadt, 64283 Germany

E-mail: *ElFSabirova@stud.kpfu.ru, **vevzharinova@kpfu.ru, ***frank.scholze@geo.tu-freiberg.de, ****joerg.schneider@geo.tu-freiberg.de, *****ilja.kogan@geo.tu-freiberg.de

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DOI: 10.26907/2542-064X.2019.2.348-357

For citation: Sabirova E.F., Zharinova V.V., Scholze F., Schneider J.W., Kogan I. Microsculpture study of Late Permian and Early Triassic conchostracans from the Babii Kamen section (Western Siberia). Uchenye Zapiski Kazanskogo Universiteta. Seriya Estestvennye Nauki, 2019, vol. 161, no. 2, pp. 348–357. doi: 10.26907/2542-064X.2019.2.348-357.

Abstract

The microsculpture of Permian and Triassic conchostracans from the Babii Kamen section (Western Siberia) was studied in order to determine the significance of microsculpture inthe taxonomy of conchostracan species. Five types of ornamentation have been identified in conchostracans from the Permian-Triassic reference section of Western Siberia (Babii Kamen section): pitted, nodular, reticulated, radial lirae, radial fringes. The results show that several microsculpture types are common for the genus level of conchostracans. Transition from one type of ornamentation to another was noted in three species: ?Megasitum lopokolense Novojilov, 1970, “Cornia papillaria” Lutkevich, 1937, and “Concherisma tomensis” Novojilov, 1958. The observed changes in the shell microsculpture types can be considered as a taxonomic feature for these three species and should form the base for future taxonomical revisions.

Keywords: Conchostraca, microsculpture, Late Permian, Early Triassic

Acknowledgments. We are grateful to E.A. Zhegallo, A.S. Bashkuev, D.S. Kopylov, A.V. Khramov, A.S. Felker, and O.D. Strelnikova from Paleontological Institute of the Russian Academy of Sciences for their invaluable help when sampling the material.

This study was supported by the Russian Science Foundation (project no. 19-17-00178).

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Recieved

April 18, 2019

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