First finding of Cryptonellid brachiopod ? Heterelasma sp. in the Lower Triassic of Southern Primorye, Russia

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Abstract

In the deposits of Neocolumbites insignis Zone (Upper Olenekian substage of the Kamenushka River basin, Southern Primorye, Russia), one specimen of the cryptonellid brachiopod ?Heterelasma sp. was found. The genus Heterelasma Girty, 1909 includes 17 species distributed exclusively in the Permian deposits of the USA, Mexico, China, Nepal, and Pakistan. Comparison with previously described species, along with taking into account the stratigraphic position of the discovered specimen, provides a basis for describing of new finding as belonging to the genus Heterelasma, which may be survived the global Late Permian mass extinction. The study of the internal structure of the described specimen was carried out by using of X-ray microtomograph SkyScan 1272 (Bruker microCT, Belgium) in the Laboratory of X-Ray Methods of the Analytical Center of the Far East Geological Institute of the Far Eastern Branch of Russian Academy of Sciences.

About the authors

A. M. Popov

Far East Geological Institute, Far Eastern Branch, Russian Academy of Sciences

Author for correspondence.
Email: popov_alexander@list.ru
Russian Federation, Vladivostok, 690022

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