Permian chondrichthyans of the Kanin Peninsula, Russia

Abstract

© 2014, Pleiades Publishing, Ltd. Chondrichthyan fish remains reported from the Permian (Kazanian) deposits of the Chiosha Bay, and the lower course of the Nadtey River of the Kanin Peninsula (Nenets Autonomous District, Arkhangelsk Region, Russia) include dental elements and scales belonging to Stethacanthus cf. S. altonensis (St. John et Worthen, 1875), Symmoriiformes gen. indet., “Ctenacanthus” sp. and “Lissodus” sp., Euselachii gen. indet., Adamantina benedictae Bendix-Almgreen, 1993 and Kanodus robustus sp. nov. The latter genus is assigned to the previously monotypic family Psephodontidae. The record of Stethacanthus in the Middle Permian of Russia is its youngest occurrence worldwide, whilst the occurrence of Adamantina benedictae in the Middle Permian of the Kanin Peninsula is older than the Greenland record.