New Species of the Genus Ochmazochiton (Mollusca, Polyplacophora) from the Lower Permian Reef Limestones of Shakhtau (Southern Cis-Urals)

Eleven imprints of chiton valves from the Sakmarian of the Shakhtau reef massif (Bashkir Cis-Urals) are assigned to a new species Ochmazochiton uralensis sp. nov. Previously, the genus Ochmazochiton was known only from the type species described from the Lower and Middle Permian of Texas. Due to the unique preservation of the studied material, the structure of the aesthete pores is shown for the first time, and the structure of the insertion plates, the important morphological characters of the genus Ochmazochiton, the earliest representative of the order Chitonida, is clarified.