Finds of Upper Devonian Linguloids of the Genus Paterula Barrande (Family Paterulidae Cooper) in the Volga–Ural and Timan–Pechora Regions

A new species, Paterula (?) vasilievae, from the Frasnian of the Volga–Ural and Timan–Pechora regions is described. The species has weakly convex valves, a protegulum on both valves, and a ventral pseudoarea. The shell microstructure has been studied on both valves at different age stages.