Northern Dvina River
Gorgonopsians were first identified in Russia in the 1890s at the Sokolki locality on the Northern Dvina River in Siberia under the supervision of Russian palaeontologist Vladimir Prokhorovich Amalitskii. In a posthumous publication, it was described as "Inostrancevia alexandri", and it is one of the best known and largest gorgonopsians. Since then, only a few more Russian genera have been described: "Pravoslavlevia", "Viatkogorgon", "Suchogorgon", "Leogorgon", and "Nochnitsa".