The first gliding reptiles from the upper Permian of Russia

Two new gliding reptiles from the Late Permian Kul’chumovo-A locality (Orenburg Region), Rautiania alexandri gen. et sp. nov. and R. minichi sp. nov., are described and assigned to the family Weigeltisauridae. These finds substantially expand the knowledge of the morphology of this group and suggest the climax state of terrestrial tetrapod communities of eastern Europe in the pre-Triassic Time, which resulted in the development of ecological niches not typical of earlier terrestrial vertebrate faunas.