Revision of the Late Permian Chroniosuchians (Amphibia, Anthracosauromorpha) from Eastern Europe

Abstract

The family Chroniosuchidae is revised. The systematic importance of various morphological fea- tures is evaluated. The family systematic structure is presented and the generic and specific diagnoses are refor- mulated. A new genus Jarilinus and a new species Chroniosaurus levis are established. Evolutionary peculiar- ities of chroniosuchids are discussed. A zonal biostratigraphic chart of the Upper Tatarian deposits of eastern Europe based on tetrapod data is suggested.