A NEW ANOMODONT (THERAPSIDA) FROM THE MIDDLE TRIASSIC OF THE SOUTHERN FORE-URALS

Abstract

A new Sinokannemeyeriine species, Rhadiodromus mariae, is described. This species occurs only in the upper horizon of the Donguz Formation, while R. klimovi is confined to beds with sandy lenses at the bottom of the upper third of this formation. The stratigraphic range of anomodonts in the Donguz Formation is divided into the early and late associations observed in the middle and upper parts of the formation. The early association includes the genera Rabidosaurus Kalandadze (represented by R. klimovi), Calleonasus Kalandadze, Uralokannemeyeria Danilov, Nasoplanites Surkov, Cristonasus Surkov, and Parvobestiola Surkov. The late association includes only the genus Rhinodicynodon Kalandadze and the new species R. mariae.