Article: A new genus of Triassic dicynodont from East Africa and its classification

A new Triassic dicynodont Angonisaurus cruikshanki gen. et sp. nov. from the Manda Formation of Tanzania is described. The specimen is considered to be closely related to Tetragonias from the same Formation and belongs to the same family, the Shansiodontidae. The classification of Triassic dicynodonts is reviewed. Using the characteristics of snout shape and length, proportion of preorbital and postorbital region, and degree of obliquity of occiput, most genera are put into the three families Kannemeyeriidae, Stahleckeriidae, and Shansiodontidae, which were suggested by Cox (1965). The criteria for the classification are also discussed.