摘要：Lystrosaurus murrayi and L. declivis are two dicynodont (Therapsida, or mammal-like reptile) species commonly represented in Triassic deposits which are referred to as the ‘Lystrosaurus Assemblage Zone’ of the South African Karoo, postdating the Permo-Triassic boundary at 252 million years ago. The holotypes of these two species are curated in the Natural History Museum in London. Unfortunately, both are fragmentary (personal observation). Despite the fragmentary condition of the holotypes, Cluver 1 , Cluver and King 2 and Brink 3 accepted the view that at least two species of Lystrosaurus (L. murrayi and L. declivis) could be distinguished.
