The palaeobiogeography of Permian anomodonts

It is generally considered that the oldest anomodont mammal-like reptiles are known from Late Permian sediments of the USSR and that during the rest of the Late Permian distribution of these fossils widens to encompass nearly all geographical areas by the end of the Period.
This study reviews the occurrence of anomodont genera in Permian sediments and reassesses the conventionally accepted distribution pattern. A broad correlation of terrestrial Permian rocks from different continents is attempted. Using recent reconstructions of Permian continental positions the effect of latitude on anomodont distribution is investigated. Some explanations for the restrictions operating on anomodont distribution are suggested.