ARCHOSAURIFORM POSTCRANIAL REMAINS FROM THE EARLY TRIASSIC KARST DEPOSITS OF SOUTHERN POLAND

Borsuk−Bialynicka, M. and Sennikov, A.G. 2009. Archosauriform postcranial remains from the Early Triassic karst deposits of southern Poland. Palaeontologica Polonica 65, 283–328. Postcranial bones of archosauriform reptiles from the Early Triassic karst deposits of south− ern Poland (Czatkowice 1 locality, Krakow Upland) have been assigned to two genera and species Osmolskina czatkowicensis Borsuk−Bialynicka et Evans, 2003 and Collilongus rarus gen. et sp. n. Osmolskina dominates the Czatkowice 1 fauna. Its postcranium is shown to be close to that of the Anisian South African Euparkeria capensis, the postcranial characters making an even stronger case than those of the skull. This similarity confirms the unity of the tetrapod fauna across Early Triassic Pangea.The exact relationships of Collilongus, based only on cervical vertebrae, remains unknown. The list of archosauriform synapomorphies, encompassing only skull characters according to current knowledge, is supplemented by one postcranial character: the sacral rib facet at least partly overlapping the medial wall of the acetabulum.