The relationships of the Tritylodontidae (Synapsida)



From a detailed anatomical survey of the Tritylodontidae, it is possible to examine the phylogenetic status of this taxon of advanced synapsids. The Tritylodontidae are considered to be the sister-group of the Traversodontidae, specifically the Exaerelodon-Massetognathus assemblage, rather than that of the Mammalia plus Tritheledontidae as recently postulated. Numerous character contradictions reveal considerable parallel evolution among advanced synapsids.