Topic summary
Rhynchosaur
Extracted from the Wikipedia article Rhynchosauria.
Ingroup relationships
The Rhynchosauria includes a single family, named Rhynchosauridae. All rhynchosaurs, apart from the Early and Middle Triassic genera, Eohyosaurus, Mesosuchus, Howesia and Noteosuchus, are included in this family. Hyperodapedontidae, named by Lydekker (1885), was considered its junior synonym. However, Langer et al. (2000) noted that Hyperodapedontidae was erected by Lydekker to include Hyperodapedon gordoni and H. huxleyi, clearly excluding Rhynchosaurus articeps, which was the only other rhynchosaur known at that time. Thus, they defined Hyperodapedontidae as the stem-based taxon that includes all rhynchosaurs more closely related to Hyperodapedon than to Rhynchosaurus.