deBraga, M. Rieppel, O. 1997 Reptile phylogeny and the interrelationships of turtles Zoological Journal of the Linnean Society 120 281-354 Seymouriadae Diadectomorpha Caseidae Ophiacodontidae Edaphosauridae Sphenacodontidae Gorganopsia Cynodontia Captorhinidae Paleothyris Millerettidae Acleistorhinus Lanthanosuchidae Macroleter Bradysaurus Scutosaurus Anthodon Procolophon Owenetta Araeoscelidia Claudiosaurus Younginiformes Kuehneosauridae Testudines Rhynchocephalia Squamata Choristodera Rhynchosauria Prolacertiformes Trilophosaurus Archisauriformes Placodus Eosauropterygia Osteology Maximum Parsimony Based on reanalysis of the original matrix. deBraga_et_Rieppel_1997a