PetrolacosaurusYounginaGephyrosaurusSquamataProlacertaMacrocnemusTanystropheusTrilophosaurusHowesiaMesosuchusRhynchosaurusScaphonyxStenaulorhynchusHyperodapedonProterosuchusEuparkeriaChampsosaurusCteniogenysLazarussuchusProtorosaurusMegalancosaurusLangobardisaurusDrepanosaurusTeraterpetonOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Sues_2003a