PetrolacosaurusYounginaGephyrosaurusSquamataProlacertaMacrocnemusTanystropheusTrilophosaurusHowesiaMesosuchusRhynchosaurusScaphonyxStenaulorhynchusHyperodapedonProterosuchusEuparkeriaChampsosaurusCteniogenysLazurussuchusProtorosaurusMegalancosaurusLangobardisaurusDrepanosaurusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Dilkes_1998a