AncestorBranchiosaurusApateonSchoenfelderpetonAlbanerpetontidaeTuditanidaePantylidaeGymnarthridaeHapsidopareiontidaeMicrobrachidaeBrachystelechidaeRhynchonkosGymnophionaCaudataSalientiaPlatyrhinopsAmphibamusTersomiusDoleserpetonMicromelerpetonOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.McGowan_2002a