After Carroll, 1988
<==o †Trimerorhachoidea |--o †Trimerorhachidae | |?- †Doragnathus woodi Smithson, 1980 | |-- †Lafonius | |-- †Nannospondylus | |-- †Neldasaurus | |-- †Slaughenhopia | `-- †Trimerorhachis `--o †Saurerpetontidae |-- †Saurerpeton |-- †Acroplous vorax Hotton, 1959 |-- †Erpetosaurus `-- †Isodectes
Reference(s):
- Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - Carroll, R. L., 1988: Appendix. 594-648.
in Carroll, R. L. 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698. - Foreman, B. C., 1990: A revision of the cranial morphology of the Lower Permian temnospondyl amphibian Acroplous vorax Hotton.
–Journal of Vertebrate Paleontology: Vol. 10, #3, pp. 390-397