<==o Eupelycosauria Kemp, 1982 |-- †Varanopseidae Romer & Price, 1940 [Varanopsidae] `--+-- †Ophiacodontidae `--+-- †Edaphosauridae sensu Modesto, 1995 `--o Sphenacodontia (Marsh, 1878) Romer & Price, 1940 [Sphenacodontidae sensu lato] |?- †Bathygnathus borealis |?- †Macrornerion |?- †Milosaurus mecordi DeMar, 1970 |?- †Tetraceratops insignis Matthew, 1908 |--o †Haptodus Currie, 1977 [paraphyletic Haplodontinae] | |?- †H. beylei [jr. synonyms of H. garnettensis?] | |?- †H. grandis [jr. synonyms of H. garnettensis?] | `-- †H. garnettensis Currie, 1977 `--+-- †Palaeohatteria longicaudata (Credner, 1888) [Haplodus] [paraphyletic Haplodontinae] `--+-- †Pantelosaurus saxonicus (von Huene, 1925) [Haplodus] [paraphyletic Haplodontinae] `--+-- †Cutleria wilmarthi (Lewis & Vaughn, 1965) [Haplodus] [paraphyletic Haplodontinae] `--o Sphenacodontoidea |-- †Sphenacodontidae sensu stricto `-- Therapsida (nisäkäsmäiset synapsidit, mammallike synapsids)
Reference(s):
- Berman, D. S., Henrici, A. C., Sumida, S. S. & Martens, T., 2000: Redescription of Seymouria sanjuanensis (Seymouriamorpha) from the Lower Permian of Germany based on complete, mature specimens with a discussion of paleoecology of the Bromacker locality assemblage.
–Journal of Vertebrate Paleontology: Vol. 20, #2, pp. 253-268 - 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 - Conrad, J., 2001: Re-evaluation of Tetraceratops insignis (Synapsida: Sphenacodontia).
–Journal of Vertebrate Paleontology: Vol. 21, #3, Supplement to #3, pp. 42A - Kazlev, M. A., 1998-2000: Sphenacodontidae.
–iNet: The Kheper Site: http://www.kheper.auz.com/gaia/biosphere/vertebrates/pelycosauria/Sphenacodontidae.htm - Langston, W. & Reisz, R. R., 1981: Aerosaurus wellesi, new species, a varanopseid mammal-like reptile (Synapsida: Pelycosauria) from the Lower Permian of New Mexico
–Journal of Vertebrate Paleontology: Vol. 1, #1, pp. 73-96 - Laurin, M., 1993: Anatomy and relationships of Haplodus garnettensis, a Pennsylvanian synapsid from Kansas.
–Journal of Vertebrate Paleontology: Vol. 13, #2, pp. 200-229 - Laurin, M. & Reisz, R. R., 1997-1998: Synapsida – Mammals and their extinct relatives.
–iNet: The Tree of Life: http://tolweb.org/tree/eukaryotes/animals/chordata/synapsida.html - Laurin , M. & Reisz, R. R., 1997: Autapomorphies of the main clades of synapsids.
–iNet: The Tree of Life: http://tolweb.org/tree/eukaryotes/animals/chordata/synapsidlichen/synapsidasynapomorphies.html
Special thanks to:
Jos H. M. Dols, for gathering additional information and species of these animals.