LITERATURE CITED
- Credner , H. 1888 . Die Stegocephalen und Saurier aus dem Rothliegenden des Plauen'schen Grundes bei Dresden. Siebenter Theil. Palaeohatteria longicaudata . Zeitschrift der deutschen geologischen Gesellschaft , 40 : 490 – 558 .
- Currie , P. J. 1977 . A new haptodontine sphenaocodont (Reptilia: Pelycosauria) from the Upper Pennsylvanian of North America . Journal of Paleontology , 51 : 927 – 942 .
- Currie , P. J. 1979 . The osteology of haptodontine sphenacodonts (Reptilia: Pelycosauria). Palaeontographica . A , 163 : 130 – 168 .
- Huene , F. von. 1925 . Ein neuer Pelycosaurier aus der unteren Permformation Sachsens . Geologische und Palaeontologische Abhandlungen , 18 : 215 – 264 .
- Laurin , M. 1993 . The anatomy and relationships of Haptodus garnettensis, a Pennsylvanian synapsid from Kansas . Journal of Vertebrate Paleontology , 13 : 200 – 229 .
- Lewis , G. E. and Vaughn , P. P. 1965 . Early Permian Vertebrates from the Cutler Formation of the Placerville Area Colorado , United States Geological Survey Professional Papers 503-C: 1 – 50 .
- Reisz , R. R. , Berman , D. S. and Scott , D. 1992 . The cranial anatomy and relationships of Secodontosaurus, an unusual mammal-like reptile (Pelycosauria: Sphenacodontidae) from the early Permian of Texas . Zoological Journal of the Linnean Society , 104 : 127 – 184 .
- Romer , A. S. and Price , L. J. 1940 . Review of the Pelycosauria . Geological Society of America Special Papers , 28 : 1 – 538 .