Dimetrodon grandis Case 1907

Osteichthyes - Synapsida - Sphenacodontidae

Alternative combination: Theropleura grandis

Synonym: Dimetrodon maximus Romer 1936

Full reference: E. C. Case. 1907. Revision of the Pelycosauria of North America. Carnegie Institution of Washington 55:3-176

Belongs to Dimetrodon according to R. R. Reisz 1986

See also Case 1907, Hay 1930, Romer 1936 and Romer and Price 1940

Sister taxa: Dimetrodon angelensis, Dimetrodon booneorum, Dimetrodon borealis, Dimetrodon dollovianus, Dimetrodon giganhomogenes, Dimetrodon limbatus, Dimetrodon loomisi, Dimetrodon macrospondylus, Dimetrodon milleri, Dimetrodon natalis, Dimetrodon occidentalis, Dimetrodon teutonis

Type specimens:

  • Dimetrodon grandis: AMNH 4034 (not 4130-4134, as erroneously stated by Case, 1907), a set of postcrania (vertebrae and pelvic elements). Its type locality is Beaver Creek, 42 (Arroyo Formation), which is in a Kungurian terrestrial claystone/sandstone in the Arroyo Formation of Texas.
  • Dimetrodon maximus: MCZ.


• Permian of United States (2: Oklahoma, Texas collections)

Total: 2 collections including 3 occurrences

Show more details

Specimen images are retrieved through the ePANDDA API.

Click image to enlarge. Click to access iDigBio record.