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Secodontosaurus obtusidens Cope 1880 (synapsid)

Osteichthyes - Synapsida - Sphenacodontidae

PaleoDB taxon number: 346266

Alternative combinations: Dimetrodon obtusidens, Theropleura obtusidens

Synonyms: Dimetrodon longiramus Case 1907 (no. 123422), Secodontosaurus longiramus Case 1907 (no. 252451), Secodontosaurus willistoni Romer 1936 (no. 122486)

Full reference: E. D. Cope. 1880. Second contribution to the history of the Vertebrata of the Permian formation of Texas. Proceedings of the American Philosophical Society 19:38-58

Belongs to Secodontosaurus according to R. R. Reisz 1986

Sister taxa: none

Type specimens:

  • Secodontosaurus obtusidens: AMNH 4007, a partial skeleton (fragments of skull and postcrania). Its type locality is Mount Barry, 12 (Admiral Formation), which is in an Artinskian terrestrial shale in the Admiral Formation of Texas.
  • Dimetrodon longiramus: AMNH 4091, a partial skeleton (partial mandible, scapula, vertebrae). Its type locality is Tit Mountain, 21 (Belle Plains Formation), which is in an Artinskian terrestrial claystone/limestone in the Belle Plains Formation of Texas.
  • Secodontosaurus willistoni: FMNH (WM) 573, a partial skull (one maxilla and one dentary). Its type locality is Craddock Bonebed, Brush Creek, 38 (Arroyo Formation), which is in a Kungurian terrestrial claystone/sandstone in the Arroyo Formation of Texas.