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Secodontosaurus willistoni Romer 1936 (synapsid)

Osteichthyes - Synapsida - Sphenacodontidae

PaleoDB taxon number: 122486

Full reference: A. S. Romer. 1936. Studies on American Permo-Carboniferous reptiles. Problems of Paleontology 1:85-93

Belongs to Secodontosaurus according to A. S. Romer 1936

Sister taxon: Secodontosaurus obtusidens

Type specimen: 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.