PaleoDB taxon number: 145255
Full reference: W. D. Matthew. 1908. A four-horned pelycosaurian from the Permian of Texas. Bulletin of the American Museum of Natural History 24:183-185
Sister taxa: none
Type specimen: AMNH 4526, a partial skull (fairly complete skull with one ramus of the lower jaw complete). Its type locality is Coffee Creek, 34 (Arroyo Formation), which is in a Kungurian terrestrial claystone/sandstone in the Arroyo Formation of Texas.