Species: knoxensis OLSON, 1951
Etymology: In reference to Knox County, Texas.
Holotype: CNHM UR 14
Locality: Locality KF (OLSON 1948) at three-channel hill, approximately 7 miles north of Vera, Knox County, Texas.
Horizon: Upper part of Vale Formation, Middle Clear Fork Group.
Biostratigraphy: Land-vertebrate faunachron lower to middle D.
Age: Upper Leonardian Stage,Upper Rotliegendes Epoch, Early Permian.
Material: Skull, lower jaws, 6 anterior vertebrae and partial shoulder girdle.