Locality: Halsell Hill Locality, Section 19, Halsell subdivision, Clay County, Texas.
Horizon: Nocona Formation (formerly lower to lower upper Admiral Formation, middle Wichita Group), Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron lower B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material: Skull and fragments of both lower jaws, about 14 vertebrae with
ribs and armour, portions of the shoulder girdle and front limbs.