Species: parkeyi ROMER, 1937
Holotype: MCZ 1161
Locality: 1 mile west of the former Woodrum ranch-house, from Tit Mountain, just northeast of Dundee, Archer County, Texas.
Horizon: Petrolia Formation (formerly Belle Plains Formation, middle Wichita Group), Lower Wichita Group.
Biostratigraphy: Land-vertebrate faunachron upper B.
Age: Upper Wolfcampanian stage, Upper Rotliegendes Epoch, Early Permian.
Material: Skull and mandible.