Genus: Knoxosaurus OLSON, 1962
Etymology: In reference to Knox County, Texas, where the specimen was found.

Species: niteckii OLSON, 1962
Etymology:

Holotype: FMNH (CMNH) UR 824

Locality: Locality KAC, Kahn Quarry, Driver Ranch, Knox County, Texas.

Horizon: Flowerpot Member, Upper San Angelo Formation, Lower Pease River Group.

Biostratigraphy: Land-vertebrate faunachron lower E.

Age: Lower Guadalupian Stage, Upper Rotliegendes Epoch, Early Permian.

Material: Part of maxilla with 2 canine and 2 postcaninae teeth.

Paratype:

FMNH (CMNH) UR 825: Part of lower jaw including roots of the canine and 3 incisors.