Species: texana PRICE, 1937
Etymology: In reference to Texas, the state where the specimen was found.

Holotype: MCZ 1480

Locality: Archer City Bone Bed, Archer County, Texas.

Horizon: Upper Archer City Formation (formerly Putnam Formation, Wichita Group), upper Bowie Group.

Biostratigraphy: Land-vertebrate faunachron upper A.

Age: Wolfcampanian stage, Lower Rotliegendes Epoch, Early Permian.

Material: Skull lacking braincase, lower jaws and postparietals.

Referred material:

CLARK & CARROLL, 1973

Locality: Zott Pasture, southwest corner, section 55, block 3, Clark and Plumb Survey, 3 miles north of Windthorst, Archer County, Texas.

Horizon: Upper Archer City Formation (formerly Putnam Formation, Wichita Group), upper Bowie Group.

Biostratigraphy: Land-vertebrate faunachron upper A.

Age: Wolfcampanian stage, Lower Rotliegendes Epoch, Early Permian.

Material:

UT 40001-4: Skull and skeleton of a juvenile.

UT 40001-3:

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Species: primus CLARK & CARROLL, 1973
Etymology: Latin, primus, "primer, first."

Holotype: MCZ 1963

Locality: Cottonwood Creek, Archer County, Texas.

Horizon: Lower Archer City Formation (formerly Moran Formation, Lower Wichita Group), middle Bowie Group.

Biostratigraphy: Land-vertebrate faunachron middle A.

Age: Lower Wolfcampanian stage, Lower Rotilegendes Epoch, Early Permian.

Material: Skull and associated postcranial material.