Species: cromptoni LUCAS & HUNT, 1990
Etymology: In honor of Dr. A. W. Crompton of Harvard University, Cambridge, USA

Holotype: NMMNH P12971

Locality: NMMNH 1430, at the head of the south fork of Home Creek north of Kalgary Locality, UTM 3701500N, 398850E, zone 14, NAD 27, Crosby County, Texas.

Horizon: Colorado City Member, Tecovas Formation, Chinle Group.

Biostratigraphy:

Age: Adamanian, Latest Carnian Stage, Late Triassic Epoch, Late Triassic.

Material: Fragmentary skull and braincase.