Species: sanangeloensis OLSON & BEERBOWER, 1953
Etymology: In reference to the San Angelo Formation.
Holotype: FMNH (CMNH) UR 151
Locality: From red shale facies of middle third of section, sublocality KP, Little Croton Creek, Knox County, Texas.
Horizon: San Angelo Formation.
Age: Early Late Permian.
Material: Right hind limb and part of foot, part of left femur, humerus, fragments of vertebrae including 2 centra and scrap.
FMNH (CMNH) UR 152: Right and left femora, top of ilium, part of symphysial region of pubis, vertebral centrum, and scrap.