Species: magnus OLSON & BEERBOWER, 1953
Etymology: Latin, magnus, "great, large, important."

Holotype: FMNH (CNHM) UR 143

Locality: Sublocality KN, Little Croton Creek, Knox County, Texas.

Horizon: Member?, 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 occipital-sphenoid-otic complex’s and side wall of skull, axis, 1 complete dorsal vertebra, and 3 vertebral spines, left humerus lacking proximal end, part of distal end of right humerus, part of pubis and base of ilium, rib fragments, tooth fragments and many undetermined bones.

Paratypes:

FMNH UR 144: Several ribs.

FMNH UR 153: Scapulo-coracoid, cervical vertebra, and an anterior rib.

Referred material:

OLSON, 1962

Locality: Loc. KAB, 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:

FMNH (CNHM) UR 485: Partial skeleton lacking anterior vertebrae, humerus, shoulder girdle and skull.

 

Locality: Loc. KAC, about 1/4th mile northwest of Kahn Quarry, Driver Ranch, Knox County, Texas.

Horizon: Upper San Angelo Formation.

Biostratigraphy:

Age: Early Late Permian.

Material:

FMNH (CNHM) UR 586: Ribs, vertebrae and femur.