Species: aspidephorus WILLISTON, 1910
Etymology:

Holotype: FMNH (CNHM) UC 647

Locality: Willbarger County, Texas.

Horizon: Vale Formation, Clear Fork Group.

Biostratigraphy:

Age: Lower Leonardian, Hessian, Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.

Material: Consisting of a nearly complete articulated skull and skeleton.

Referred material:

FMNH (CNHM) UR806: Articulated fragments of the carapace.

FMNH (CNHM) UC885: Several articulated vertebrae and armor segments.

FMNH (CNHM) UC900: Several articulated neural spines and armor segments.

FMNH (CNHM) UC977: Several articulated neural spines and armor segments.