Species: aspidephorus WILLISTON, 1910
Holotype: FMNH (CNHM) UC 647
Locality: Willbarger County, Texas.
Horizon: Vale Formation, Clear Fork Group.
Age: Lower Leonardian, Hessian, Artinskian Stage, Lower Rotliegendes Epoch, Early Permian.
Material: Consisting of a nearly complete articulated skull and skeleton.
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.