Genus: Broiliellus WILLISTON, 1914
Etymology:

Species: texensis WILLISTON, 1914
Etymology:

Holotype: FMNH (CNHM) UC684

Locality: Mitchell Creek, Archer County, Texas.

Horizon: Clyde Formation, Clear Fork Group.

Biostratigraphy:

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

Material: Skull, dorsal armor and miscellaneous limb bones.

Referred material:

FMNH (CNHM) UC 685: Skull, dorsal armor and miscellaneous limb bones.

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Species: brevis CARROLL, 1964
Etymology:

Holotype: MCZ 1424

Locality: Archer City bone bed, 1 mile southwest of Archer City, Archer County, Texas.

Horizon: Archer City Formation (formerly Putnam Formation), Wichita Group.

Biostratigraphy:

Age: Leonardian series, Upper Rotilegendes Epoch, Early Permian.

Material: Skull and lower jaw with 12 vertebrae, 9 armor plates, 9 ribs, left and right cleithra and scapulae, fragments of the clavicles and left humerus.
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Species: arroyoensis DEMAR, 1967
Etymology:

Holotype: FMNH UR431

Locality: East Coffee Creek, Baylor County, Texas.

Horizon: Arroyo Formation, Clear Fork Group.

Biostratigraphy:

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

Material: Anterior two-thirds of a skull, including the entire skull roof to a point just posterior to the orbits, and the complete upper and lower jaws to the articulation on the right side.

Referred material:

FMNH UR810: A nearly complete armor carapace.

FMNH UR812: Part of the shoulder girdle and carapace.