Species: dunkardensis ROMER, 1952
Etymology: In reference to Dunkard Formation, Dunkard Group.

Holotype: USNM 12166

Locality: 5 miles southwest of Cottageville, Jackson County, West Virginia.

Horizon: Dunkard Formation, Dunkard Group.

Biostratigraphy:

Age: Wolfcampanian stage, upper lower to lower middle Rotliegendes Epoch, Early Permian

Material: Vertebrae, incomplete pelvis, femur, tibia, and fragmentary right foot.

Referred material:

FMNH UR 381: Cast of type.

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Species: brahycoles LANGSTON, 1966
Etymology:

Holotype: UCMP 35767

Locality: UCMP Locality V-2814, the Camp Quarry, on the southeast slope of a small butte, 410 yards south of New Mexico State Highway 96, about 940 yards southeast of the Rio Puerco bridge at Arroyo del Agua, section 8, T.22N., R.3E., Rio Arriba County, New Mexico.

Horizon: El Cobre Canyon Formation (Upper Cutler Formation), Cutler Group.

Biostratigraphy:

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

Material: Right femur.

Referred material:

UCMP 40238: Dorsal vertebra.

UCMP 40232: First sacral vertebra.