Species: wellsi THAYER, 1985
Etymology: In honor of Samuel P. Welles.

Holotype: UALP 4947

Locality: UALP 7205, Swisshel Mountains, Cochise County, Arizona.

Horizon: Black Prince Limestone, one meter below contact with overlying Pennsylvanian Horquilla limestone, Late Morrowan or earliest Derryan (equivalent to Langsettian – Duckmantia boundary).

Biostratigraphy:

Age: Westephalian, lower upper Silesian, upper Bashkrian or lower Moscovian Epoch, early Pennsylvanian (Late Carboniferous).

Material: A vertebra of the sacral region.

Hypdigm:

UALP 4948-4950, 4957, 5147, 5148, 5151, 5152, 5156-5158, 5163, 5165, 5181, 5203, 5266, 5691, 5693, 5701,

R, 1985
Ety5861-5863, 6211: Disarticulated vertebrae including 14 dorsals, 2 sacrals, and 2 caudals.