Species: heteroclitus COPE, 1875
Etymology:
Holotype: UC 6517
Locality: Danville, Vermillion County, Illinois.
Horizon: Lower Conemaugh.
Biostratigraphy:
Age: Stephanian, Upper Silesian, upper Kasimovian to Gzelian Epoch, Latest Pennsylvanian (Latest Carboniferous).
Material: Caudal intercentrum.
Referred material:
LYDEKKER, 1890
Locality: Texas.
Horizon:
Biostratigraphy:
Age: Early Permian.
Material:
BMNH R577: 4 vertebrae.
PATON, 1975
Locality: Oakwood, Vermilion County, Illinois.
Horizon:
Biostratigraphy:
Age: Asselian Stage, Rotliegendes Epoch, Early Early Permian.
Material:
RSM: 1 vertebra.
= Cricotus gibsoni COPE, 1875
Etymology:Holotype: UC 6521, UC 6522
Locality: Danville, Vermillion County, Illinois.
Horizon: Lower Conemaugh.
Biostratigraphy:
Age: Stephanian, Upper Silesian, upper Kasimovian to Gzelian Epoch, Latest Pennsylvanian (Latest Carboniferous).
Material: Posterior caudal intertercentrum.
= Cricotus discophorus COPE, 1875
Etymology:Holotype: UC 6518
Locality: Danville, Vermillion County, Illinois.
Horizon: Lower Conemaugh.
Biostratigraphy:
Age: Stephanian, Upper Silesian, upper Kasimovian to Gzelian Epoch, Latest Pennsylvanian (Latest Carboniferous).
Material: A large trunk intercentrum.