Species: heteroclitus COPE, 1875
Etymology:

Holotype: UC 6517

Locality: Horseshoe Bend, a cutbank on the Salt Fork of the Vermilion River, west of Danville, Vermilion County, Illinois.

Horizon: Macoupin Limestone Member, Patoka Formation.

Biostratigraphy:

Age: Early Missourian Stage, early Kasimovian Epoch, Late Pennsylvanian Subperiod, Late Carboniferous Period-Asselian Stage, early Rotliegendes Epoch, Early Permian.

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: Horseshoe Bend, a cutbank on the Salt Fork of the Vermilion River, west of Danville, Vermilion County, Illinois.

Horizon: Macoupin Limestone Member, Patoka Formation.

Biostratigraphy:

Age: Early Missourian Stage, early Kasimovian Epoch, Late Pennsylvanian Subperiod, Late Carboniferous Period-Asselian Stage, early Rotliegendes Epoch, Early Permian.

Material: Posterior caudal intertercentrum.

 

= Cricotus discophorus COPE, 1875
Etymology:

Holotype: UC 6518

Locality: Horseshoe Bend, a cutbank on the Salt Fork of the Vermilion River, west of Danville, Vermilion County, Illinois.

Horizon: Macoupin Limestone Member, Patoka Formation.

Biostratigraphy:

Age: Early Missourian Stage, early Kasimovian Epoch, Late Pennsylvanian Subperiod, Late Carboniferous Period-Asselian Stage, early Rotliegendes Epoch, Early Permian.

Material: A large trunk intercentrum.