Genus: Coelostegus CARROLL & BAIRD, 1972
Etymology: Greek, koilos, “embayed, hollow, concave” and Greek, stegos, “roof”: Embayed (skull) roof.

Species: prothales CARROLL & BAIRD, 1972
Etymology:

Holotype: CGH 3027

Locality: Nyrany (Nurschan), Plzen Basin, Bohemia, Czech Republic.

Horizon: Gaskohl.

Biostratigraphy:

Age: Upper Westphalian D, Lower Upper Silesian Series, Desmoniensean, Upper Myachkovskian Stage, Upper Moscovian Epoch, Late Carboniferous (Late Pennsylvanian).

Material: Fragmentary skull, axial skeleton and girdles of an immature individual.