Type species: Coscinium cyclops Keyserling, 1846
This genus includes the species:
| Keyserling, 1846 | Permian | Russia, Spitsbergen | WoRMS 1401002 | |
| Nikiforova, 1939 | Permian Cisuralian Sakmarian | Russia | WoRMS 1414766 | |
| (Meek, 1873) | Carboniferous | USA Montana | WoRMS 1410589 | |
| Geinitz, 1848 | Permian Guadalupian | Germany | WoRMS 1401003 | |
| Mather, 1915 | Carboniferous Pennsylvanian Bashkirian | USA Arkansas, Oklahoma | WoRMS 1401004 | |
| Mather, 1915 | Carboniferous Pennsylvanian Bashkirian | USA Arkansas, Oklahoma | WoRMS 1401005 | |
| Ernst & Minwegen, 2006 | Carboniferous Pennsylvanian Moscovian | Spain | WoRMS 1401006 | |
| Nekhoroshev, 1948 | Carboniferous | Russia | WoRMS 1401007 | |
| Ulrich, 1890 | Carboniferous Mississippian Tournaisian-Visean | USA Illinois, Iowa, Missouri | WoRMS 1401008 | |
| Branson, 1922 | Middle Devonian Givetian | USA Missouri | WoRMS 1401009 | |
| Keyserling, 1846 | Permian Cisuralian | Russia | WoRMS 1401010 | |
| Hall & Simpson, 1887 | Middle Devonian Givetian | USA New York | WoRMS 1401011 | |
| (Hall, 1883) | Early Devonian Emsian | USA New York | WoRMS 1410590 |