Genus
Curtoceras Ulrich, Foerste, Miller et Furnish, 1942
Luokittelu
| Organism group | Biota |
| Domain | Eukaryota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Tarphyceratia |
| Order | Tarphyceratida |
| Family | Trocholitidae |
| Genus | Curtoceras |
| Species | abditus |
| estonicum | |
| kerstovense | |
| meyeri | |
| teres | |
| Genus | Discoceras |
| Rectanguloceras | |
| Sweetoceras | |
| Trocholites | |
| Species | Palaeonautilus |