Family
Arionoceratida Dzik, 1984
Klassificering
| Organism group | Biota |
| Domain | Eukaryota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratoidea |
| Order | Orthocerida |
| Suborder | Orthoceratina |
| Family | Arionoceratida |
| Genus | Parakionoceras |
| Family | Arionoceratidae |
| Dawsonoceratidae | |
| Eriditidae | |
| Geisonoceratidae | |
| Lamellorthoceratidae | |
| Orthoceratidae | |
| Proteoceratidae | |
| Tripteroceratidae |