Family
Pseudorthoceratidae Flower et Caster, 1935
List of species
Luokittelu
| Organism group | Biota |
| Domain | Eukaryota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratoidea |
| Order | Pseudorthocerida |
| Family | Pseudorthoceratidae |
| Genus | Buchanoceras |
| Family | Spyroceratidae |
| Genus | Lyecoceras |