Family
Pachydiscidae Spath, 1922
Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Ammonoidea |
| Order | Ammonitida |
| Family | Acanthoceratidae |
| Baculitidae | |
| Graphoceratidae | |
| Nostoceratidae | |
| Pachydiscidae | |
| Genus | Lewesiceras |
| Family | Pseudotissotiidae |
| Scaphitidae |
See also