Family
Phragmoceratidae Miller, 1877
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Multiceratia |
| Order | Discosorida |
| Family | Apocrinoceratidae |
| Cyrtogomphoceratidae | |
| Lowoceratidae | |
| Phragmoceratidae | |
| Genus | Phragmoceras |
| Family | Westonoceratidae |