Genus
Ptychophyllum Milne-Edwards et Haime, 1851
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Cnidaria |
| Subphylum | Anthozoa |
| Subclass | Rugosa |
| Order | Stauriida |
| Suborder | Cyathophyllina |
| Family | Ptychophyllidae |
| Genus | Cyathactis |
| Ptychophyllum |
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Cnidaria |
| Subphylum | Anthozoa |
| Subclass | Rugosa |
| Order | Stauriida |
| Suborder | Cyathophyllina |
| Family | Ptychophyllidae |
| Genus | Cyathactis |
| Ptychophyllum |