Cyathophyllum planum, Photo: Michael Lahanas
Superregnum: Eukaryota
Supergroup: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Phylum: Cnidaria
Classis: Anthozoa
Subclassis: †Rugosa
Ordo: †Stauriida
Subordines: - Cyathophyllina
Famili: Cyathophyllidae
Genus: Cyathophyllum
Species: Cyathophyllum dianthus
See : List of prehistoric hexacorals
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