Porphyrocrinidae

Cladus: Eukaryota
Supergroup: Unikonta
Cladus: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Echinodermata
Subphylum: Pelmatozoa
Classis: Crinoidea
Subclassis: Articulata
Ordo: Bourgueticrinida
Familia: Porphyrocrinidae
Genera: Naumachocrinus - Porphyrocrinus

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Source: Wikispecies: All text is available under the terms of the GNU Free Documentation License