Uintacrinus socialis , Photo: Michael Lahanas
Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Echinodermata
Subphylum: Crinozoa
Classis: Crinoidea
Ordo: Uintacrinida
Familia: Uintacrinidae
Genus: Uintacrinus
Species: Uintacrinus socialis
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