Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Cephalopoda
Subclassis: Nautiloidea
Ordo: Nautilida
SubOrdo: Nautilina
Superfamilia: Nautilitaceae
Familia: †Eutrephoceratidae
Genus: Eutrephoceras
Name
Nautilitaceae Hyatt, 1894
References
Palmer, Katherine V. W. (1961); "A New Nautiloid, Eutrephoceras eyedrami, New Species from the Cowlitz Formation, Upper Eocene, of Washington" Journal of Paleontology 35(3):532-534
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