Oncocerida

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: †Oncocerida
Familiae: Acleistoceratidae - Archiacoceratidae - Brevicoceratidae - Diestoceratidae - Graciloceratidae - Hemiphragmoceratidae - Jovellaniidae - Karoceratidae - Nothoceratidae - Oncoceratidae - Polyelasmoceratidae - Poterioceratidae - Tripleuroceratidae - Tripteroceratidae - Valcourocratidae