Ceratites semipartitus

Ceratites semipartitus, Photo: Michael Lahanas

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Ordo: Ceratitida
Superfamiliy: Ceratitiaceae
Family: Ceratitidae
Genus: Ceratites
Species: Ceratites semipartitus