Biota (Life)
Eukaryote (Eukarya)
Podiata
Unikont (Unikonta)
Opisthokont (Opisthokonta)
Holozoa
Filozoa
Apoikozoa (Choanozoa)
Animal (Animalia)
Metazoa
Epitheliozoa
Eumetazoa
Bilateria
Nephrozoa (Eubilateria)
Protostome (Protostomia)
Spiralia (Spiralians)
Lophotrochozoa
Mollusca (Molluscs)
Gastropoda (Gastropod)
Prosobranchia
Archaeogastropoda
Calliostomatidae
Calliostomatinae
Children (3 direct children, 3 direct and indirect children):
Omphalotukaia nobilis
Omphalotukaia hajimeana
Omphalotukaia midwayensis