Runcinella

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropodae
Subclassis: Orthogastropoda
Superordo: Heterobranchia
Informal Group: Opisthobranchia
Subordo: Cephalaspidea
Superfamilia: Runcinoidea
Familia: Runcinidae
Genus: Runcinella
Species: R. thompsoni - R. zelandica