Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs
see Order Opisthobranchia Milne-Edwards, 1848
Order Cephalaspidea Fischer, 1883
Superfamily Acteonoidea d'Orbigny, 1843
Family Haminoeidae Pilsbry, 1895
Subfamily Bullactinae Thiele, 1926 [monotypic]
see Family Bullactidae Thiele, 1926
1 Genus Bullacta Bergh, 1901