Mollusca Linnaeus, 1758 - molluscs
see Phylum Mollusca Linnaeus, 1758
Gastropoda Cuvier, 1795
see Class Gastropoda Cuvier, 1795
Clade Heterobranchia Burmeister, 1837
see Superorder Heterobranchia Burmeister, 1837
Informal Group Opisthobranchia Milne-Edwards, 1846
see Order Opisthobranchia Milne-Edwards, 1848
Clade Umbraculida Schmekel, 1985
see Order Umbraculida Schmekel, 1985
Superfamily Umbraculoidea Dall, 1889 (1827)
Family Tylodinidae Gray, 1847