Phylum Mollusca Linnaeus, 1758 - molluscs
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass Heterobranchia Burmeister, 1837 [monotypic]
see Superorder Heterobranchia Burmeister, 1837
Order Heterostropha Fischer, 1885
Superfamily Pyramidelloidea Gray, 1840
Family Tjaernoeidae Warén, 1991, orth. inval. [monotypic]
see Family Tjaernoeiidae Warén, 1991
1 Genus Tjaernoeia Warén & Bouchet, 1988