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 Pyramidellidae Gray, 1840
Subfamily Pyramidellinae Gray, 1840
Genus Pyramidella Lamarck, 1799
Subgenus Callolonchaeus Vaught, 1989, orth. inval.
see Subgenus Callolongchaeus Dall & Bartsch, 1904