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 Amathininae Ponder, 1987 see Family Amathinidae Ponder, 1987
               Genus Kleinella Adams, 1860
                 Subgenus Actaeopyramis Fischer, 1885