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 Architectonicoidea Gray, 1850
           Family Architectonicidae Gray, 1850
             Genus Heliacus d'Orbigny, 1842
               1 Subgenus Heliacus d'Orbigny, 1842
               2 Subgenus Pyrgoheliacus Bieler, 1987
               3 Subgenus Torinista Iredale, 1936
               4 Subgenus Grandeliacus Iredale, 1957
               5 Subgenus Teretropoma Rochebrune, 1881
               6 Subgenus Gyriscus Tiberi, 1867