Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
       Order Acochlidioidea Küthe, 1935 [monotypic] see Order Acochlidia Odhner, 1937
         Superfamily Euacochlidioidea nom. inval.
           01 Family Acochlidiidae Küthe, 1935 [monotypic]
           02 Family Hedylopsidae Odhner, 1952
           03 Family Microhedylidae Odhner, 1937 see Family Parhedylidae Thiele, 1931
           04 Family Tantulidae Rankin, 1979 [monotypic]
           05 Family Asperspinidae Rankin, 1979 [monotypic]
           06 Family Minicheviellidae Starobogatov, 1983 see Family Asperspinidae Rankin, 1979
           07 Genus Antemnella Rankin, 1979
           08 Genus Gastrohedyle Rankin, 1979 see Genus Pontohedyle Golikov & Starobogatov, 1972
           09 Genus Maraunibina Rankin, 1979 see Genus Pontohedyle Golikov & Starobogatov, 1972
           10 Genus Palliohedyle Rankin, 1979