Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
         (Helicid Sigmurethra)
           Superfamily Helixarionoidea Bourguignat, 1883, orth. inval.
             Family Helixarionidae Bourguignat, 1883, orth. inval. see Family Helicarionidae Bourguignat, 1877
               Subfamily Microcystinae Thiele, 1931
                 Genus Philonesia Sykes, 1900
                   01 Subgenus Aa Baker, 1940
                   02 Subgenus Haleakala Baker, 1940
                   03 Subgenus Hiloaa Baker, 1940
                   04 Subgenus Kipua Baker, 1940
                   05 Subgenus Mauka Baker, 1940
                   06 Subgenus Nesarion Baker, 1940
                   07 Subgenus Nukupiena Baker, 1940
                   08 Subgenus Oafatua Baker, 1940
                   09 Subgenus Piena Cooke, 1940
                   10 Subgenus Pitcairnia Baker, 1940
                   11 Subgenus Rapafila Baker, 1940
                   12 Subgenus Uafatua Baker, 1940
                   13 Subgenus Waihoua Baker, 1940