Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
   Opisthokonta Cavalier-Smith, 1987 - opisthokonts see Clade Opisthokonta Cavalier-Smith 1987, nom. cl. inval.
     Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
       Eumetazoa Bütschli, 1910 - eumetazoans
         Triploblastica see [unranked] Bilateria Hatschek, 1888
           Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
             Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
               Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans
                 Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
                   Trochozoa Beklemischev, 1944 - trochozoans
                     Phylum Mollusca Linnaeus, 1758 - molluscs
                       Eumollusca
                         Conchifera Gegenbaur, 1878 see Subphylum Conchifera Gegenbauer, 1878
                           Ganglioneura Rudophi, 1812
                             Rhacopoda see [unranked] Conchifera Gegenbaur, 1878
                               Class Gastropoda Cuvier, 1795 - snails and slugs
                                 pulmonates see Order Pulmonata Cuvier, 1814
                                   Suborder Basommatophora Keferstein, in Bronn, 1864 - lower pulmonates see [unranked] Panpulmonata Jörger, Stöger, Kano, Fukuda, Knebelsberger & Schrödl, 2010
                                     Family Physidae Fitzinger, 1833
                                       1 Genus Physa Draparnaud, 1801