Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Basommatophora Keferstein, 1865 see Suborder Basommatophora Keferstein, in Bronn, 1864
         Superfamily Planorbioidea Vaught, 1989, orth. inval. see Superfamily Planorboidea Rafinesque, 1815
           Family Planorbidae Rafinesque, 1815 - planorbids
             Subfamily Planorbinae Rafinesque, 1815
               Tribe Physastreae Zilch, 1959, orth. inval. see Tribe Physastrini Starobogatov, 1958
                 1 Genus Physastra Tapparone-Canefri, 1883
                 2 Genus Miratesta Sarasin & Sarasin, 1897