[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Mollusca Linnaeus, 1758 - molluscs
         Branch Eucephala
           Grade Echinoglossa
             Class Gastropoda Cuvier, 1795 - snails and slugs
               Grade Cochlides
                 1 Order Autocochlides
                 2 Order Natantia Lankester, 1877
                 3 Order Cryptocochlides
                 4 Order Pulmonata Cuvier, 1814