living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryotae see Domain Eukaryota Chatton, 1925
     Animalia Linnaeus, 1758 - animals
       Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Mollusca Linnaeus, 1758 - molluscs
           Gastropoda Cuvier, 1795 - snails and slugs
             Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
               Mesogastropoda Thiele, 1925 - mesogastropods see [unranked] mesogastropods
                 Heteropoda Lamarck, 1812 see Superfamily Pterotracheoidea Rafinesque, 1814
                   Pterotracheidae Rafinesque, 1814
                     Pterotrachea Forskål, 1775