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
             Pulmonata Cuvier, 1814 - land snails and slugs see Order Pulmonata Cuvier, 1814
               Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
                 Sigmurethra Pilsbry, 1900 see Group Sigmurethra Pilsbry, 1900
                   Aulacopoda
                     Arionacea
                       Arionidae Gray, 1840
                         Arioninae Gray, 1840 see Family Arionidae Gray, 1840
                           Arion Férussac, 1819