living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Chelicerata Heymons, 1901
             Class Arachnida Lamarck, 1801
               Order Araneae Clerck, 1757 - spiders
                 Suborder Labidognatha see Infraorder Araneomorphae Smith, 1902
                   Superfamily Araneoidea Clerck, 1757
                     Family Nesticidae Simon, 1894
                       1 Genus Nesticus Thorell, 1869
                       2 Genus Ivesia Petrunkevitch, 1925 see Genus Nesticus Thorell, 1869
                       3 Genus Schenbeliella
                       4 Genus Typhlonesticus Kulczyn'ski, 1914
                       5 Genus Gaucelmus Keyserling, 1884