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 see Suborder Araneae Clerck, 1757
                 Suborder Labidognatha see Infraorder Araneomorphae Smith, 1902
                   Superfamily Scytodoidea Blackwall, 1864
                     Family Filistatidae Ausserer, 1867 - cribellate open tube dwellers
                     Family Scytodidae Blackwall, 1864 - spitting spiders
                     Family Loxoscelidae Simon, 1893 - brown spiders see Family Sicariidae Keyserling, 1880
                     Family Sicariidae Keyserling, 1880
                     Family Diguetidae Pickard-Cambridge, 1899
                     Family Plectreuridae Simon, 1893
                     Family Tetrablemmidae Pickard-Cambridge, 1873, orth. praeval.
                     Family Pacullidae Simon, 1894
                     Family Filistadidae see Family Filistatidae Ausserer, 1867