life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Arthropoda Siebold, 1848 - arthropods
     Class Arachnida Lamarck, 1801
       Micrura Hansen & Sørensen, 1904
         Megoperculata Börner, 1902
           Tetrapulmonata Shultz, 1990
             Order Araneae Clerck, 1757 - spiders see Suborder Araneae Clerck, 1757
               Suborder Opisthothelae Pocock, 1892 - modern spiders see Infraorder Opisthothelae Pocock, 1892
                 Araneomorphae Smith, 1902 see [unranked] Araneomorphae Smith, 1902
                   Neocribellatae Caporiacco
                     Araneoclada
                       Entelegynae Simon, 1893
                         Palpimanoidea Thorell, 1869
                           1.1 Family Mimetidae Simon, 1881
                           1.2 ?Family Malkaridae Davies, 1980
                           2.1.1 Family Huttoniidae Simon, 1893
                           2.1.2.1 Family Palpimanidae Thorell, 1869, nom. praeval.
                           2.1.2.2 Family Stenochilidae Thorell, 1873
                           2.2.1 Family Micropholcommatidae Hickman, 1944 see Family Anapidae Simon, 1895
                           2.2.2.1 Family Holarchaeidae Forster & Platnick, 1984 see Family Anapidae Simon, 1895
                           2.2.2.2.1 Family Pararchaeidae Forster & Platnick, 1984 see Family Malkaridae Davies, 1980
                           2.2.2.2.2.1 Family Archaeidae Koch & Berendt, 1854 - assassin spiders
                           2.2.2.2.2.2 Family Mecysmaucheniidae Simon, 1895