[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       Pantetrapulmonata Shultz, 2007
         [Order] Araneida Clerck, 1757 - spiders
           [Suborder] Araneae Clerck, 1757 - tailless spiders
             01 [Infraorder] Mesothelae Pocock, 1892 - segmented spiders
             02 [Infraorder] Opisthothelae Pocock, 1892 - unsegmented spiders
             03 Genus †Amphiclotho Gourret, 1887, incertae sedis
             04 Genus †Amphithomisus Gourret, 1887, incertae sedis
             05 ?Genus †Atocatle Feldmann, Vega, Applegate & Bishop, 1998
             06 Genus †Cercidiella Gourret, 1887, incertae sedis
             07 Genus †Clubionella Gourret, 1887, incertae sedis
             08 Genus †Eresoides Gourret, 1887, incertae sedis
             09 Genus †Hersilioides Gourret, 1887, incertae sedis
             10 Genus †Opisthophylax Menge, 1856, incertae sedis
             11 Genus †Palaranea Fritsch, 1873, incertae sedis
             12 Genus †Paralycosa Dunlop & Jekel, 2009, incertae sedis
             13 Genus †Prodysdera Gourret, 1887, incertae sedis
             14 Genus †Protochersis Gourret, 1887, incertae sedis
             15 Genus †Protolachesis Gourret, 1887, incertae sedis
             16 Genus †Pseudothomisus Gourret, 1887, incertae sedis
             17 Genus †Pyritaranea Fritsch, 1899, incertae sedis
             18 Genus †Schellenbergia Heer, 1865, incertae sedis
             19 Genus †Timeropus Dunlop, Penney & Jekel, 2008, orth. inval., incertae sedis see Genus Trimeropus Thorell, 1891