Chelicerata Heymons, 1901
   †Trigonotarbida Petrunkevitch, 1949
     Family †Kreischeriidae Haase, 1890
       1 Genus †Anzinia Petrunkevitch, 1953
       2 Genus †Gondwanarache Dunlop, Penney & Jekel, 2010, orth. inval. see Genus Gondwanarachne Pinto & Hünicken, 1980
       3 Genus †Hemikreischeria Fritsch, 1904
       4 Genus †Kreischeria Geinitz, 1882
       5 Genus †Pseudokreischeria Petrunkevitch, 1953