Chelicerata Heymons, 1901
   †Phalangiotarbida Haase, 1890
     Family †Architarbidae Karsch, 1882
       01 Genus †Architarbus Scudder, 1868
       02 Genus †Bornatarbus Rößler & Schneider, 1997
       03 Genus †Discotarbus Petrunkevitch, 1913
       04 Genus †Geratarbus Scudder, 1890
       05 Genus †Goniotarbus Petrunkevitch, 1949
       06 Genus †Hadrachne Melander, 1903
       07 Genus †Leptotarbus Petrunkevitch, 1945
       08 Genus †Mesotarbus Petrunkevitch, 1949
       09 Genus †Metatarbus Petrunkevitch, 1913
       10 Genus †Ootarbus Petrunkevitch, 1945
       11 Genus †Orthotarbus Petrunkevitch, 1945
       12 Genus †Paratarbus Petrunkevitch, 1945
       13 Genus †Phalangiotarbus Haase, 1890
       14 Genus †Pycnotarbus Daber, 1990
       15 Genus †Triangulotarbus Patrick, 1989