Chelicerata Heymons, 1901
   †Trigonotarbida Petrunkevitch, 1949
     01 [plesion] Genus †Palaeotarbus Dunlop, 1999
     02 Family †Palaeocharinidae Hirst, 1923
     03 Family †Archaeomartidae Poschmann & Dunlop, 2010 [monotypic]
     04 Family †Anthracomartidae Haase, 1890
     05 Family †Anthracosironidae Pocock, 1903
     06 Family †Trigonotarbidae Petrunkevitch, 1949 [monotypic]
     07 Genus †Aenigmatarbus Poschmann, Dunlop, Bértoux & Galtier, 2016
     08 Genus †Namurotarbus Poschmann & Dunlop, 2010
     09 Genus †Permotarbus Dunlop & Rößler, 2013
     10 Genus †Tynecotarbus Hradská & Dunlop, 2013
     11 Family †Lissomartidae Dunlop, 1995 [monotypic]
     12 Family †Aphantomartidae Petrunkevitch, 1945
     13 Family †Kreischeriidae Haase, 1890
     14 Family †Eophrynidae Karsch, 1882
     15 Genus †Anthracophrynus Andrée, 1913, incertae sedis
     16 Genus †Areomartus Petrunkevitch, 1913, incertae sedis