FAMILY                      Trigonotarbidaincertae [Fossil]
GENUS                              Xenarachne Dunlop & Poschmann, 1997:235 [Fossil; Dev.]
SPECIES                                 Xenarachne willwerathensis Dunlop & Poschmann, 1997:235 [type; TetrapulmonataFossil]
GENUS                              Palaeotarbus Dunlop, 1999:191 [Fossil]
                                   [=Eotarbus Dunlop, 1996:613] [praeocc. Kusta 1888]
SPECIES                                 Palaeotarbus jerami (Dunlop, 1996:613) [typeFossil]
                                        [=Eotarbus jerami Dunlop, 1996:613]
GENUS                              Alkenia Stírmer, 1970 [Fossil]
SPECIES                                 Alkenia mirabilis Stírmer, 1970 [Fossil]
GENUS                              Archaeomartus Stírmer, 1970 [Fossil]
SPECIES                                 Archaeomartus levis Stírmer, 1970 [Fossil]
SPECIES                                 Archaeomartus tuberculatus Stírmer, 1970 [Fossil]