FAMILY                      Gigantoscorpionidae Kjellesvig-Waering, 1986:75  [Fossil]
                            [=Petaloscorpionidae Kjellesvig-Waering, 1986:220]
GENUS                              Gigantoscorpio Størmer, 1963:15  [Fossil]
SPECIES                                 Gigantoscorpio willsi Størmer, 1963:15 [lower ViséanFossil; l.Carb.; Scotland]
GENUS                              Petaloscorpio Kjellesvig-Waering, 1986:220  [Fossil]
SPECIES                                 Petaloscorpio bureaui Kjellesvig-Waering, 1986:220 [Fossil; u.Dev.; Canada]