FAMILY                      Isobuthidae Petrunkevitch, 1913:32  [Fossil]
GENUS                              Boreoscorpio Kjellesvig-Waering, 1986:154  [Fossil]
SPECIES                                 Boreoscorpio copelandi Kjellesvig-Waering, 1986:154 [Fossil; u.Carb.; Canada]
GENUS                              Bromsgroviscorpio Kjellesvig-Waering, 1986:157  [Fossil]
SPECIES                                 Bromsgroviscorpio willsi Kjellesvig-Waering, 1986:157 [Lower KeuperFossil; Triassic; England]
GENUS                              Feistmantelia Fritsch, 1904:75  [Fossil]
SPECIES                                 Feistmantelia ornata Fritsch, 1904:75 [StephanianFossil; Perm.; CzechRepublic]
GENUS                              Isobuthus Fritsch, 1904:70  [Fossil]
SPECIES                                 Isobuthus kralupensis (Thorell & Lindström, 1885):17 [Westphalian; typeFossil; u.Carb.; CzechRepublic]
                                        [=Cyclophthalmus kralupensis Thorell & Lindström, 1885]
SPECIES                                 Isobuthus nyranensis Fritsch, 1904:75 [fragment of a tibiaFossil; CzechRepublic]