Superfamily Chactoidea Pocock 1893 (scorpion)
Parent taxon: Orthosternina according to J. A. Dunlop et al. 2013
Sister taxa: Buthoidea, Chaeriloidea, Corniops, Scorpionoidea
Subtaxa: Chactidae Euscorpiidae Hemiscorpiidae Palaeoeuscorpiidae Protochactidae
Ecology:
Distribution: