Typhlochactinae Mitchell, 1971

Soleglad, Michael E. & Fet, Victor, 2003, High-level systematics and phylogeny of the extant scorpions (Scorpiones: Orthosterni), Euscorpius 2003 (11), pp. 1-175 : 109

Subfamily Typhlochactinae Mitchell, 1971

Type Genus. Typhlochactas Mitchell, 1971 .

Composition. This subfamily includes three genera ( Alacran , Sotanochactas , and Typhlochactas ).

Distribution. North America ( Mexico).

Taxonomic history. This taxon was originally introduced as a subfamily of Chactidae . It corresponds to the tribe Typhlochactini of Francke (1982a).

Diagnosis. Synapomorphies. Ventral surface of leg tarsus with setal pairs, ventral spinules minimal or obsolete; number of leg pedal spurs varies from zero to two; sternum length equal to or greater than width; sternum apex rounded, with minimal depression, lateral lobes flat; hemispermatophore lamina terminus spatulate in shape; pectinal fulcra absent. Important Symplesiomorphies. Chelal finger median denticle (MD) row groups aligned obliquely; chelal trichobothrium it positioned at extreme base of fixed finger; chelal trichobothria Db basal and Dt situated at base of fixed finger; lateral carinae of metasomal segment V absent.