Neochactina Soleglad & Fet, 2003

Soleglad, Michael E. & Fet, Victor, 2003, High-level systematics and phylogeny of the extant scorpions (Scorpiones: Orthosterni), Euscorpius 2003 (11), pp. 1-175 : 101-102

Subtribe Neochactina Soleglad & Fet , new subtribe

Type Genus. Neochactas Soleglad & Fet , new genus.

Composition. This new monotypic subtribe is described here.

Distribution. South America.

Diagnosis. Synapomorphies. Chelal trichobothrium Db situated proximally on palm base, trichobothrium Dt distal of midpoint but proximal of trichobothrium Est. Important Symplesiomorphies. Neobothriotaxy Ch2 present on ventral surface of patella; neobothriotaxy Ch2 present on external surface of patella; pectinal middle lamellae composed of a one or two plates, semi-fused with anterior lamellae, fulcra if present, quite reduced; chelal trichobothrial est–esb–eb configuration angles away from fixed finger edge, eb close to finger edge.

Discussion. This subtribe is the most primitive component in tribe Brotheini , where the juncture of trichobothria est–esb–eb angles away from the fixed finger edge, a condition commonly found in many of the chactoids. This orientation of est–esb–eb, plus the more basal positioning of the Db–Dt and Et 3 –Et 5 trichobothrial series, separate Neochactina from its sister subtribe Brotheina .