Alloperla, Banks, 1906

Judson, Sarah W. & Nelson, C. Riley, 2012, 3541, Zootaxa 3541, pp. 1-118 : 23-24

Alloperla

DIAGNOSIS: Adults often bright green in life ( Fig. 90) and often lack the dark pigmentation characteristic of many other chloroperlids. All Alloperla species known from Mongolia, except A. deminuta Zapekina-Dulkeit, 1970 , have a medial, dark, abdominal stripe ( Fig. 96) which is thinner in comparison to other Chloroperlidae , particularly Haploperla . One species, A. mediata also has a narrow medial stripe on the pronotum ( Fig. 100). The male epiproct is at least slightly swollen at the base ( Fig. 101). Most species have ventral spines near the apex of the epiproct, with the exception of A. deminuta . Female subgenital plates are typically triangular ( Fig. 98), again with the exception of A. deminuta which has a small, subtriangular protrusion confined to the middle of the plate. Nymphs are concolorous ( Fig. 82) and characterized by many long intrasegmental hairs on the distal cercal segments.

DISTRIBUTION—Global: Nearctic & East Palearctic— Regional: AOB, POB*— Aimag: AR, BU^, KhE*, KhG, OV^, SE^, TO^, UB, ZA.

DISCUSSION: All Mongolian species of this genus are well documented in the eastern Palearctic (Levanidova & Zhiltzova 1976, Teslenko & Bazova 2009), however MAIS collections documented two species previously unrecorded in Mongolia. Alloperla in Mongolia seem to be restricted to the Selenge River Basin ( Fig. 91) and most commonly occur at elevations between 800 and 1500 msl.