3541 Author Judson, Sarah W. Author Nelson, C. Riley text Zootaxa 2012 2012-11-06 3541 1 118 journal article 1175­5334 505937B0-9F57-4068-82E6-8553826DD5AA 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.