Haploperla lepnevae Zhiltzova and Zwick, 1971

Judson, Sarah W. & Nelson, C. Riley, 2012, 3541, Zootaxa 3541, pp. 1-118 : 27

Haploperla lepnevae Zhiltzova and Zwick, 1971

SYNONYMY

Haploperla lepnevae Zhiltzova and Zwick 1971

TYPE LOCALITY: USSR: Amur Basin, River Khor .

DIAGNOSIS: Body coloration is very pale to white when preserved in alcohol ( Fig. 115), but bright yellow in life ( Fig. 108). In contrast to this light body color, a wide, nearly continuous, dorsal, black stripe runs from the head through the 9th abdominal tergum ( Fig. 115). The male epiproct is a simple, dark triangular tab with an anteriorly directed point ( Fig. 116). Similar to Alaskaperla longidentata ( Fig. 111), the epiproct is darkly colored even from the base, however, the epiproct of H. lepnevae is unmistakably shorter and more triangular than Ala. longidentata . The female subgenital plate is round, but small, barely protruding, and only noticeable by its faint outlines ( Fig. 117). The coloration of the nymph ( Fig. 118) resembles that of the adult, with a dark central mark and pronotal stripe which continues on the abdomen.

DISTRIBUTION—Global: East Palearctic— Regional: AOB, IDB, POB*— Aimag: AR*, BO, BU, DO*, KhE*, KhG^,SE^, TO, UB.

DISCUSSION: In Mongolia, H. lepnevae is most commonly found in mid-elevation, mid-size streams and is predicted to occur in similar elevations in the eastern mountains ( Fig. 119). It should be noted that preserved specimens of H. lepnevae are strikingly similar in coloration to Isoperla lunigera (Klapálek, 1923) ( Fig. 331) with which its actual and predicted range overlaps. Although the species are readily distinguishable in life, faded preserved specimens should be scrutinized because despite their similar dark markings on their heads, they can be readily distinguished by differences in pronotal and abdominal coloration, as well as obvious epiproct characteristics.