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 Alaskaperla DIAGNOSIS: This monotypic genus is distinguished by a continuous dark strip that extends from the pronotum through the tip of the abdomen ( Fig. 110 ). Unlike Haploperla , adults do not also have dark markings on the head. The male epiproct is smooth, cylindrical, tab that is directed anteriorly ( Fig. 111 ). The female subgenital plate completly covers sternum 9 ( Fig. 112 ), is parallel sided, and truncate apically. The head of nymphs has a characteristic U-shaped dark pigmentation that bisects ocellar region ( Fig. 113 ). DISTRIBUTION—Global: Nearctic & East Palearctic— Regional: AOB— Aimag: AR^, KhG, OV^, SE^, TO^, UB*, ZA^.