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 Eucapnopsis DIAGNOSIS: This genus is characterized by particularly short cerci with fewer than 11 segments in adults and less than 15 in nymphs ( Fig. 28 ). The male epiproct is short and stout ( Fig. 44 ), especially in comparison to other Mongolian capniids and Capnia in particular whose epiproct is of comparable width but is much longer. Male sternum 9 has a vesicle ( Fig. 45 ) with a structure similar to the ventral vesicles in Isocapnia . The female subgenital plate is membranous with two lateral sclerites that extend medially ( Fig. 46 ). The lacinia of the nymph has 30 or more even—length teeth ( Fig. 27 ), whereas other capniids have fewer teeth that vary in size along the length of the ventral comb ( Fig. 29 ). DISTRIBUTION—Global: Amphi-Pacific— Regional: AOB*, IDB*— Aimag: KhD*, SE*. DISCUSSION: We did not document Eucapnopsis during our surveys, but the species Eucapnopsis brevicauda is known from the Eroo River (Surenkhorloo 2009).