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 rostellata (Klapalek, 1923) SYNONYMY Isopteryx rostellata Klapálek, 1923 Chloroperla rostellata Illies, 1966 Alloperla rostellata Zwick, Levanidova, & Zhiltzova, 1971 TYPE LOCALITY: USSR: Irutsk. DIAGNOSIS: The pronotum of this species is covered with darker reticulations ( Fig. 104 ) that are sometimes faded. In some specimens, similar dark reticulations are also evident on the head, particularly in the anterior and occipital regions. The abdomen has a dark medial stripe ( Fig. 104 ) which is somewhat wider than in other Alloperla . The base of the male epiproct is swollen and then constricted before greatly expanding ( Fig. 105 ). Although the epiproct is superficially similar to that of A. mediata in terms of its overall shape and the presence of lateral and ventral spines, the anterior portion of the epiproct in A. rostellata is more broadly rounded and almost triangular in its outline ( Fig. 105 ). From the lateral view, the epiproct is depressed dorsally and therefore thinner neat the tip, whereas in A. mediata is uniform in width. The female subgenital plate ( Fig. 106 ) is parallel sided and rectangular at the base, then abrubtly narrows at a 90 degree angle and forms a triangle that extends about 1/3 the length sternum 9. The overall shape of the plate is similar to A. mediata , ( Fig. 102 ), but that of A. mediata extends much further over sternum 9. The nymphs of this species, like all other Mongolian Alloperla , are unknown at the species level due to lack of comparative material. DISTRIBUTION—Global: East Palearctic— Regional: AOB^— Aimag: AR^, BU^, KhG^, ZA^. DISCUSSION: This species is a new record for Mongolia . Modeling predicts additional occurrences of this species in other moderate to high elevation regions. Like other Mongolian Alloperla , it is found primarily in the area near Lake Hovsgol and throughout the Selenge River Basin ( Fig. 107 ) .