Isoperla pseudornata Zhiltzova 1988

Isoperla pseudornata Zhiltzova, 1988 Figs. 81–89 Material examined. Russia, Far East, Primorsky Krai: 1♂, Barabashevka River, above the fish factory, 24.06.2021, coll. T. Tiunova; 3♂, Barabashevka River, the same place, 31.05.2004, coll. V. Teslenko; 2♂ 4♀ 3L, Barabashevka River the same place, 14– 23.05.2002, coll. V. Teslenko; 5♂ 7♀, Ryazanovka River, near the hunting grounds, 10.06.2003, coll. V. Teslenko; 3♂ 2♀, Bolshaya Ussurka River, Zvenigorodka village, Ussuri R. basin, 06.08.2004, coll. V. Teslenko; 2♂ 4♀ 1L, Tigrovaya River, Partizanskaya R. basin, Khmelnitskoye settlement, 11 06.1998, coll. V. Teslenko; 2♂ 4♀, Sergeevka River, Partizanskaya R. basin, highway, under the bridge, 12.06.1998, coll. V. Teslenko. Egg. The egg of I. pseudornata is described here for the first time. Shape oval, sometimes pear-shaped (Figs. 81–82); cross-section pentagonal with 5 distinct longitudinal ridges; posterior and anterior poles are pentagonal, and the anterior pole is slightly concave (Figs. 85–87). Length 242‒329 µm, width 203‒229 µm (n=5). Collar well developed and relatively high, with irregular and raised longitudinal ridges; rim flanged, wavy at the apex; base embedded, shoulder smooth, and surrounded with a row of pits (Figs. 82, 84, 87). Anchor mushroom-shaped, with small globular bodies concentrated into groups mainly in a peripheral area along the margin’s top of the anchor, shallowly embedded and covered with a few single globular bodies (Figs. 81, 83). Hexagonal FCIs well-developed, ridges wide, rose, rough, and thickened floors rough with numerous relatively deep punctations (about 14–19); eclosion line absent (Figs. 82, 88). Micropylar row clearly visible, with micropyles set on follicle cell ridges and grouped in threes near the anterior ⅓ (Fig. 82). Orifices arranged singularly on the top of FCI ridges, larger than the chorionic punctations (Fig. 89) and surrounded by polygonal rosettes; sperm guides short and thickened (Fig. 89). Distribution. East Asian species with limited distribution in the south of the Russian Far East, Jewish Autonomous Region, Khabarovsk Krai, and Primorsky Krai.