Mesoperlina capnoptera (McLachlan, 1886)

Chloroperla capnoptera: McLachlan, 1886 [1885–1886], Tijdschr. Entomol., 29:157.

Isoperla capnoptera: Claassen, 1940, Mem. Agri. Exp. Sta., Cornell Univ., 232:199.

Isoperla capnoptera: Illies, 1966, Das Tierreich, 82:397.

Mesoperlina monae: Joost, 1970, Entomol. Nach., 14(8):120.

Mesoperlina capnoptera: Zhiltzova, 1970, Entomol. Obozr., 49(3):578.

Mesoperlina capnoptera: Zwick, 1973, Das Tierreich, 94:253.

Mesoperlina capnoptera: Teslenko & Zhiltzova, 2009, Russian Academy of Sciences, Vladivostok: Dalnauka, 48.

Diagnosis: Male tergum 10 divided behind by a longitudinal division ½ the length; medial edge of each half produced into an acute forward and upward hook, with a small rhomboid-like sclerite located between bases. Median sclerite on the posterior margin of male tergum 10 not separated. Aedeagus short, wide at base, apex in profile plumb-like, small number spines scattered over the surface of aedeagus not forming distinct clusters (Figs. 8–10).

Distribution: China (Xinjiang Uygur Autonomous Region), Mongolia, Russia.

Material examined: 3 ♂♂, China, Xinjiang Uygur Autonomous Region, Shawan County, Shuanglonggou scenic spot, ca. 43.88°N, 85.35°E (UTM: 45 N 367446 4859868), 2011-VII-16 .

Remark: A single species of Mesoperlina has been previously recorded from China, M. ochracea Klapálek, 1921 also from the northwestern Xinjiang Uygur Autonomous Region and Afghanistan, Iran, and Russia (Wu 1938, Du 1999, DeWalt et al. 2020). The male of M. ochracea compared to M. capnoptera, has a larger area of sensilla on male tergum 9, and the median rhomboid sclerite of tergum 10 is smaller than that of M. ochracea, without a complete surrounding membranous area.