Illiesonemoura qianae Du, Zhao, & Rehman sp. nov.

Type material: Holotype, 1♁, China, Yunnan Province, Deqin County, Baima Snow Mountain, 3471 m, N 35.2166 E 113.8300, 2009-VI-19, leg. Qian Yu-Han (ICYZU).

Adult habitus: Head dark brown, antennae brown, pronotum brown, rectangular (Fig. 1A). Cervical gills are membranous and well developed (Fig. 1B). Wings subhyaline, with slight brown stripes, veins brown. Legs are primarily brown, with brown lines on the dorsal surface of the femora.

Male: Forewing length 6.1 mm, hind wing length 5.2 mm. Terga 1–9 sclerotized in anterior margin. Tergum 9 concaved at median of anterior margin. Tergum 10 mostly sclerotized, medially slightly sclerotized with a shallow median concavity bearing scattered thick brown spines, mediolaterally with large paired projection bearing small spines on the apical area of projections and elevated in the lateral view. (Figs. 2A, 2C, 3A, 3C). Hypoproct broad basally, tapering to the pointed apex; vesicle short, length 2 × width. Paraprocts divided into 2 lobes; inner lobe sclerotized and slender; outer lobe sclerotized, sub-triangular, broad from base and tapered toward apex, tip curved upward, forming pointed two teeth (Figs. 2B–2C, 3B–3C). Epiproct short and wide, ventral sclerite membranous (Figs. 2A, 4A), bearing a horizontal stripe medially, possess a row of small spines on the lateral sides of horizontal stripe and forming a pair of linearly sclerotized stripe at the apical margins, apically with a pair of sub-oval sclerotized stripe (Figs. 2D, 4A). Epiproct dorsal sclerite with a pair of out curved lateral arms originating from the middle at base and two sclerotized median bars connected medially forming a C-shaped structure (Figs. 2B, 3B, 4B). Lateral sclerite membranous, medially with a large brown stripe and two apical stripe forming a U-shaped structure (Figs. 2C, 3C). Cerci long and distinctly sclerotized, generally parallel-sided and rounded, apex with a strong shoe-shaped structure with tapering tip (Fig. 2D).

Female: Unknown.

Etymology: The specific epithet refers to the collector of type specimen.

Remarks: The new species is closely similar to the Illiesonemoura maluksari (Aubert, 1959) from Pakistan in general appearance and the shape of tergum 10. The new species can be distinguished from I. maluksari by the formation of epiproct and paraproct outer lobe. The epiproct of I. maluksari is more prolonged and bears two needle-like arms in the middle and laterally bearing a row of dark spines (see figs. 35–40 in Aubert, 1959), while the new species epiproct is different and without a row of spines (Fig. 4). The outer lobe of I. maluksari has two hooks, while the new species outer lobe lacks a hook (Fig. 2), which easily differentiates the new species.