Tinodes yangae Peng & Sun, n. sp.

(Figs 4a–4d)

Description: Length of each forewing 3.5–3.6 mm (n = 1). Specimens in alcohol with compound eyes black, legs and thorax dark brown, abdomen brown dorsally, pale yellow ventrally, wings light brown.

Male genitalia: In lateral view, sternum IX nearly oblong, with each anterodorsal angles produced into projections (Fig. 4c). Tergum IX, segment X and horizontal part of inner branch of phallic sheath process fused into a complex, originating about halfway along upper margin of sternum IX, (Fig. 4c), vertical part of inner branch of phallic sheath process paired, each with three spines apically (Figs 4b, 4c); lateral branch of phallic sheath process paired and sparsely setose, each arched in lateral view and elongate tongue-shaped in dorsal view (Figs 4b, 4c). Superior appendages slightly S-shaped, issuing from protrusion of sternum IX in lateral view (Fig. 4c), extending dorsocaudad beyond apex of phallus (Fig. 4b). Phallus tapering from base to apex, in lateral view its basal half forming angle at about 90° with distal half (Fig. 4c). In dorsal view, phallic guide with apex expanded into a disc (Fig. 4d), in lateral view with apex bifurcate, dorsal branch straight upwards and acute, ventral branch triangular (Fig. 4c). Coxopodites ventrally fused mesally with posterior margin somewhat W-shaped in ventral view (Fig. 4a); in lateral view subrectangular, each with dorsal process triangular, smooth and hairless, and ventral process rounded, setose, shorter than dorsal process (Fig. 4c). Harpagones inserted between dorsal and ventral processes of coxopodite, tongue-shaped, setose and longer than dorsal processes of coxopodites in lateral view (Fig. 4c).

Diagnosis: This species is similar to Tinodes eris Malicky & Sangpradub 2001 (in Malicky et al. 2001) from Thailand. However, the new species can be easily distinguished from it by the inner phallic sheath process with its base fused with the complex of tergum IX and X and the other portion free from the complex, vertical, and bifurcate.

Holotype: Male, P. R. China, Si-chuan Province: Ya-an city, Zhou-gong river, 29.5900°N, 102.5900°E, atl. 600–800 m, 8 June 1996, light trap, leg. L. Yang & X. Wang (NJAU).

Distribution: China (Si-chuan).

Etymology: The new species is named after Prof. Lianfang Yang in honor of her great contributions to the Trichoptera fauna of China.