Terrilimosina digitata Cao, Dong & Yang, 2025, sp. nov.

Terrilimosina digitata sp. nov. Figs 1 n, 12, 13 Type locality. China: Xizang: Motuo, Mt. Nanzelama, 1930 m, 23. vi. 2018, Liang Wang. Type material. Holotype: China: - Xizang: • ♂; Motuo, Mt. Nanzelama; 1930 m, 23.vi.2018; Liang Wang; in alcohol. (EMCAU). Paratype: • 1 ♂; Same data as holotype. (EMCAU). Diagnosis. Arista ~ 5.1–5.3 × as long as postpedicel. Mid and hind legs pale brown, femur (except base) darker; fore legs yellow. Syntergite 1 + 2 with a weakly sclerotized anteromedial patch (Fig. 12 b). Sternite 5 with triangular, densely setulose posteromedial process (Fig. 13 d). Surstylus with a digital anteroventral projection dorsally (with patch of long bristles internally). Description. Male (Fig. 12 a). Body length 1.6–1.8 mm, wing 1.4–1.6 mm. General color dark brown. Eye height 2.2–2.3 × genal height at point of maximum eye height. One long vibrissa. Antenna pale brown, postpedicel darker; arista ~ 5.1–5.3 × as long as postpedicel. Mid and hind legs pale brown, femur (except base) darker; fore legs yellow. Mid tibial chaetotaxy as in Fig. 12 c, d, ventrally with one very short anteroventral bristle below middle and one longer apical bristle; hind basitarsomere with one short anteroventral bristle basally, one short anterodorsal bristle apically and one short robust ventral spine subapically. Wing (Fig. 1 n) infuscate, pale brownish; C-index = 1.1–1.2; r-m – dm-m: dm-m = 3.3–3.5. Halter with pale brown knob and paler stem. Abdomen pale brown. Tergites and sternites sparsely and shortly setulose; tergites small and weakly sclerotized. Syntergite 1 + 2 with a weakly sclerotized anteromedial patch (Fig. 12 b). Sternite 5 with triangular, densely setulose posteromedial process (Fig. 13 d). Male genitalia: Epandrium (Fig. 13 a, b) sparsely and shortly setulose. Cercus short, with rounded apex, a long bristle basally (Fig. 13 a, b). Surstylus with dense posterior setulae, a digital anteroventral projection dorsally (with patch of long bristles internally), a short anteroventral process ventrally (with a short comb-like row of bristles apically) and a stout tooth-like spine at posterior corner (Fig. 13 a, b). Basiphallus short, with blunt posterior process (Fig. 13 c). Postgonite widened from middle to apex, with a weakly sclerotized patch subapically (with 2 small setulae dorsally) (Fig. 13 c). Distiphallus with a broad dorsal part (with a small sclerite apically) covering slender ventral part with laterodorsal process subapically and sharp apex linking with two long membranous process (Fig. 13 c). Female. Unknown. Etymology. The specific name is derived from the Latin digitatus (digital), and refers to the digital anteroventral projection on the surstylus. Distribution. China (Xizang). Comments. Terrilimosina digitata sp. nov. resembles T. parasmetanai Su, from which it differs in having syntergite 1 + 2 with a weakly sclerotized anteromedial patch (Fig. 12 b), surstylus with a digital anteroventral projection dorsally (with patch of long bristles internally) and a stout tooth-like spine on the posterior corner and the postgonite with a weakly sclerotized dorsal patch (Fig. 13 a – c). Terrilimosina parasmetanai Su has a well sclerotized anteromedial syntergite 1 + 2, surstylus with a sharp anterior process and a well sclerotized postgonite (Fig. 25 a – c).