Tricentrus dexingensis Li & Chen 2026, sp. nov.

3.5. 3.Tricentrus dexingensisLi & Chen sp. nov. Diagnosis. Suprahumeral horns base thick and sturdy, elongate sideways and upwards, dorsal side flattened; absence in male. Posterior pronotal process weak depression on the base, strongly expanded near middle not exceeding apex of suprahumeral horns (Fig. S 10 A – D). Forewing light brown, bearing two spacers of transparent and tawny band, tornus transparent; veins brown except area of transparent (Fig. S 10 H, I). Description. Measurements: Body length: males (n = 2): 3.9–4.0 mm, females (n = 2): 4.6–4.7 mm; forewing length: males (n = 2): 3.5–3.7 mm, females (n = 2): 4.0– 4.1 mm; width between humeral angles apices: males (n = 2): 1.9–2.0 mm, females (n = 2): 2.0– 2.1 mm; width between suprahumeral horns apices: females (n = 2): 2.3–2.5 mm. — Coloration: Female body reddish brown with darker margins, male black (Fig. S 10 A – D). Eyes yellowish brown, male darker; ocelli tangerine yellow, male white (Fig. S 10 E, F). Legs coxae, trochanter, femur black; apical of femur, tibia, tarsus rusty brown, and claw yellow (Fig. S 10 G). — Head: Vertex with dorsal margins bow-shaped, slight depression in the center; ventral margins oblique and weakly wavy (Fig. S 10 E, F). Ocelli slightly closer to inner margins of eyes than to each other. Frontoclypeal margins expanding gradually towards apex in a rectangle, on the same arc with the frontoclypeal lobes apex (Fig. S 10 E, F). — Thorax: Metathoracic leg trochanter with very large spines (Fig. S 10 G). — Male genitalia: Pygofer rectangular in lateral view, dorsal margins base convex (Fig. S 11 A, B, D). Sternite IX rectangular with slightly concave ventral margin in ventral view (Fig. S 11 D). Lateral plate finger-like in dorsal half, base thick and sturdy, right portion weakly depressed, margins setose (Fig. S 11 G). Basal 2 / 3 of subgenital plate fused (Fig. S 11 D). Style clasp angled dorsally; apex laterally recurved, style shank slender, inner surface with setae; connective n-shaped (Fig. S 11 C). Aedeagus uncinate, a quarter apical taper in lateral view, distally with coarse denticles in distal half of dorsal margin; gonopore oval at the apex (Fig. S 11 E, F). — Female genitalia: Pygofer with clearly angulate base and weakly tubular distal portion in lateral view; surface densely setose throughout (Fig. S 12 A, B). Sternite VII U-shaped, triangular shaped on both sides, with posterior margin deeply concave, accounting for nearly all of the width (Fig. S 12 C). First valvulae knife-shaped, exhibiting weak curvature; dorsal margin depressed, base convex, with fine longitudinal striae on about half of its length, and terminating in an acuminate apex (Fig. S 12 D). Second valvulae similar in shape to the first valvulae, dorsal margin of nearly the posterior third bearing contiguous denticles (Fig. S 12 E). Third valvulae (gonoplac) broadly rounded distally (Fig. S 12 F). Material examined. Holotype: CHINA • ♂; Xizang Prov., Linzhi City, Motuo County, Dexing Town (29°19'52.482"N, 95°18'38.6784"E), 735 m; 11 August 2020; Yong-Jin Sui leg. — Paratype: CHINA • 1 ♂ 2 ♀♀; same data as holotype; Yongjin Sui, Xian-Yi Wang leg. Type deposition statement. The holotype and paratype specimens of the new species described herein have been deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC). Distribution. China (Xizang). Etymology. The species is named after the type locality. Remarks. This species is similar to T. dorsocameloideus Yuan & Cui, 1997, but differs from this in (1) suprahumeral horns near quadrilateral in shape with blunt apical margins (triangular with acuminate apices in T. dorsocameloideus); (2) forewings dark brown to blackish; with a hyaline transverse band on the median, and fulvous transverse bands in the subapical area (yellowish-brown with brown on apex in T. dorsocameloideus); (3) leg coxae, trochanter, femur black; apical of femur, tibia, tarsus rusty brown, and claw yellow (trochanter, femur dark brown and the remaining brown in T. dorsocameloideus); (4) forewing veins dark brown (yellow in T. dorsocameloideus).