Trilacuna guangwu Ma & Tong 2024, sp. nov.

Trilacuna guangwu Ma & Tong sp. nov. Figs 1, 2, 6 C Material examined. Holotype: China • ♂ (SYNU-1179); Sichuan Province, Bazhong City, Nanjiang County, Guangwu Mountain, Taoyuan Scenic Area; 32°40'48"N, 106°48'12"E; 5. VIII. 2014; F. Zhang leg. Etymology. The specific name is a noun in apposition taken from the type locality. Diagnosis. The new species is similar to Trilacuna angularis Tong & Li, 2007, but can be distinguished by the large, thorn-like structure (tls) and brush-like structure (bls) of embolus system (Fig. 2 D, E, J, K) vs lacking, but with several strongly sclerotized sclerites (Tong and Li 2007: fig. 15–18), and slightly elevated epigastric region (Fig. 1 H) vs flat (Tong and Li 2007: fig. 14). Description. Male (Holotype). Body: reddish brown, chelicerae and sternum lighter, legs yellow; habitus as in Fig. 1 A – C; body length 2.05. Carapace: 1.06 long, 0.81 wide; sides granulate, lateral margin rebordered (Fig. 1 D). Eyes: nearly equal sized; posterior eye row straight from above, procurved from front; ALE separated from edge of carapace by 1.4 diameters (Fig. 1 D, F). Mouthparts: chelicerae straight; labium rectangular, anterior margin deeply incised; endites slender, distally not branched, with a membranous region (Figs 1 E, 6 C). Sternum: surface rugose (Fig. 1 E). Abdomen: 1.01 long, 0.65 wide; booklung covers ovoid, surface smooth; sperm pore situated at level of anterior spiracles; apodemes present, posterior spiracles connected by groove; epigastric region slightly elevated (Fig. 1 G, H). Leg spination: legs I-II: tibia: v 2-2 - 2 - 2 - 0, metatarsus: v 2-2 - 0. Palp: orange; 0.66 long (0.21, 0.15, 0.15, 0.15); femur greatly enlarged (width / length = 0.74); bulb quadrangular; embolus system with a large, thorn-like structure (tls), a cluster of brush-like structure (bls), a broad median branch (mb) and a narrow lateral curved branch (lcb) (Fig. 2 A – L). Female. Unknown. Distribution. Known only from the type locality (Fig. 11).