Latouchia jinyun Hao, Yu & Zhang, 2025

Figs 2 F, L, 3 F, L, 11, 12

Latouchia jinyun Hao, Yu & Zhang, 2025: 19, figs 5 A – I, 6 A – F, 16 d (described male and female, type locality: China, Chongqing Province, Beibei District, Jinyun Mountain National Nature Reserve, not examined).

Material examined.

• 10 ♀ (HAL-2023-107 – 110, 112–116, 118), China, Sichuan Province, Nanchong City, Gaoping District, Heming Mountain Scenic Area, 23 Dec. 2023, 30.79°N, 106.10°E, elev. 293 m, X. Xu leg. • 2 ♂ 14 ♀ (HAL-2023-121 – 127 A, 128, 130, 131, 133–136, 136 A), China, Sichuan Province, Nanchong City, Gaoping District, Laojun Town, Lingyun Mountain Scenic Area, 24 Dec. 2023, 30.76°N, 106.21°E, elev. 561 m. X. Xu, T. B. Yang leg. • 1 ♂ 14 ♀ (HAL-2023-137 – 141, 144–149, 151, 152, 154, 155), China, Sichuan Province, Nanchong City, Shunqing District, Xishan Scenic Area, 24 Dec. 2023, 30.80°N, 106.05°E, elev. 336 m, X. Xu, T. B. Yang leg.

Diagnosis.

Latouchia jinyun differs from L. jihe sp. nov., L. davidi, L. pavlovi, and L. stridulans by absence of stridulatory ridges on the chelicerae in both sexes. Males of L. jinyun can be distinguished from L. wuhan sp. nov. by longer embolus (Fig. 11 A – I vs Fig. 7 A – F). Females of L. jinyun differ from other Latouchia species by longer, inwardly curved stalks with distinct constriction between lobes and stalks (Fig. 12 A – L).

Redescription.

Male (HAL-2023-139, Figs 2 F, 3 F). Carapace yellowish brown. Cephalic region smoothly elevated. Eight eyes in two rows: anterior row procurved, posterior row straight. Chelicerae dark brown without stridulatory ridges, promargin with five teeth, retromargin with three teeth. Fovea procurved and deep. Sternum yellow with obvious glabrous sigilla. Labium and maxillae brown, without cuspule (Fig. 3 F). Opisthosoma brownish-black with regular light blotches.

Measurements: BL 9.64, CL 4.62 CW 4.23, OL 4.18, OW 3.21; Eye group, EL 0.51, AR 0.82, PR 0.98, AME - AME 0.11, AME 0.14, PME - PME 0.33, PME 0.11, ALE 0.30, PLE 0.28; MaxL 1.65, LL 0.56, LW 0.74; SL 2.80, SW 2.58; leg I 14.42 (4.46, 2.32, 3.13, 2.88, 1.63), leg II 13.09 (4.01, 2.27, 2.50, 2.67, 1.64), leg III 11.05 (2.97, 1.87, 1.49, 2.83, 1.89), leg IV 15.61 (4.31, 2.07, 3.23, 3.77, 2.23). Patellae and tibiae of legs I and II with stout spines; spines on tibiae II slightly thicker than those on tibiae I, most spines on tibiae II bearing hooked tips (Fig. 13 I, J).

Palp. Palpal bulb simple and pyriform in prolateral view; embolus thick at the base, tapering to slender apex and curved at one-third of its length from hook-shaped tip; both prolateral and retrolateral superior keels present (Fig. 11 A – I).

Female (HAL-2023-122, Figs 2 L, 3 L). Carapace yellowish brown. Cephalic region elevated. Eyes in two rows: anterior row procurved, posterior row straight. Chelicerae dark brown without stridulatory ridges, promargin with five teeth, retromargin with three teeth. Fovea procurved and deep. Sternum brown with obvious glabrous sigilla. Labium and maxillae brown, labium with one cuspule, two maxillae together with 61 cuspules along proximal edge (Fig. 3 L). Opisthosoma brownish-black with regular light blotches.

Measurements: BL 13.44, CL 5.39 CW 4.67, OL 6.69, OW 4.63; Eye group, EL 0.79, AR 0.91, PR 0.96, AME - AME 0.13, AME 0.14, PME - PME 0.34, PME 0.12, ALE 0.32, PLE 0.30; MaxL 2.41, LL 0.84, LW 1.06; SL 3.35, SW 3.18; palp 8.37 (3.01, 1.44, 1.87, 2.05), leg I 11.12 (3.81, 2.31, 2.46, 1.41, 1.13), leg II 10.02 (3.34, 2.05, 1.93, 1.44, 1.26), leg III 8.85 (2.93, 1.95, 1.14, 1.46, 1.37), leg IV 13.40 (3.97, 2.34, 2.64, 2.64, 1.81).

Vulva. Paired spermathecae inclined inward, with distinct constriction between lobes and inwardly curved stalks; surfaces densely covered with glandular pores on both elliptical lobes and most of stalks (Fig. 12 A – L).

Variation.

Males and females vary in body size and the number of cheliceral teeth. Measurements for males (N = 3): BL 9.64–10.48, CL 3.87–4.78, CW 3.75–4.36, OL 4.13–4.85, OW 2.74–3.31; Measurements for females (N = 38): BL 9.44–18.10, CL 3.59–6.75, CW 3.27–6.08, OL 4.33–8.79, OW 3.12–6.26. The number of cheliceral teeth on promargin ranges from 5–8.

Genetic distance.

The specimens from Nanchong, Sichuan are identified as L. jinyun because their genital morphology is identical to that of the type specimens from Jinyun Mountain, Chongqing. Genetic divergence between specimens from the two localities is also insufficient to justify treating Nanchong specimens as a separate species. The minimum and maximum genetic distances between the Nanchong specimens and the type specimen from Jinyun Mountain (GenBank accession code: PQ 585635) are 1.65–2.42 % (K 2 P) and 1.63–2.37 % (p - distance), respectively. Within the Nanchong specimens, the minimum and maximum genetic distances range from 0 % to 2.42 % (K 2 P) and 0 % to 2.37 % (p - distance) (Table 1).

Distribution.

Chongqing Municipality, Sichuan Province (Nanchong City).