Hippasosa yunnanensis Wang, Irfan & Zhang, 2025, sp. nov.

Hippasosa yunnanensis sp. nov. Figs 1 C, 4 A – D, 5 A – H, 6 A, 6 D, 7 Type material. Holotype • ♂, China, Yunnan Province, Yuanjiang County, Lijiang Town, Nanhun Village, 23°26.502'N, 102°11.534'E, elev. 508 m, 13 June 2017, L. Y. Wang, R. B. Wu and Y. J. Lin leg.; SWUC -T-LY-21-01. Paratypes: • 1 ♂ 2 ♀, with same data as holotype; SWUC -T-LY-21-02 to 04. Etymology. The species is named for the province in China where the type locality is located. Diagnosis. Males of Hippasosa yunnanensis sp. nov. resemble those of H. qiongzhongensis in having a similar body and palpal conformation (Figs 4 – 6; Wang et al. 2021: fig. 33–35), but the new species differs from the latter in having the prolateral edge of the palea broad and rectangular (Figs 4 A, 5 C – F, 6 A) vs small and crescent-shaped in H. qiongzhongensis (Fig. 6 B, C) and the retrolateral arm of the median apophysis slightly spiral (Figs 4 A, B, 5 C – F) vs strongly spiral in H. qiongzhongensis (Wang et al. 2021: fig. 33 C – F, 34 A, B, 35 A). The epigynal septum has a ridged stem (Figs 4 C, 5 G, 6 D) vs depressed in H. qiongzhongensis (Fig. 6 E). Description. Male (holotype, Fig. 5 A). Total length 15.86. Prosoma 9.49 long, 7.11 wide; opisthosoma 6.65 long, 4.31 wide. Carapace yellowish brown. Eye region black. Fovea longitudinal. Cervical groove indistinct, radial furrows distinct. Eye sizes and interdistances: AME 0.45, ALE 0.31, PME 0.68, PLE 0.64; AME – AME 0.25, AME – ALE 0.12, PME – PME 0.55, PME – PLE 0.54. Clypeus height 0.35. Chelicerae elongate, blackish brown, with two promarginal and three retromarginal teeth. Labium and endites yellowish brown, longer than wide. Sternum yellowish brown, scutellate, with brown setae. Legs yellowish brown, with black pigmentation. Leg measurements: I 26.20 (7.61, 8.27, 6.18, 4.14); II 27.57 (7.46, 9.19, 6.62, 4.30); III 28.35 (7.67, 9.48, 7.02, 4.18); IV 33.59 (8.67, 10.90, 9.10, 4.92). Leg formula: 4321. Opisthosoma oval; dorsum yellowish brown, with black marking, and lanceolate cardiac mark in anterior half. Venter yellowish brown. Palp (Figs 4 A, B, 5 C – F, 6 A). Subtegulum situated prolaterally at the base of the bulb. Terminal apophysis with three spiny branches; third branch membranous. Median apophysis sinuous, with two arms: anterior arm beak-shaped, retrolateral arm hooked, helical with a twisted tip. Conductor wide, membranous with rounded end. Embolus arched, thin, and long. Female (Paratype, SWUC -T-LY-21-02, Fig. 5 B). Total length 19.20. Prosoma 9.30 long, 7.24 wide; opisthosoma 9.91 long, 7.47 wide. Eye sizes and interdistances: AME 0.44, ALE 0.29, PME 0.77, PLE 0.69; AME – AME 0.27, AME – ALE 0.14, PME – PME 0.43, PME – PLE 0.53. Clypeus height 0.37. Leg measurements: I 26.20 (7.16, 9.20, 5.87, 3.97); II 27.10 (7.45, 9.35, 6.11, 4.19); III 27.77 (7.67, 9.18, 6.91, 4.01); IV 33.09 (8.50, 11.21, 8.72, 4.66). Leg formula: 4321. All other morphological characters as in male. Epigyne (Figs 4 C, D, 5 G, H, 6 D). Posterior margin of septum wavy. Septum longer than wide, anchor-shaped, with a ridged stem. Spermathecal heads large, round. Spermathecal stalk short. Fertilization ducts short. Variation. Males (n = 2): total length 15.86–17.03, female (n = 2): total length 19.20–21.70. Distribution. Known only from the type locality, Yuanjiang County, Yunnan, China (Fig. 7).