Icius kui sp. nov. (ẅ伊ø)

Figs 6, 8, 11–13, 68–91

Type material. Holotype: ♂ (MHBU-ARA-00026611), CHINA: Xizang Autonomous Region, Nyingchi City (ö ĭṪ), Gongbogyamda County (工ħȗż县), Jinda Town (aeżā), 30.0326°N, 92.9455°E, 3642 m a.s.l., 6 July 2023, leg. Y. Hou, Z. Yang, Y. Ni & Y. Badan. Paratypes: 2♀ (MHBU-ARA-00026735), same data as the holotype; 2♂ 3♀ (MHBU-ARA-00026608), CHINA: Xizang Autonomous Region, Nyingchi City (öĭṪ), Bome County (DZŶ 县), Sumzom Town (ũâā), 29.7270°N, 96.1325°E, 3075 m a.s.l., 9 July 2023, leg. Y. Hou, Z. Yang, Y. Ni & Y. Badan ; 1♂ 1♀ (MHBU-ARA-00026572), CHINA: Xizang Autonomous Region, Xigaze City (Ƌẹ则Ṫ), Namling County (南Îö县), Nubma Town (奴Ḛ乡), 29.5172°N, 89.6237°E, 4016 m a.s.l., 30 July 2023, leg. Y. Hou, Z. Yang, Y. Ni & Y. Badan.

Etymology. The specific epithet "kui " is from the Chinese pinyin for the sunflower, as the male abdomen bears a marking that is strikingly similar to a sunflower seed; noun in apposition.

Diagnosis. The new species can be separated from I. han sp. nov. and I. kulakangri sp. nov. by the narrower light-colored stripes on the male abdominal dorsum (Fig. 77; vs. the light-colored stripes much wider in the other two species, Figs 54, 97), and the copulatory openings located posterior to the spermathecae (Figs 87, 88, 90, 91; vs. anterior to spermathecae in the other two species, Figs 62, 63, 66, 67, 111, 112, 114, 115). The new species and I. kulakangri sp. nov. both have a slightly bent embolus, but the new species is different in the longer and wider embolus, the broader embolus base in prolateral view, the right-angled retrolateral constriction between the posterior lobe of the tegulum (PL) and tegulum, and the shorter copulatory ducts (Figs 84, 85, 88, 89, 91; vs. embolus shorter and narrower, base of embolus narrower in prolateral view, retrolateral constriction between PL and tegulum not right-angled, and copulatory ducts longer in I. kulakangri sp. nov., Figs 107, 110, 112, 113, 115).

Description. Male. Habitus as in Figs 68, 69, 72, 73, 77, 80. Measurements of holotype: carapace 2.11 long, 1.46 wide, abdomen 2.51 long, 1.54 wide; eye measurements: AME 0.32, ALE 0.19, PME 0.05, PLE 0.16; leg measurements: Ⅰ 4.01 (1.17, 0.77, 1.03, 0.62, 0.42), II 2.60 (0.81, 0.41, 0.55, 0.44, 0.39), III 2.82 (0.86, 0.45, 0.65, 0.38, 0.48), IV 3.48 (1.10, 0.48, 0.70, 0.62, 0.58); leg formula 1432. Carapace brown, with white lateral margins and white stripe in middle, eye field black, with sparse yellow scales (Figs 72, 73, 77, 80). Chelicerae brown, with two promarginal and one retromarginal teeth (Fig. 82). Abdomen dark brown, with two narrow white stripes (Figs 72, 73, 77, 80). Femur to tarsus of legs dark to brown (Figs 72, 73, 81).

Palp (84–86, 89): embolus medium length and slightly bent; tegulum rough; tegular bump medio-retrolaterally located, not prominent in ventral view; RTA dagger-like (Figs 85–86); palp with white scales on dorsal side (Figs 72, 73).

Female. Habitus as in Figs 70, 71, 74–76, 78, 79. Measurements of one paratype (one female in MHBU-ARA-00026735): carapace 1.79 long, 1.52 wide, abdomen 2.28 long, 1.46 wide; eye measurements: AME 0.32, ALE 0.17, PME 0.05, PLE 0.15; leg measurements: Ⅰ 2.91 (0.92, 0.48, 0.66, 0.41, 0.44), II 2.50 (0.76, 0.40, 0.56, 0.32, 0.46), III 2.63 (0.85, 0.32, 0.51, 0.40, 0.55), IV 3.50 (1.09, 0.44, 0.77, 0.61, 0.59); leg formula 4132. Carapace brown, with yellow and white scales (Figs 74–76, 78, 79). Abdomen grey-brown, with middle light-colored foliate marking (Figs 74–76, 78, 79). Legs yellow (Figs 74–76).

Epigynum (Figs 87, 88, 90, 91): copulatory openings separated, located posterior to spermathecae, with two pockets close to genitalic groove. Vulva (Figs 88, 91): copulatory ducts short, with accessory glands distinct and located close to spermathecae; spermathecae small and oval.

Natural history. Found underneath rocks (Figs 6, 8, 12), on tree trunks (Fig. 13), and among bushes; with nest aggregations (Fig. 11).

Distribution. China (Xizang) (Fig. 1).