Xizangiana linzhiensis

Xizangiana linzhiensis (Hu, 2001)

(Hĭqǥ)

Figs 2A–B, 3A, 4–5, 6A–B

Callilepis linzhiensis Hu, 2001: 229, fig. 123. 1–4 (♀).

Scotophaeus himalayaensis Hu, 2001: 271, fig. 155. 1–5 (♁).

Xizangia linzhiensis Song et al., 2004: 244, 337, fig. 142A–I (♁ ♀, transfer from Callilepis, synonymy of S. himalayaensis).

Xizangiana linzhiensis Sherwood et al., 2022: 64 (transfer from Xizangia).

Type material. Holotype ♀ (MHBU-ARA-005319), CHINA: Xizang Autonomous Region, Linzhi City, 3000 m elev., 30 July 1988, leg. Fuping Zhang. Paratype: 2♀ (MHBU-ARA-005320), same data as holotype; 2♁ (MHBU-ARA-005604 to 5), CHINA: Xizang Autonomous Region, Nyalam County, Zhangmu Town, 25 June 1985, leg. Aihua Li, examined.

Other material examined. 1♁ (MHBU-ARA- 2019-31-1), CHINA: Xizang Autonomous Region, Linzhi City, Bayi District, Bayi Town, Duobu Village, 29°44.061′N, 94°07.546′E, 3099 m elev., 21 May 2019, leg. Luyu Wang; 1♀ (MHBU-ARA-2018-97-1), same data as the male, except 4 July 2018, leg. Luyu Wang; 1♀ (MHBU-ARA-2018-95-1), CHINA: Xizang Autonomous Region, Linzhi City, Mainling County, 29°27.147'N, 94°44.900'E, 2929 m elev., 3 July 2018, leg. Luyu Wang.

Diagnosis. Males differ from all the congeners except X. xiangbi by having retrolateral tibial apophysis with arc-shaped membranous projection (Fig. 3). It can be distinguished from X. xiangbi by having an arc-shaped embolar base projection distolaterally, the absence of radix projection, and the absence of bump on tegulum (Fig. 5; vs. having a hook-like embolar base projection retrolaterally, radix projection present, tegulum with a bump ventrally, Fig. 10). Females can be distinguished from all the congeners by the almost triangular atrium, with five curved, partly sclerotized transversal folds, the heart-shaped, well sclerotized lateral folds, and the presence of a small scape, almost length of primary spermathecae (Fig. 6A–B).

Redescription. Male. Total length 3.66–5.68. One paratype (Figs 4C–D; MHBU-ARA-005604): total length 4.12; carapace 1.91 long, 1.43 wide; abdomen 2.21 long, 1.24 wide. Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.07, PLE 0.08; AME‒AME 0.04, AME‒ALE 0.01, PME‒PME 0.06, PME‒PLE 0.07, ALE‒PLE 0.07. Leg measurements: I 5.18 (1.45, 0.77, 1.11, 0.99, 0.86), II 4.09 (1.21, 0.64, 0.80, 0.81, 0.63), III 3.93 (1.11, 0.54, 0.86, 0.82, 0.60), IV 5.72 (1.46, 0.62, 1.17, 1.65, 0.82). Leg formula: 4123. Cheliceral promargin with four teeth, retromargin with two (Fig. 2B). Color in alcohol (Fig. 4C–D): carapace dark brown; legs yellow-brown.

Palp (Figs 3A, 5). Retrolateral tibial apophysis broad, finger-like, dorsally with an arc-shaped membranous projection; embolar radix fused with embolar base; embolar base distolaterally with an arc-shaped embolar base projection; embolus slightly curved, with pinhead-shaped apex; median apophysis wide at base, narrowest at median part, almost two times as thin as base.

Female. Total length 6.94–8.86. Holotype (Fig. 4A–B; MHBU-ARA-005319): total length 7.86; carapace 3.05 long, 2.34 wide; abdomen 4.81 long, 2.60 wide. Eye sizes and interdistances:AME 0.08, ALE 0.13, PME 0.09, PLE 0.11; AME‒AME 0.08, AME‒ALE 0.03, PME‒PME 0.11, PME‒PLE 0.13, ALE‒PLE 0.10. Leg measurements: I 7.26 (2.16, 1.04, 1.81, 1.26, 0.99), II 6.17 (1.71, 0.73, 1.62, 1.26, 0.85), III 5.45 (1.44, 0.61, 1.37, 1.22, 0.81), IV 8.39 (2.26, 0.95, 1.90, 2.16, 1.12). Leg formula: 4123. Cheliceral promargin with six teeth, retromargin with three (Fig. 2A). Color in alcohol (Fig. 4A–B) as in male.

Epigyne (Fig. 6A–B). Atrium almost triangular, with five transversal folds, partly sclerotized; anterior fold strongly sclerotized; scape oval, small, almost length of primary spermathecae; lateral folds heart-shaped, strongly sclerotized; secondary spermathecae oval, small.

Distribution. China (Xizang) (Fig. 23).