Xizangiana shenxian Liu & Zhang, 2023

Liu, Bo, Wang, Luyu & Zhang, Feng, 2023, Revision of the genus Xizangiana Sherwood, Li & Zhang, 2022, with descriptions of five new species (Araneae: Gnaphosidae), Zootaxa 5346 (4), pp. 443-468 : 462-465

publication ID

https://doi.org/ 10.11646/zootaxa.5346.4.5

publication LSID

lsid:zoobank.org:pub:E4FD4F32-49FF-4E81-A9B8-AD9F0361DC69

DOI

https://doi.org/10.5281/zenodo.8390569

persistent identifier

https://treatment.plazi.org/id/803A87D0-0673-8D3E-FF01-BCC7FD332814

treatment provided by

Plazi

scientific name

Xizangiana shenxian Liu & Zhang
status

sp. nov.

Xizangiana shenxian Liu & Zhang , sp. n.

(DZNjqǥ)

Figs 2F–H View FIGURE 2 , 3D View FIGURE 3 , 20A–B View FIGURE 20 , 21–22 View FIGURE 21 View FIGURE 22

Type material. Holotype ♁ (MHBU-ARA-2018-151-1), CHINA: Xizang Autonomous Region , Rigaze City, Lazi County, Chawu Village , 29°04.655'N, 87°34.009'E, 4133 m elev., 14 July 2018, leg. Luyu Wang. GoogleMaps Paratype: 1♁ (MHBU-ARA-2018-151-2), 2♀ (MHBU-ARA-2018-151-3 to 4), same data as holotype; 3♁ (MHBU-ARA-2020- 60-1 to 3), 1♀ (MHBU-ARA-2020-60-4), same data as holotype, except 21 July 2020 GoogleMaps .

Etymology. The species name is from the Chinese word “shenxian”, which means gods and immortals, referring to the type locality Lazi County, which means the abode of “shenxian” in Tibetan; noun in apposition.

Diagnosis. Male differs from all congeners by the curved embolus with edge angle and a spine-like retrolateral projection, the presence of saw-like edges on the branched, finger-shaped, ventrally originating embolar base projection, and the presence of a relatively small membranous projection ( Fig. 22 View FIGURE 22 ). Female resembles X. longlin sp. n., but can be distinguished by the atrium having ratio of postior part to anterior part almost 1.5 ( Fig. 20A–B View FIGURE 20 ; vs. atrium having ratio of postior part to anterior part almost 2, Fig. 17 View FIGURE 17 ), 11 transversal folds weakly sclerotized, and copulatory duct relatively straight ( Fig. 20B View FIGURE 20 , vs. eight transversal folds strongly sclerotized, and copulatory duct relatively curved, Fig. 17B View FIGURE 17 ).

Description. Male. Total length 4.79–5.52. Holotype (Fig. C–D; MHBU-ARA-2018-151-1): total length 5.46; carapace 2.64 long, 2.12 wide; abdomen 2.82 long, 1.92 wide. Eye sizes and interdistances: AME 0.13, ALE 0.13, PME 0.09, PLE 0.10; AME‒AME 0.03, AME‒ALE 0.02, PME‒PME 0.07, PME‒PLE 0.09, ALE‒PLE 0.09. Leg measurements: I 8.16 (2.31, 1.04, 2.09, 1.59, 1.13), II 6.35 (1.76, 0.77, 1.52, 1.27, 1.03), III 5.48 (1.55, 0.58, 1.11, 1.37, 0.87), IV 8.10 (2.14, 0.88, 1.78, 2.40, 0.90). Leg formula: 1423. Cheliceral promargin with four teeth, retromargin with two ( Fig. 2H View FIGURE 2 ). Color in alcohol ( Fig. 21C–D View FIGURE 21 ): carapace dark brown; legs yellow-brown.

Palp ( Figs 3D View FIGURE 3 , 22 View FIGURE 22 ). Retrolateral tibial apophysis broad with a relatively small membranous projection dorsally; embolar radix projection absent; embolar base projection finger-shaped, branched, with saw-like edges; embolus sharply curved retrolaterally, with edge angle and a spine-like retrolateral projection; median apophysis curved, with broad base, narrow curved distal part with expanded apex.

Female. Total length 5.59–6.85. One paratype (Fig. A–B; MHBU-ARA-2018-151-3): total length 6.51; carapace 2.89 long, 2.21 wide; abdomen 3.62 long, 2.09 wide. Eye sizes and interdistances: AME 0.16, ALE 0.14, PME 0.06, PLE 0.09; AME‒AME 0.03, AME‒ALE 0.02, PME‒PME 0.07, PME‒PLE 0.09, ALE‒PLE 0.08. Leg measurements: I 7.01 (2.06, 1.01, 1.76, 1.19, 0.99), II 6.09 (1.75, 0.79, 1.49, 1.14, 0.92), III 5.65 (1.48, 0.63, 1.24, 1.35, 0.95), IV 8.15 (2.18, 0.85, 1.74, 2.26, 1.12). Leg formula: 4123. Cheliceral promargin with six teeth, retromargin with two ( Fig. 2F–G View FIGURE 2 ). Color in alcohol ( Fig. 21A–B View FIGURE 21 ) as in male.

Epigyne ( Fig. 20A–B View FIGURE 20 ). Atrium almost trapezoidal, with 11 weakly sclerotized transversal folds; scape long and wide, with a ratio of length to width more than 1.5; anterior fold with weakly sclerotized anterior and strongly sclerotized posterior parts; anterior parts of the lateral folds covered by the scape; posterior parts of the lateral folds chevron-like; copulatory duct relatively straight; secondary spermathecae oval, small.

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

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Gnaphosidae

Genus

Xizangiana

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