Xizangiana longlin Liu & Wang & Zhang 2023, sp. n.
Creators: name: Liu, Bo
name: Wang, Luyu
name: Zhang, Feng
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Gnaphosidae
Xizangiana
Xizangiana longlin

description: Xizangiana longlin Liu & Zhang, sp. n.
(AEṚqǥ)
Figs 1B, 2M–O, 3E, 15–17
Type material. Holotype ♁ (MHBU-ARA-2018-103-1), CHINA: Xizang Autonomous Region, Lhasa City, Dazi District, Quyu Village, 29°47.573’N, 91°31.039’E, 3754 m elev., 5 July 2018, leg. LuYu Wang. Paratype: 5♁ (MHBU-ARA-2018-103-2 to 6), 1♀ (MHBU-ARA-2018-103-7), same data as holotype, except 19 July 2020; 1♁ (MHBU-ARA-2022-42-1), same data as previous except Zhangduo Village, 29.796337°N, 91.516653°E, 3716 m elev., 2 July 2022, leg. Bo Liu.
Etymology. The species name comes from the Chinese word “Longlin”, which means Dragon scales, referring to the scaly surface of embolar base projection (Fig. 15A); noun in apposition.
Diagnosis. This new species resembles X. benae sp. n. in genitalic structures, but can be distinguished by the larger body size, the curved embolus, an almost triangular retrolateral tibial apophysis, and the presence of a broom-shaped distolateral embolar base projection (Fig. 16; vs. a relatively straight embolus with edge angle, an almost trapezoidal retrolateral tibial apophysis, and a nail-shaped ventral embolar base projection, Fig. 19) in males, and the v-shaped anterior parts of the lateral folds, the globular secondary spermathecae and the once curved copulatory duct (Fig. 17; vs. arc-shaped anterior parts of the lateral folds, oval secondary spermathecae, and twice curved copulatory duct, Fig. 20C‒D) in females.
Description. Male. Total length 4.03–4.85. Holotype (Fig.A‒B; MHBU-ARA-2018-103-1): total length 4.08; carapace 2.02 long, 1.47 wide; abdomen 2.06 long, 1.39 wide. Eye sizes and interdistances: AME 0.08, ALE 0.11, PME 0.08, PLE 0.08; AME‒AME 0.06, AME‒ALE 0.01, PME‒PME 0.04, PME‒PLE 0.05, ALE‒PLE 0.04. Leg measurements: I 4.96 (1.44, 0.62, 1.22, 0.94, 0.74), II 4.51 (1.26, 0.62, 1.03, 0.83, 0.77), III 3.98 (1.08, 0.48, 0.79, 0.93, 0.70), IV 5.94 (1.49, 0.71, 1.29, 1.57, 0.88). Leg formula: 4123. Cheliceral promargin with four teeth, retromargin with two (Fig. 2M–N). Color in alcohol (Fig. 15A–B): carapace dark brown; legs yellow-brown.
Palp (Figs 3E, 16). Retrolateral tibial apophysis broad, slightly curved with a thin, triangular membranous projection dorsally; embolar radix projection absent; embolar base projection broom-shaped, with saw-like edges and scaly surface; embolus thick, curved; median apophysis with wide base, narrow curved distal part with blunt apex.
Female. Paratype (Fig. C‒D; MHBU-ARA-2018-103-7): total length 5.09; carapace 2.23 long, 1.60 wide; abdomen 2.86 long, 1.61 wide. Eye sizes and interdistances: AME 0.09, ALE 0.14, PME 0.08, PLE 0.09, AME‒ AME 0.02, AME‒ALE 0.02, PME‒PME 0.05, PME‒PLE 0.05, ALE‒PLE 0.07. Leg measurements: I 5.05 (1.57, 0.65, 1.24, 0.82, 0.77), II 4.80 (1.36, 0.71, 1.09, 0.80, 0.84), III 3.09 (0.19, 0.52, 0.77, 0.93, 0.68), IV 6.43 (1.77, 0.80, 1.30, 1.68, 0.88). Leg formula: 4123. Chelicerae (Fig. 2O) as in male. Color in alcohol (Fig. 15C–D) as in male.
Epigyne (Fig. 17A–B).Atrium almost trapezoidal, with eight well sclerotized transversal folds; scape with a ratio of length to width more than 1.5; anterior fold partly sclerotized; anterior parts of the lateral folds and posterior parts of the lateral folds v-shaped, close with each other; copulatory duct curved once anteriorly; secondary spermathecae globular, small.
Distribution. China (Xizang) (Fig. 23).
description: Published as part of Liu, Bo, Wang, Luyu & Zhang, Feng, 2023, Revision of the genus Xizangiana Sherwood, Li & Zhang, 2022, with descriptions of five new species (Araneae: Gnaphosidae), pp. 443-468 in Zootaxa 5346 (4) on pages 458-459, DOI: 10.11646/zootaxa.5346.4.5, http://zenodo.org/record/8390539