Tenuiphantes ancatus (Zhu, Li & Sha, 1986)

Irfan, Muhammad, Wang, Lu-Yu & Zhang, Zhi-Sheng, 2023, Survey of Linyphiidae spiders (Arachnida: Araneae) from Wulipo National Nature Reserve, Chongqing, China, European Journal of Taxonomy 871, pp. 1-85 : 60-65

Tenuiphantes ancatus (Zhu, Li & Sha, 1986) (垂耳DZ蛛)

Figs 49–51

Lepthyphantes ancatus Li & Zhu, 1989: 38 , figs a–d (Df).

Lepthyphantes ancatus – Song et al. 1999: 181, fig. 101e–f (f).

Tenuiphantes ancatus – Tu et al. 2006: 408, figs 11–14 (Tf from Lepthyphantes ).

Differential diagnosis

The female of Tenuiphantes ancatus resembles that of T. aduncus (Zhi, Li & Sha, 1986) ( Fig. 49A–D , Tu et al. 2006: figs 6–9), but male can be distinguished by the distal arm of paracymbium mid ventrally with a somewhat rectangular projection in ventral view in T. ancatus ( Fig. 49B, D ), whereas distal arm ventrally with a small tooth in T. aduncus (Tu et al. 2006: fig. 1); distal end of terminal apophysis bifurcated, V-shaped in ventral view in T. ancatus ( Fig. 49A ), whereas anterior terminal apophysis apex furnished with thread-like projections and posterior terminal apophysis membranous in T. aduncus (Tu et al. 2006: fig. 2); lamella characteristca with three main branches and apex subdivided into several small branches in T. ancatus ( Fig. 49A–B, D ), whereas relatively simple, lower branch much longer, almost touching the distal part of pit hook in retrolateral view in T. aduncus (Tu et al. 2006: figs 1–2); embolus base with seven dentigerous protrusions in T. ancatus ( Fig. 49A ), whereas with more than 20 dentigerous protrusions in T. aduncus (Tu et al. 2006: fig. 2).

Material examined

CHINA • 5♂♂, 6 ♀♀; Chongqing, Wushan County, Guanyang Town, Zhuxian Township , Putao Village ; 31°15′26.72″ N, 110°4′34.11″ E; elev. 1542 m; 6 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-22-01–11 • 1 ♂, 5 ♀♀; Wushan County, Dangyang Town, Congping Management and Protection Station ; 31°23′47.16″ N, 110°2′3.32″ E; elev. 1970 m; 3 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-22-02–17 • 1 ♂, 12 ♀♀; Wushan County, Dangyang Town, Congping Mountain ; 31°23′47.16″ N, 110°2′28.04″ E; elev. 2150 m; 3 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-22-18–30 • 2 ♂♂, 1♀; Wushan County, Guanyang Town, Zhuxian Township , Zhaoyang Ping ; 31°16′23.77″ N, 110°5′45.79″ E; elev. 1575 m; 5 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-22-31–33 • 1 ♂, 3 ♀♀; Wushan County, Dangyang Town, Wushanya ; 31°28′21.35″ N, 109°59′10.29″ E; elev. 1740 m; 2 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-22-35–38 • 2 ♂♂, 1♀; Wushan County, Guanyang Town, Zhuxian Township , Xiang Yaocai Village ; 31°18′57.96″ N, 110°5′23.55″ E; elev. 1681 m; 6 Oct. 2020; L.Y. Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-22-39–41 • 1 ♀; Wushan County, Dangyang Town, Qiqi Mountain Tunnel ; 31°26′57.00″ N, 109°58′45.57″ E; elev. 1449 m; 2 Oct. 2020; L.Y.Wang, X.W. Zhou, T.Y. Ren, J.X. Zhao and L. Xiao leg.; SWUC-T-LIN-22-42 • 1 ♀; Wushan County, Dangyang Town, Reshuiba ; 31°24′2.02″ N, 109°58′24.16″ E; elev. 790 m; 24 Jul. 2021; Z. S. Zhang, L.Y.Wang and T.Y. Ren leg.; SWUC-T-LIN-22-43 .

Description

Male (SWUC-T-LIN-22-01, Fig. 51A , new to science)

MEASUREMENTS. Total 2.08 long; carapace 1.02 long, 0.84 wide; abdomen 1.08 long, 0.74 wide. Eye sizes and interdistances: AME 0.05, ALE 0.09, PME 0.07, PLE 0.08, AME–AME 0.02, PME–PME 0.04, AME–ALE 0.06, PME–PLE 0.04, ALE–ALE 0.34, PLE–PLE 0.36, ALE–PLE 0.01, AME–PME 0.08.

CEPHALOTHORAX. Carapace yellow, cephalic region slightly elevated; fovea, cervical and radial grooves distinct. Clypeus 0.17 high.

CHELICERAE. With three promarginal and four retromarginal teeth.

LEG MEASUREMENTS. Legs long, yellow, covered with fine spines. Length of legs: I 4.73 (1.14, 1.41, 1.09, 0.73), II 4.12 (1.11, 1.31, 1.02, 0.68), III 3.11 (0.89, 0.95, 0.77, 0.50), IV 4.19 (1.09, 1.34, 1.14, 0.62). Leg formula I-IV-II-III. TmI 0.24 and TmIV absent. Tibial spine formula: 2-2-2-2.

ABDOMEN. Oval, light grey, dorsally with six cheverons posteriorly, ventral side light grey.

PALP ( Fig. 49 ). Patella with long, dorsal spine. Tibia unmodified. Cymbium with proximal apophysis, comma-shaped, tip reaches the base of tibia. Paracymbium large, mid-ventrally with somewhat rectangular projection, apical part elongated with blunt end. Pit hook small, mesally grooved with pointed tip. Lamella characteristca three-branched. Terminal apophysis sclerotized, distal end bifurcated, V-shaped. Embolus long, with seven strong teeth-like protrusions on basal part, apical part slightly grooved.

Female (SWUC-T-LIN-22-02, Figs 50–51B )

For diagnosis and description see Tu et al. 2006.

Distribution

Known from type locality.

Remarks

Shennongjia Forest Region (type locality) situated in Hubei Province adjacent to the Wulipo (NNR), Chongqing, all of the specimens examined here belong to the Tenuiphantes ancatus (Zhu, Li & Sha, 1986) . The genus Tenuiphantes can be diagnosed by the important synapomorphies of (1) the embolus of the male comprising a dentigerous protrusion about halfway down and (2) the epigyne proscapus being broadened at either side by a lateral wing-like extension of the median part of the scapus ( Saaristo & Tanasevitch 1996). Tenuiphantes ancatus shares these snyapomorphies: the embolus of the male of T. ancatus shows a dentigerous protrusion at the base, and the epigyne of the species has lateral wing-like extensions of the median part of the scapus that support the placement of this species in the genus Tenuiphantes .

Figures

Fig. 49. Tenuiphantes ancatus (Zhu, Li & Sha, 1986), ♂ (SWUC-T-LIN-22-01), palp. A. Prolateral view. B. Retrolateral view. C. Dorsal view. D. Ventral view.

Fig. 50. Tenuiphantes ancatus (Zhu, Li & Sha, 1986), ♀ (SWUC-T-LIN-22-02). A, C. Epigyne, ventral view. B. Epigyne, lateral view. D. Epigyne, dorsal view. E. Vulva, anterior view.

Fig. 51. Tenuiphantes ancatus (Zhu, Li & Sha, 1986), habitus, dorsal view. A. ♂ (SWUC-T-LIN-22-01). B. ♀ (SWUC-T-LIN-22-02).