Pimoa pingwuensis, Irfan & Wang & Zhao & Zhang, 2022

Irfan, Muhammad, Wang, Lu-Yu, Zhao, Jingxia & Zhang, Zhi-Sheng, 2022, Three new species of the spider genus Pimoa Chamberlin & Ivie, 1943 (Araneae, Pimoidae) from Qinghai-Tibet Plateau of China, Zootaxa 5092 (3), pp. 318-330 : 321-324

Pimoa pingwuensis new species

Figures 1A–D , 2A–B , 3A–B , 7A–B , 8

Type material. Holotype: Male, China, Sichuan, Pingwu County, Baima Township , 32°42′47″ N, 104°22′35″ E, elev. 1778 m, 15 October 2020, L.Y. Wang, Y. Zhang, J.X. Zhao and J.S. Luo leg. (SWUC-T-PI-03-01) . Paratypes (8 females): 6 females, with same data as for holotype (SWUC-T-PI-03-02~07) ; 2 females, Baima Township , 32°42′46″ N, 104°22′37″ E, elev. 1801 m, 14 October 2018, Z.S. Zhang, L.Y. Wang, Z. Fan, P. Liu and T. Yuan leg. (SWUC-T-PI-03-08~09).

Etymology. The specific name refers to the type locality.

Diagnosis. The male of Pimoa pingwuensis n. sp. most closely resembles P. trifurcata Xu & Li, 2007 ( Xu & Li 2007: 496, figs 49–52), but can be distinguished from all other Pimoa species by the distal-end of the pimoid embolic process paw-shaped with teeth in prolateral view and mouse-shaped in retrolateral view ( Figs 1A–C , 2A, B ). The female of the new species most closely resembles P. clavata Xu & Li, 2007 ( Xu & Li 2007: 487, figs 30–34) in having a similar ventral plate ( Fig. 3A ) and P. crispa (Fage, 1946) ( Hormiga 1994: 63, figs 239–247) in having similar copulatory ducts. However, P. pingwuensis n. sp. can be differentiated by the copulatory opening located postero-ventrally ( Fig. 3A ), whereas located postero-dorsally in P. clavata ; dorsal plate posteriorly with a pointed tip ( Fig. 3B ), whereas blunt tip in P. clavata ; copulatory duct with a single turn located dorso-laterally ( Fig. 3A, B ), whereas located dorso-mesally in P. clavata ; spermathecae touching each other ( Fig. 3A, B ), whereas separated by a minimal distance in P. crispa .

Description. Male (holotype, Fig. 7A ): Total length 8.25. Carapace 3.98 long, 2.73 wide. Abdomen 4.00 long, 2.41 wide. Eye sizes and interdistances: AME 0.18, ALE 0.19, PME 0.19, PLE 0.18; AME–AME 0.11, AME–ALE 0.18, PME–PME 0.16, PME–PLE 0.21. Carapace brownish with black lateral margins; thoracic fovea and radial grooves distinct; sternum brownish. Abdomen black with yellowish transverse chevron bands. Legs brownish with black annulations. Leg measurements: I: 45.93 (12.57, 14.85, 14.51, 4.00); II: 37.52 (10.22, 11.87, 11.99, 3.44); III: 22.91 (6.92, 6.78, 7.13, 2.08); IV: 21.67 (6.88, 6.52, 5.85, 2.43).

Palp ( Figs 1A–D , 2A, B ): tibia longer than wide, half of cymbial length, with several macrosetae and a dorsal process; paracymbium short, one-third of cymbial length, hook-shaped; pimoid cymbial sclerite large, long and subdistally wide and grooved, slightly shorter than cymbial length, V-shaped in ventral view; cymbial denticulate process broad and short, with more than ten cuspules; median apophysis slender, slightly curved with a pointed tip; conductor distinct; pimoid embolic process longer than embolus, distal end paw-shaped with sharp teeth in prolateral view, mouse-shaped in retrolateral view; embolus beginning at the five o’clock position; embolic tooth absent.

Female (paratype, SWUC-T-PI-03-02, Fig. 7B ): Total length 9.58. Carapace 4.50 long, 3.27 wide. Abdomen 5.37 long, 3.40 wide. Eye sizes and interdistances: AME 0.20, ALE 0.19, PME 0.19, PLE 0.21; AME–AME 0.14, AME–ALE 0.23, PME–PME 0.23, PME–PLE 0.28. Carapace brownish with black lateral margins; thoracic fovea and radial grooves distinct; sternum brownish. Abdomen black with yellowish transverse chevron bands and a short vertical band medially. Legs brownish with black annulations. Leg measurements: I: 36.89 (10.08, 12.21, 10.90, 3.70); II: 32.50 (9.01, 10.65, 9.57, 3.27); III: 21.90 (6.51, 6.82, 6.35, 2.22); IV: 28.64 (8.42, 9.57, 8.02, 2.63).

Epigynum ( Fig. 3A, B ): trapezoidal; ventral plate broad, length subequal to width; dorsal plate tongue-shaped; copulatory openings distinct; copulatory ducts with a single turn and not fused; spermathecae round, touching each other; fertilization ducts anteriorly oriented.

Distribution. Known only from the type locality, Sichuan, China ( Fig. 8 ).

Figures

FIGURE 1. Pimoa pingwuensis n. sp., male holotype, left palp. A, Prolateral view; B, Retrolateral view; C, Ventral view; D, Dorsal view. Scale bars, A–D, 0.2 mm.

FIGURE 2. Pimoa pingwuensis n. sp., male holotype, left palp. A, Ventral view; B, Retrolateral view. Scale bars, A, B, 0.5 mm.

FIGURE 3. Pimoa pingwuensis n. sp., female paratype. A, Epigynum, ventral view; B, Vulva, dorsal view. Scale bars, A, B, 0.5 mm.

FIGURE 7. Habitus of Pimoa spp., dorsal view.A, Male holotype of P. pingwuensis n. sp.; B, Female paratype of P. pingwuensis n. sp.; C, Female holotype of P. yajiangensis n. sp.; D, Male holotype of P. zekogensis n. sp. Scale bars, A–D, 2 mm.

FIGURE 8. Distribution of the four new Pimoa species described here.