Pimoa samyai Zhang & Li, sp. nov.

Zhang, Xiaoqing, Lan, Tianqi, Nie, Lei & Li, Shuqiang, 2020, Eight new species of the spider genus Pimoa (Araneae, Pimoidae) from Tibet, China, ZooKeys 940, pp. 79-104 : 79

Pimoa samyai Zhang & Li, sp. nov. Figures 12 , 13 , 16

Type material.

Holotype: ♂ (IZCAS-Ar40333), China, Tibet, Lhoka, Samyai Town, along the way to Qingpu Practice Cave, 29.38°N, 91.55°E, elevation ca. 4231 m, 15.VIII.2018, X. Zhang and J. Liu leg. Paratypes: 1♂1♀ (IZCAS-Ar40334-Ar40335), same data as holotype; 2♀ (IZCAS-Ar40336-Ar40337), Lhoka, Aza Town, along the way to Zonggongbu Cave, 29.37°N, 91.32°E, elevation ca. 4389 m, 14.VIII.2018, X. Zhang and J. Liu leg.

Etymology.

The specific name is a noun in apposition taken from the type locality.

Diagnosis.

The male of Pimoa samyai sp. nov. resembles P. binchuanensis (see Zhang and Li 2019: 3, figs 1, 2) and P. crispa Hormiga, 1994 (see Hormiga 1994a: 63, figs 233-238; Hormiga 1994b: fig. 1A, B) but can be distinguished by the short and distally narrow cymbial denticulate process (Fig. 12B , vs. long and distally wide in P. binchuanensis ; vs. distally wide in P. crispa ); distinguished from P. binchuanensis by the nearly L-shaped pimoid cymbial sclerite (Fig. 12B , vs. nearly U-shaped); distinguished from P. crispa by a palpal tibia that is ca. 1/2 of the cymbial length (Fig. 12A-C , vs. tibia almost the same length as cymbium). The female of P. samyai resembles P. crispa Hormiga, 1994 (see Hormiga 1994a: 63, figs 239-247) and P. indiscreta Hormiga, 1994 (see Hormiga 1994a: 66, figs 248-255) but can be distinguished by the distance between the pair of spermathecae which is ca. 1/2 the width of a spermatheca (Fig. 13C , vs. separated by ca. 1/4 the width of a spermatheca in P. crispa and P. indiscreta ) and by the distally wide dorsal plate (Fig. 13C , vs. distally narrow in P. crispa and P. indiscreta ).

Description.

Male (holotype): Total length 6.92. Carapace 3.33 long, 2.63 wide. Abdomen 3.59 long, 2.31 wide. Eye sizes and interdistances: AME 0.16, ALE 0.17, PME 0.15, PLE 0.16; AME-AME 0.14, AME-ALE 0.14, PME-PME 0.16, PME-PLE 0.19. Leg measurements: I: 31.92 (8.85, 10.06, 9.74, 3.27); II: 31.40 (8.33, 9.94, 9.99, 3.14); III: 19.81 (5.83, 6.03, 5.96, 1.99); IV: 25.77 (7.31, 8.27, 7.88, 2.31). Habitus as in Fig. 13E . Carapace yellowish with black lateral margins; thoracic fovea and radial grooves distinct; sternum brownish. Abdomen black with yellowish transverse chevron bands. Legs brownish with black annulations, especially distinct on legs III and IV. Palp (Fig. 12A-C ): patella short, ca. 1/2 of tibial length, with one retrolateral macroseta; tibia long, ca. 1/2 of cymbial length, with several macrosetae and a dorsal process; paracymbium short, ca. 1/3 of cymbial length, hook-shaped; pimoid cymbial sclerite nearly L-shaped, ca. 1/2 of cymbial length; cymbial denticulate process short and distally narrow, with more than ten cuspules; median apophysis indistinct; conductor distinct; pimoid embolic process pointed distally, longer than embolus; embolus beginning at the 5:30 o’clock position; embolic tooth absent.

Female (paratype): Total length 10.51. Carapace 4.81 long, 3.46 wide. Abdomen 5.70 long, 4.42 wide. Eye sizes and interdistances: AME 0.20, ALE 0.20, PME 0.19, PLE 0.19; AME-AME 0.16, AME-ALE 0.17, PME-PME 0.17, PME-PLE 0.23. Leg measurements: I: 31.73 (8.91, 10.51, 9.04, 3.27); II: 28.59 (7.95, 9.49, 8.14, 3.01); III: 20.19 (5.83, 6.54, 5.83, 1.99); IV: 26.85 (7.88, 8.97, 7.50, 2.50). Habitus as in Fig. 13F, G . Carapace yellowish with black lateral margins; thoracic fovea and radial grooves distinct; sternum brownish. Abdomen yellowish with black parts. Legs brownish with distinct black annulations on all legs. Epigyne (Fig. 13A-D ): triangular; ventral plate broad, length subequal to width; dorsal plate longer than wide, nearly tongue-shaped; copulatory openings distinct; spermathecae nearly oval, separated by ca. 1/2 width of spermatheca; fertilization ducts anteriorly oriented.

Distribution.

Known only from the type locality, Tibet, China (Fig. 16 ).

Figures

Figure 12. Left palp of Pimoa samyai sp. nov., holotype A prolateral view B ventral view C retrolateral view. Abbreviations: AS = alveolar sclerite; C = conductor; CDP = cymbial denticulate process; E = embolus; P = paracymbium; PCS = pimoid cymbial sclerite; PEP = pimoid embolic process; T = tegulum. Scale bar: equal for A-C.

Figure 13. Epigyne and habitus of Pimoa samyai sp. nov., female paratype and male holotype A epigyne, ventral view B schematic course of internal duct system, ventral view C vulva, dorsal view D schematic course of internal duct system, dorsal view E male habitus, dorsal view F female habitus, dorsal view G female habitus, ventral view. Abbreviations: CO = copulatory opening; DP = dorsal plate of the epigyne; FD = fertilization duct; S = spermatheca; VP = ventral plate of epigyne. Scale bars: equal for F and G.

Figure 16. Distribution of Pimoa species from Asia. Red dots represent new species, green dots represent previously described species. 1 P. anatolica 2 P. binchuanensis 3 P. clavata 4 P. cona sp. nov. 5 P. crispa 6 P. duiba sp. nov. 7 P. gandhii 8 P. indiscreta 9 P. lata 10 P. lemenba sp. nov. 11 P. lihengae 12 P. mainling sp. nov. 13 P. nematoides 14 P. nyingchi sp. nov. 15 P. reniformis 16 P. rongxar sp. nov. 17 P. samyai sp. nov. 18 P. sinuosa 19 P. thaleri 20 P. trifurcata 21 P. wanglangensis 22 P. xinjianensis 23 P. yadong sp. nov.