Pimoa xinjianensis, Zhang, Xiaoqing & Li, Shuqiang, 2019

Zhang, Xiaoqing & Li, Shuqiang, 2019, On three species of the spider genus Pimoa (Araneae, Pimoidae) from China, ZooKeys 855, pp. 1-13 : 6-8

Pimoa xinjianensis sp. nov. Figs 5, 6, 7

Type material.

Holotype ♂ (IZCAS-Ar39298): China: Hunan: Xiangxi Tujia and Miao Autonomous Prefecture: Longshan County: Xichehe Town: Xinjian Village, Xianren Cave, 29.0855°N, 109.5109°E, 503 m, 26.X.2018, X. Zhang & Z. Chen. Paratypes: 3♀ (IZCAS-Ar39299-Ar39301), same data as holotype; 2♀1♂ (IZCAS-Ar39302-Ar39304), Longshan County: Xichehe Town: Shuitong Village, Yangjia Cave, 29.0879°N, 109.4945°E, 431 m, 26.X.2018, X. Zhang & Z. Chen; 2♀ (IZCAS-Ar39305-Ar39306), Longshan County: Wuya Town: Xiyan Village, Mt. Tianma, unnamed cave, 29.5701°N, 109.7051°E, 840 m, 28.X.2018, X. Zhang & Z. Chen.

Etymology.

The specific name refers to the type locality; adjective.

Diagnosis.

Both sexes of P. xinjianensis sp. nov. can be easily distinguished from other congeners by the strongly reduced (vestigial) eyes. The palp of P. xinjianensis sp. nov. can be distinguished from that of other congeners by the long embolic process (EP), about 2 times longer than the embolus (vs a short embolic process, almost as long as the embolus) (cf. Figs 5, 6). The epigyne of P. xinjianensis sp. nov. differs from other congeners by having distinct (unhidden) copulatory openings (vs hidden or indistinct) (Fig. 6).

Description.

Male (holotype, IZCAS-Ar39298): Total length 3.75. Carapace 1.50 long, 1.30 wide. Abdomen 2.25 long, 1.70 wide. Eyes vestigial (strongly reduced in size). Leg measurements: I: 21.50 (6.50, 6.00, 6.75, 2.25); II: 20.20 (6.00, 5.75, 6.15, 2.30); III: 17.40 (4.75, 5.50, 5.15, 2.00); IV: 20.00 (6.00, 6.75, 5.50, 1.75). Promargin of chelicerae with 3 teeth, retromargin with 2 teeth. Carapace yellowish, the thoracic fovea distinct, sternum yellowish. Abdomen brownish. Legs yellowish, without annulations. Palp: patella short, about 1/2 of tibial length; tibia long, almost as long as cymbial length; paracymbium short, about 1/3 of cymbial length, with rounded tip; cymbial sclerite (CS) short, about 1/3 of cymbial length, with a tapering, black tip; cymbial process (CP) long, about 1/2 of the cymbial length, with more than 13 cuspules; median apophysis (MA) indistinct; embolic process (EP) long, about 2 times longer than the embolus, tip without granulation; embolus bent and long, about 1/2 of cymbial length, beginning at 6:30 o’clock position; embolic tooth distinct (Fig. 5 A–C).

Female (paratype, IZCAS-Ar39299): Total length 4.75. Carapace 1.75 long, 1.50 wide. Abdomen 3.00 long, 2.25 wide. Eyes vestigial (only with 6 white spots). Leg measurements: I: 20.60 (6.20, 6.00, 6.10, 2.30); II: 19.30 (5.95, 5.75, 5.50, 2.10); III: 14.75 (4.75, 4.50, 4.00, 1.50); IV: 18.35 (6.10, 5.25, 5.00, 2.00). Cheliceral teeth as in male. Carapace yellowish; sternum flavescent. Abdomen greyish. Legs reddish, without annulations. Epigyne: trapezoidal; ventral plate (VP) broad, length subequal to width; dorsal plate (DP) triangular; copulatory openings distinct; spermathecae oval, touching each other; fertilization ducts medially oriented (Fig. 6).

Distribution.

Type locality only, Hunan, China (Fig. 7).