Pinelema xiushuiensis, Wang & Li, 2016

Wang, Chunxia & Li, Shuqiang, 2016, Four new species of the spider genus Pinelema (Araneae, Telemidae) from caves in South China, Ecologica Montenegrina 7, pp. 546-566 : 556-561

Pinelema xiushuiensis sp. nov.

Figs 9–12 , 17

Type material. Holotype: male, Xiushui Cave [23º34.084'N, 107º40.777'E, 285 m, T: 24°C, H: 90%], Bafeng Mountain , Pinguo County, Baise City , Guangxi Zhuang Autonomous Region, China, 3 August 2009, C. Wang & Z. Yao leg. Paratypes: 16 males, 33 females, same data as holotype .

Etymology. The specific name refers to the type locality; adjective.

Diagnosis. This new species is similar to the generotype P. bailongensis , but can be distinguished by lack of the eyes and whitish opisthosoma (six eyes, blue opisthosoma in P. bailongensis ) ( Figs 9A , 10A ); embolus about 1.4 times longer than tegulum ( Figs 9C–D , 11A–B ) (embolus as long as tegulum in P. bailongensis ); and in the female epigynum with a row of short, slender setae behind epigastric furrow, spermatheca tenuous, ribbon-shaped ( Figs 10C–D , 12C–E ) (epigynum with a row of short, strong spines behind epigastric furrow, spermatheca strong, tube-shaped in P. bailongensis ).

Description. Male (holotype). Total length 1.50 ( Fig. 9A ). Carapace 0.62 long, 0.62 wide. Opisthosoma 0.87 long, 0.75 wide. Sternum 0.35 long, 0.32 wide. Carapace, sternum, legs and chelicerae yellowish; labium and endites yellow. Eye absent. Leg measurements: I 5.99 (1.75, 0.20, 1.87, 1.37, 0.80); II 5.25 (1.50, 0.20, 1.60, 1.20, 0.75); III 3.95 (1.25, 0.15, 1.25, 0.75, 0.55); IV 4.92 (1.60, 0.20, 1.37, 1.00, 0.75). Opisthosoma whitish, circular dorsally. Palp measurements: 1.08 (0.23, 0.10, 0.27, -, 0.48). Palp tarsus ( Figs 9B–D , 11A–B , 12A ): bulb about 1.3 times the length of tarsus, length about 3.0 times longer than wide, embolus long, tube-shaped, approximately 1.4 times longer than tegulum.

Female. Similar to male in coloration and general features, but with a larger body size and shorter legs. Total length 1.62 ( Figs 10A–B ). Carapace 0.62 long, 0.60 wide. Opisthosoma 0.87 long, 0.87 wide. Sternum 0.40 long, 0.34 wide. Leg measurements: I 5.60 (1.75, 0.20, 1.70, 1.25, 0.70); II 5.20 (1.60, 0.20, 1.55, 1.10, 0.75); III 3.55 (1.15, 0.15, 1.00, 0.70, 0.55); IV 4.60 (1.50, 0.20, 1.35, 0.95, 0.60). Epigynum ( Fig. 12B ) with a row of short, slender setae behind epigastric furrow. Spermatheca ( Figs 10C–D , 12C–E ) tenuous, ribbon-shaped, distal part swollen and reflexed.

Variation. Total length: males 1.58–1.62 (n = 17), females (1.45–1.54) (n=33).

Distribution. Known only from the type locality in Guangxi, China ( Fig. 17 ).

Figures

FIGURE 9. Pinelema xiushuiensis sp. nov., male holotype. A. Habitus, dorsal view; B. Embolus tip, apical view; C. Palp, prolateral view; D. Palp, retrolateral view.

FIGURE 10. Pinelema xiushuiensis sp. nov., female paratype. A. Habitus, dorsal view; B. Habitus, ventral view; C. Spermatheca, distal view; D. Spermatheca, apical view.

FIGURE 11. Pinelema xiushuiensis sp. nov., male holotype. A. Palp, prolateral view; B. Palp, retrolateral view; C. Chelicera, posterior view; D. Colulus ventral view. Scale bars: 0.10 mm.

FIGURE 12. Pinelema xiushuiensis sp. nov., male holotype (A) and Female paratype (B–E). A. Embolus tip, apical view; B Epigynum, ventral view; C. Spermatheca, lateral view; D. Spermatheca, distal view; E. Spermatheca, apical view. Scale bars: 0.10 mm.

FIGURE 17. Localities records for four new species of the genus Pinelema from Southwest China.