Pinelema cheni Zhao & Li

Zhao, Huifeng, Yao, Zhiyuan, Song, Yang & Li, Shuqiang, 2018, Taxonomic study of the Pinelemabailongensis species group with descriptions of six new species from China (Araneae, Telemidae), ZooKeys 784, pp. 7-57 : 7

Pinelema cheni Zhao & Li sp. n. Figs 2, 3, 4, 31

Type material.

Holotype ♂ (IZCAS): China, Guangxi Zhuang Autonomous Region, Hechi Prefecture, Du’an County, Gaoling Town, Jiangzhong Village, Huoyan Cave, 24°01.820'N, 108°04.720'E, 243 m, 11.II.2015, Y. Li and Z. Chen leg. Paratypes (IZCAS): 3♂ and 3♀, same data as holotype.

Other material examined.

4♀ (molecular vouchers, IZCAS), same data as holotype.

Etymology.

The specific name is a patronym in honor of the collector Zhigang Chen.

Diagnosis.

Pinelema cheni Zhao & Li, sp. n. can be easily distinguished from all other congeners by following characters: bifurcated tip of embolus (arrow 1 in Figure 3D) (arch-shaped tips on emboli in other congeners), right-angled bend onbulb dorso-subdistally (arrow 2 in Figure 3D) (no right-angled bend on bulbs in other congeners), and smaller Esl/El ratio (0.33-0.37, n = 5, mean: 0.34, Suppl. material 1: Figure S2) (larger Esl/El ratio 0.42-0.78 in other congeners).

Description.

Male (holotype): Total length 1.38. Carapace 0.57 long, 0.51 wide. Abdomen 0.79 long, 0.69 wide. Carapace light brown (Figure 3A). Six eyes ringed with black, clypeus height 0.07, ocular quadrangle 0.17 wide (Figure 3A). Chelicerae, legs, labium, and endites yellow. Sternum light brown with sparse setae. Leg measurements: I 4.58 (1.36, 0.22, 1.48, 0.95, 0.57); II 3.80 (1.13, 0.22, 1.19, 0.75, 0.51); III 2.74 (0.81, 0.20, 0.79, 0.50, 0.44); IV 3.42 (1.06, 0.22, 0.97, 0.71, 0.46). Abdomen light blue with several long setae.

Palp: Tibia 2.8 times longer than patella, cymbium 2.0 times longer than tibia, cymbial apophysis cone-shaped (Figs 2A, 3C); bulb with papillae proximo-retrolaterally (Figure 2B) and a right-angled bend dorso-subdistally (arrow 2 in Figure 3D); embolus tube-shaped, with a bifurcated tip (arrow 1 in Figure 3D), spiral ridge dark brown (Figure 3B), El/Bl ratio 1.65 (Figure 3D), Esl/El ratio 0.37 (Figure 3D).

Female: Total length 1.30. Carapace 0.59 long, 0.54 wide. Abdomen 0.71 long, 0.59 wide. Coloration as in male and abdomen with many long setae (Figure 4A, B). Six eyes, well developed, clypeus height 0.10, ocular quadrangle 0.17 wide (Figure 4A). Leg measurements: I 4.38 (1.31, 0.21, 1.39, 0.86, 0.61); II 3.72 (1.13, 0.21, 1.13, 0.71, 0.54); III 2.73 (0.84, 0.19, 0.78, 0.48, 0.44); IV 3.28(1.03, 0.21, 0.96, 0.62, 0.46). Insemination duct thinner than receptacle (Figure 4C); receptacle with multiple membranous tubes, U-shaped (Figure 4C).

Variation.

In 4♂ paratypes: El/Bl ratio 1.69-1.78, Esl/El ratio 0.33-0.36.

Distribution.

China (Guangxi, Figure 31), known only from the type locality.