Sinoderces luohanensis Li & Li

Bai, Zilong, Li, Fengyuan & Li, Shuqiang, 2019, Ten new species of the spider genus Sinoderces Li & Li, 2017 from China, Laos and Thailand (Araneae, Psilodercidae), ZooKeys 886, pp. 79-111 : 79

publication ID	https://dx.doi.org/10.3897/zookeys.886.39212
publication LSID	lsid:zoobank.org:pub:FF4F3062-D283-4B5D-80C3-AEFC6361CE39
persistent identifier	https://treatment.plazi.org/id/799B35DB-C8C5-52A3-A47C-51C23E7E54DC
treatment provided by	ZooKeys by Pensoft
scientific name	Sinoderces luohanensis Li & Li
status	sp. nov.

Treatment

Sinoderces luohanensis Li & Li sp. nov. Figs 3 View Figure 3 , 4 View Figure 4 , 21 View Figure 21 , 22 View Figure 22

Types.

Holotype: ♂, outside of Luohan Cave, Suwei Town, Mu Village, Nanning City, Guangxi Zhuang Autonomous Region, China, 22°32.600'N, 108°03.390'E, 270 m, 9.V. 2015, Chen Z. and Li F. leg. Paratypes: 3♀, same data as holotype.

Etymology.

The specific name refers to the name of the cave; adjective.

Diagnosis.

Sinoderces luohanensis sp. nov. resembles S. nawanensis in shape and size ( Fig. 4 C–E View Figure 4 ). Males can be distinguished from the latter by the pointed tip of the conductor (vs. blunt tip in S. nawanensis ) ( Fig. 3 View Figure 3 ). Females can be distinguished by the hairless upper part of abdomen (vs. a row of hairs on the same position in S. nawanensis ) ( Fig. 4B View Figure 4 ). The two pairs of spermathecae have a similar shape, but the terminus of the long pair of spermathecae bends upward in S. luohanensis sp. nov. (vs. bending downward in S. nawanensis ) ( Fig. 4A View Figure 4 ).

Description.

Male (holotype). Total length 1.66; carapace 0.66 long, 0.71 wide; abdomen 1.00 long, 0.64 wide. Carapace round, brown, with darker brown lateral margins. Carapace with large, brown, fork-shaped pattern in the middle ( Fig. 4E View Figure 4 ). Clypeus brown. Cheliceral promargin with two teeth, followed by a lamina; retromargin with no tooth ( Fig. 21B View Figure 21 ). Labium brown. Sternum brown. Legs brownish yellow, with dark brown joints. Leg measurements: I 8.32 (2.28, 0.25, 2.50, 2.16, 1.13) II 6.43 (1.84, 0.25, 1.88, 1.58, 0.88), III 5.05 (1.44, 0.25, 1.50, 1.25, 0.61), IV 7.26 (2.00, 0.25, 2.21, 1.90, 0.90). Abdomen elongated, wrinkled posteriorly. Spinnerets brown ( Fig. 4E View Figure 4 ).

Male palp ( Fig. 3 A–D View Figure 3 ): The overall structure is sickle-shaped. Conductor tip pointed. Embolus curved. Bulb yellow, oval. Conductor and embolus clearly separated, with bases at the distal end of the bulb. Terminal tibia hump with long hairs. Femur and trochanter light yellow with isolated hairs.

Female. Color similar to male, and body size slightly larger than males ( Fig. 4 C–E View Figure 4 ). Abdomen darker than that in males. Clypeus brown. Carapace round, darker than that of males. Labium and sternum dark brown. Measurements: total length 2.20; carapace 0.64 long, 0.70 wide; abdomen 1.25 long, 0.55 wide. Legs brownish yellow, the joint is dark brown. Leg measurements: I 6.53 (1.75, 0.25, 2.00, 1.63, 0.90), II 5.20 (1.37, 0.25, 1.58, 1.25, 0.75), III 4.31 (1.13, 0.25, 1.25, 1.03, 0.65) IV 6.16 (1.72, 0.25, 1.91, 1.50, 0.78). Abdomen elongated, dorsum with white spots and wrinkles, ventrum with white rings. Epigyne pale yellow. Spinnerets brown.

Epigyne ( Fig. 4A, B View Figure 4 ): Epigynal area lighter in color than other parts of the abdomen. Two pairs of elongated, curved spermathecae. Terminus of the lateral pair of spermathecae bends upward ( Fig. 4A View Figure 4 ).

Distribution.

Known only from the type locality ( Fig. 22 View Figure 22 ).

Natural history.

Collected at a cave entrance at an elevation of 196 m.