Sinoderces taichi 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/91D5EBDE-5C57-4325-BB99-7D19906C45ED
taxon LSID	lsid:zoobank.org:act:91D5EBDE-5C57-4325-BB99-7D19906C45ED
treatment provided by	ZooKeys by Pensoft
scientific name	Sinoderces taichi Li & Li
status	sp. nov.

Treatment

Sinoderces taichi Li & Li sp. nov. Figs 11 View Figure 11 , 12 View Figure 12 , 21 View Figure 21 , 22 View Figure 22

Types.

Holotype: ♂, Lingshui Town, Hainan Province, China. 18°43.777'N, 109°51.740'E, 03.IV.2012, Chen Z. leg. Paratypes: 2♀, same data as holotype.

Etymology.

In ventral view ( Fig. 11A View Figure 11 ), the embolus and conductor resemble the yin-yang symbol representing the philosophy behind the Chinese martial art of Taichi; noun in apposition.

Diagnosis.

Sinoderces taichi sp. nov. resembles S. xueae sp. nov. in having a similarly shaped conductor and embolus. However, the males can be distinguished by the following: six spines on the distal part of the palpal cymbium, as against vs. five in S. xueae sp. nov.; a coiled embolus and long conductor. The edge margin of the epigyne is very thick ( Fig. 12B View Figure 12 ).

Description.

Male (holotype). Total length 1.56; carapace 0.70 long, 0.67 wide; abdomen 0.86 long, 0.64 wide. Carapace round, brown, with dark brown margins and a narrow, brown median line behind ocular area ( Fig. 12E View Figure 12 ). Clypeus dark yellow and chelicerae dark yellow. Cheliceral promargin with one tooth, followed by a lamina, retromargin with one small tooth ( Fig. 21F View Figure 21 ). Endites dark yellow. Labium brown. Sternum dark yellow. Legs brown, joints darker. Leg measurements: I 8.72 (2.44, 0.20, 2.88, 2.40, 0.80), II missing, III 4.98 (1.50, 0.20, 1.40, 1.20, 0.68), IV 7.32 (2.00, 0.20, 2.28, 1.84, 1.00). Abdomen wrinkled posterodorsally, with wide brown markings ( Fig. 12E View Figure 12 ). Spinnerets black.

Male palp ( Fig. 11B View Figure 11 ): Short and thick. Bulb dark yellow, ovate. Embolus arising prolaterally and proximally from the bulb, coiled ( Fig. 11 View Figure 11 ). Conductor arising retrolaterally and distally from the bulb. Embolus and conductor slightly separated (distance less than diameter of bulb). Distal part of the tibia with a row of six spines. Femur and trochanter dark yellow with few hairs.

Female (one of the paratypes). Size and color similar to the male but slightly larger and darker ( Fig. 12C, D View Figure 12 ). Total length 2.125; carapace 0.63 long, 0.63 wide; abdomen 1.50 long, 0.88 wide. Carapace round and brown. Clypeus brown. Chelicerae dark yellow. Endites dark yellow. Labium and sternum dark brown. Legs brown, joints dark. Leg measurements: I 5.28 (1.32, 0.20, 1.64, 1.30, 0.82), II missing, III 3.48 (0.90, 0.20, 0.90, 0.86, 0.62), IV4.92 (1.22, 0.20, 1.52, 1.24, 0.74). Abdomen elongated, dorsum with regular black rings and wrinkles, ventrum with yellow spots ( Fig. 12C, D View Figure 12 ). Spinnerets black.

Epigyne ( Fig. 12A, B View Figure 12 ): Some bristles present above the epigyne ( Fig. 12B View Figure 12 ). The anterior pair is a symmetric c shape. The anterior pair are tubular structures. The posterior pairs are membranous ( Fig. 12A View Figure 12 ).

Distribution.

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

Natural history.

Collected in pristine forest within a protected zone.