Utivarachna gongshanensis, Zhao, Yi & Peng, Xian-Jin, 2014

Zhao, Yi & Peng, Xian-Jin, 2014, Spiders of the genus Utivarachna from China (Araneae: Corinnidae), Zootaxa 3774 (6), pp. 578-588 : 585

Utivarachna gongshanensis sp. nov.

( Figs. 7–9 )

Type material. Holotype: female, China, Yunnan Province, Gongshan County, Dulongjiang Township, Maku, 27.68611ºN, 98.29660ºE, 2097 m, 2 September 2006, Peng Hu (Hu- 060902 –1)

Etymology. The specific name comes from the type locality.

Diagnosis. This species is similar to U. arcuata sp. nov. by the epigynum longer than wide, atrium large, posteriorly located, copulatory duct short, and copulatory opening anterior located, but can be distinguished by having: (1) connecting ducts nearly parallel to each other ( Figs. 7 B–C, 8A–B); (2) anterior bursae about two times longer than wide and extended to the area above the spermathecae ( Figs. 7 C, 8B).

Description. Female (holotype): Total length 5.00. Carapace: 2.65 long, 2.03 wide. Opisthosoma: 2.50 long, 2.05 wide. Eyes sizes and interdistances: AME 0.15, ALE 0.18, PME 0.14, PLE 0.15, AME–AME 0.11, AME– ALE 0.10, AME–PME 0.13, PME–PME 0.23, PME–PLE 0.26, ALE–PLE 0.25. Clypeus 0.20 high. Carapace light brown, with black hairs, without pattern. Anterior eye row slightly recurved, posterior eye row recurved, wider posteriorly. Fovea dark, longitudinal, short bar-shaped. Sternum yellowish brown, lightly colored, with white hairs. Chelicerae light brown with yellow base, with lateral condyle, 3 promarginal and 4 retromarginal teeth. Labium longer than wide. Legs light yellow, without strong spines or ventral cusps, metatarsi III–IV with preening brushes on ventral. Leg measurements: I 7.8 (1.85, 2.40, 2.80, 0.75), II 6.05 (1.80, 2.15, 1.35, 0.75), III 4.65 (1.40, 1.50, 1.15, 0.60), IV 6.05 (1.50, 2.10, 1.70, 0.75), formula: I, II, IV, III. Opisthosoma ovoid, with black hairs. Dorsum ( Fig. 7 A) black gray, with two pairs of muscular impressions, a light median band, cardic area dark, arrow-shaped, anal tubercle white. Venter colored as dorsum, median area with a dark longitudinal band, with scattered irregular black spots. Spinnerets white yellow, anterior ones longest.

Epigynum ( Figs. 7 B, 8A) longer than wide; atrium large, posteriorly located, its posterior margin close to epigastric furrow; copulatory opening located on the top of atrium, almost circular. Vulva ( Figs. 7 C, 8B): copulatory duct short, almost straight; connecting ducts nearly parallel; spermathecae oval, below the bursae; bursae two times longer than wide.

Male: Unknown.

Distribution. China (Yunnan Province).

Figures

FIGURE 7. Utivarachna gongshanensis sp. nov. A. Female habitus, dorsal view. B Epigynum, ventral view. C vulva, dorsal view. Scale bars: A, 1 mm; B, C: 0.1 mm.

FIGURE 8. Utivarachna gongshanensis sp. nov. A Epigynum, ventral view. B Vulva, dorsal view. Scale bars 0.1 mm.

FIGURE 9. Distribution records of the species:, Utivarachna arcuata sp. nov.;, Utivarachna fabaria sp. nov.; ●, Utivarachna gongshanensis sp. nov..