Nusatidia mianju Yu & Li, 2021

Zhang, Jianshuang, Yu, Hao & Li, Shuqiang, 2021, On the clubionid spiders (Araneae, Clubionidae) from Xishuangbanna, China, with descriptions of two new genera and seven new species, ZooKeys 1062, pp. 73-122 : 73

Nusatidia mianju Yu & Li sp. nov.

Fig. 13

Type material.

Holotype ♀ (IZCAS-Ar34730), China: Yunnan: Mengla County: Menglun Town: Menglun Nature Reserve: 48 km landmark in Nature Reserve, seasonal rainforest (21°58.704'N, 101°19.748'E, 1080 m), 12 August 2011, G. Zheng leg.

Other material examined.

China: Yunnan: Xishuangbanna: Mengla County: Meng'a Town : 1♀ (YHCLU0131), Wengnan Village , secondary seasonal rain forest (22°04.985'N, 100°22.217'E, 1130 m), 25 June 2012, Q. Zhao leg.

Etymology.

The specific name is derived from the Chinese pinyin miàn jù, for mask, referring to the conspicuousness of the spermathecae and copulatory ducts through the epigynal plate, the general appearance of a mask; noun in apposition.

Diagnosis.

Females of N. mianju sp. nov. are similar to those of N. melanobursa Deeleman-Reinhold, 2001 by the epigynal plate with a heavily sclerotised and convex posterior margin, and by the similar course of the copulatory ducts, but they can be differentiated by the copulatory openings separated by ~ 2 diameters (Fig. 13A, B ) (vs. copulatory openings close together). Nusatidia mianju sp. nov. also resembles N. camouflata by the copulatory openings located at the posterolateral margin of the epigynal plate, separated by> 1.5 diameters, but it can be easily distinguished by having the copulatory ducts close together and ascending longitudinally (vs. copulatory ducts separated by> one diameter, running horizontally).

Description.

Female (holotype) (Fig. 13F-G ): Total length 6.85; carapace 2.63 long, 1.67 wide; opisthosoma 4.22 long, 0.98 wide. Carapace light green, slightly lighter in cephalic area, without distinct colour pattern; cephalic region slightly narrowed, cervical groove, radial grooves, fovea indistinct. Eyes: AER slightly recurved, PER wider than AER and slightly procurved when seen from above. AME dark, other eyes light; with black rings. Eye sizes and interdistances: AME 0.10, ALE 0.09, PME 0.10, PLE 0.09, AME-AME 0.06, AME-ALE 0.08, PME-PME 0.23, PME-PLE 0.09, MOQL 0.30, MOQA 0.27, MOQP 0.47. Chelicerae white, fang light red, both promargin and retromargin with two teeth. Labium and endites light green. Sternum yellowish green. Legs coloured as carapace, without distinct markings. Leg measurements: I (2.03, -, -, -), II 8.42 (2.57, 3.33, 1.74, 0.79), III 5.56 (1.59, 1.99, 1.51, 0.47), IV 8.92 (2.69, 2.84, 2.75, 0.65). Abdomen (Fig. 13F, G ) lanceolate, dorsum uniformly yellowish green; laterally dark green, with numerous longitudinal muscle depressions; venter without pattern, yellowish green centrally, dark green marginally.

Epigyne (Fig. 13A-E ): Plate slightly wider than long, posterior margin heavily sclerotised and convex; spermathecae and copulatory ducts prominently visible through integument; in general appearance, epigynal plate like a mask. Copulatory openings distinct, large, separated by ~ 2 diameters, located at posterolateral margin of the plate. Hyaline copulatory ducts thick, straight, close together, extended to posterior level of spermathecae, then retracing posteriorly to mid-level of vulva, connected laterally to bursae. Spermathecae oval, ~ 1.4 × longer than wide, situated anteriorly, separated by ~ 2/3 width of one spermatheca. Bursae globular, separated by ~ 1.3 diameters, translucent with smooth surface. Fertilisation ducts acicular, ~ 1/2 spermatheca length, located laterally.

Male. Unknown.

Distribution.

Known only from the type locality.

Figures

Figure 13. Holotype female of Nusatidia mianju sp. nov., epigyne (A-E) and habitus (F, G) A intact, ventral view B cleared, ventral view C cleared, ventral view D cleared, dorsal view E cleared, dorsal view F dorsal view G ventral view. Abbreviations: BS = bursa; CD = copulatory duct; CO = copulatory opening; FD = fertilization duct; SP = spermatheca. Scale bars: 0.10 mm (equal for A-E); 1 mm (equal for F, G).