Clubiona xiaokong Yu & Li, 2021

Zhang, Jianshuang, Yu, Hao & Li, Shuqiang, 2021, Taxonomic studies on the sac spider genus Clubiona (Araneae, Clubionidae) from Xishuangbanna Rainforest, China, ZooKeys 1034, pp. 1-163 : 1

Clubiona xiaokong Yu & Li sp. nov. Figs 22 , 74A , 82A , 90A

Holotype.

♀ (IZCAS-Ar 34753), China: Yunnan Province: Xishuangbanna: Mengla County: Menglun Town: XTBG, Anogeissus acuminata Clubiona plantation (ca. 20 yr.), 21°53.819'N, 101°17.075'E, ca. 609 m, 27.XI.2009, G. Tang and Z.Y. Yao leg. Other material examined. 1♀ (YHCLU0078), XTBG, secondary tropical forest, 21°54.833'N, 101°16.781'E, ca. 617 m, 26.IV.2019, Z.G. Chen leg.

Etymology.

The specific name is derived from the Chinese pinyin xiǎo kǒng, which means small opening, referring to the small atrium; noun in apposition.

Diagnosis.

The new species is similar to C. falciforma ( Liu et al. 2016: 567, figs 30, 31, 35, 36) by the ɔc-shaped spermathecae. From C. falciforma , the female of the new species can be easily distinguished by: the nearly trapezoidal atrium distinctly longer than wide (Figs 22A-C , 74A , 82A ) (vs. elliptical atrium wider than long; Liu et al. 2016: figs 30, 35); copulatory openings located at lateral atrial borders (Figs 22A-C , 74A , 82A ) (vs. situated basolaterally in atrium; Liu et al. 2016: figs 30, 35); (and the transverse copulatory ducts (Figs 22D, E , 90A ) (vs. copulatory ducts descending longitudinally; Liu et al. 2016: figs 31, 36).

Description.

Female. Holotype (Fig. 22F, G ): Total length 6.48; carapace 3.28 long, 2.26 wide; opisthosoma 3.19 long, 2.03 wide. Carapace elongate, oval, light brown, uniformly coloured, without pattern, fovea red; pars cephalica slightly narrowed, cervical groove indistinct; tegument smooth, with erect, thin, dark setae on front ridge. Eyes: In dorsal view, AER slightly recurved, PER almost straight, PER wider than AER. Eye sizes and interdistances: AME 0.13, ALE 0.16, PME 0.14, PLE 0.12, AME-AME 0.16, AME-ALE 0.11, PME-PME 0.35, PME-PLE 0.25, MOQL 0.36, MOQA 0.46, MOQP 0.68. Chelicerae protruding and robust, coloured as carapace, with long, orange fangs, with five promarginal and two retromarginal teeth. Sternum nearly white, 1.60 long, 1.10 wide. Labium and endites coloured as carapace. Legs light coloured, dorsally slightly darker, without markings. Leg measurements: I 6.23 (1.76, 2.60, 1.18, 0.68), II 6.87 (2.04, 2.68, 1.34, 0.81), III 5.97 (1.85, 2.15, 1.39, 0.57), IV 8.26 (2.35, 2.72, 2.41, 0.78). Abdomen oval and light brown, without pattern, dorsum densely covered with long, dark setae on a light background; venter sparsely covered with short, white setae.

Epigyne (Figs 22A-E , 74A , 82A , 90A ). Epigynal plate slightly longer than wide, margin not rebordered; spermathecae and bursae indistinctly visible through transparent integument. Atrium represented by small pore, ca. 2 × longer than wide, ca. 1/6 of epigyne length and 1/11 of epigyne width. Copulatory openings large, situated laterally on the atrium. Copulatory ducts short and thick, heavily sclerotised, expanding laterally, then connecting to tubular spermathecae. Spermathecae long, consisting of smooth proximal half and wrinkled distal half, with small fertilisation ducts terminally, proximal half shaped like ɔc, the distal half irregularly shaped. Bursae reniform, close together, distinctly larger than spermathecae, 1.3 × longer than wide, surface translucent and smooth.

Male. Unknown.

Distribution.

Known only from the type locality, Xishuangbanna, Yunnan, China.

Figures

Figure 22. Holotype female of Clubiona xiaokong 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: A = atrium; BS = bursa; CD = copulatory duct; CO = copulatory opening; FD = fertilisation duct; SH = spermathecal head; SP = spermatheca. Scale bars: 0.2 mm (equal for A-E); 2 mm (equal for F, G).

Figure 74. Clubiona spp. of the C. corticalis group, epigyne, intact, ventral view A C. xiaokong sp. nov., holotype B C. zhaoi sp. nov., holotype C C. kai D C. tiane E C. didentata F C. subdidentata sp. nov., holotype. Abbreviations: A = atrium; AM = atrial membrane; CO = copulatory opening. Scale bars: 0.2 mm.

Figure 82. Clubiona spp. of the C. corticalis group, epigyne, cleared, ventral view A C. xiaokong sp. nov., holotype B C. zhaoi sp. nov., holotype C C. kai D C. tiane E C. didentata F C. subdidentata sp. nov., holotype. Abbreviations: A = atrium; AM = atrial membrane; CO = copulatory opening. Scale bars: 0.2 mm.

Figure 90. Clubiona spp. of the C. corticalis group, vulva, cleared, dorsal view A C. xiaokong sp. nov., holotype B C. zhaoi sp. nov., holotype C C. kai D C. tiane E C. didentata F C. subdidentata sp. nov., holotype. Abbreviations: BS = bursa; CD = copulatory duct; FD = fertilisation duct; SH = spermathecal head; SP = spermatheca. Scale bars: 0.2 mm.