Clubiona tiane Yu & Li, 2019

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 tiane Yu & Li, 2019 Figs 19 , 54D , 64D , 74D , 82D , 90D

Clubiona tiane Yu & Li, 2019b: 204, figs 3A-E, 4A-C (♂).

Material examined.

Types. Holotype ♂ (IZCAS Ar 34703), China: Yunnan Province: Xishuangbanna: Mengla County: Menglun Town : XTBG, bamboo Clubiona plantation , 21°53.642'N, 101°16.940'E, ca. 589 m, 22.VII.2018, H. Yu and Z.G. Chen leg. Other material examined. 1♂ (YHCLU0054), XTBG, rubber-tea Clubiona plantation , 21°55.233'N, 101°15.850'E, ca. 572 m, 16.VII.2018, Hao Yu et al. leg; 1♀ (YHCLU0053), XTBG, Rainforest Nature Park, 21°55.017'N, 101°16.450'E, ca. 572 m, 16.VII.2018, H. Yu et al. leg.

Diagnosis.

Females of C. tiane resemble those of C. dactylina ( Liu et al. 2016: figs 18, 19, 23, 24) in having a semi-circular atrium and tubular spermathecae but differ in the following: (1) indistinct copulatory openings hidden at anterior sides of atrial border (Figs 19A-C , 74D , 82D ) (vs. distinct copulatory openings located posteriorly in atrium; Liu et al. 2016: figs 18, 23); (2) more or less lengthwise, thick spermathecae (Figs 19D, E , 90D ) (vs. nearly horizontal and relatively thin spermathecae); (3) distinct and thick spermathecal heads (Figs 19D, E , 90D ) (vs. indistinct and relatively small spermathecal heads; Liu et al. 2016: figs 19, 24). Males of C. tiane can be easily recognised by the curved embolus shaped like a swan’s neck (Figs 54D , 64D ).

Description.

Male. See Yu and Li (2019b). Male palp as in Figs 54D , 64D .

Female (Fig. 19F, G ). Total length 3.90; carapace 1.77 long, 1.06 wide; opisthosoma 2.14 long, 0.93 wide. Carapace light grey except brownish ocular area, without pattern; ocular region slightly narrowed, cervical groove and radial grooves indistinguishable; tegument smooth, all setae detached in ethanol. Eyes: both AER and PER slightly recurved in dorsal view, PER slightly wider than AER. Eye sizes and interdistances: AME 0.09, ALE 0.09, PME 0.10, PLE 0.08, AME-AME 0.09, AME-ALE 0.06, PME-PME 0.17, PME-PLE 0.12, MOQL 0.23, MOQA 0.31, MOQP 0.32. Chelicerae coloured as ocular area, with six promarginal and four retromarginal teeth. Sternum yellowish white, 0.94 long, 0.61 wide. Labium and endites brownish. Legs yellowish white, without distinct markings. Leg measurements: I 2.38 (0.68, 1.12, 0.28, 0.30), II 2.87 (0.87, 1.25, 0.35, 0.39), III 2.30 (0.63, 0.63, 0.79, 0.25), IV 3.78 (1.39, 1.19, 0.88, 0.32). Abdomen elongate, oval, nearly pure white, with inconspicuous anterior setal tufts, dorsum clothed with dense setae; venter uniformly white, without pattern.

Epigyne (Figs 19A-E , 74D , 82D , 90D ). Epigynal plate slightly wider than long, margin not rebordered, spermathecae and bursae obscured through epigynal plate in ventral view. Atrium small, semi-circular, ca. 1/4 of epigyne width, anterior atrial border heavily sclerotised. Copulatory openings indistinct, hidden by anterior margin of atrium. Copulatory ducts indistinct, directed posteriorly to connect with spermathecae. Spermathecae longitudinal, with short, acicular fertilisation ducts. Spermathecal heads digitiform and horizontal, arising on the proximal part of the spermathecae. Bursae ovoid, large, close together, ca. 1.7 × longer than wide, surface translucent, with a wrinkled and ribbed appearance.

Distribution.

Known only from Xishuangbanna.

Remarks.

The female of the species is described for the first time.

Figures

Figure 19. Clubiona tiane, epigyne (A-E) and female 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; CO = copulatory opening; FD = fertilisation duct; SH = spermathecal head; SP = spermatheca. Scale bars: 0.1 mm (equal for A-E); 1 mm (equal for F, G).

Figure 54. Clubiona spp. of the C. corticalis group, male palp, ventral view A C. didentata B C. kai C C. subyaginumai D C. tiane. Abbreviations: C = conductor; E = embolus; EB = embolar base; TA = tegular apophysis. Scale bars: 0.1 mm.

Figure 64. Clubiona spp. of the C. corticalis group, male palp, retrolateral view A C. didentata B C. kai C C. subyaginumai D C. tiane. Abbreviations: C = conductor; E = embolus; TA = tegular apophysis; RTA = retrolateral tibial apophysis. Scale bars: 0.1 mm.

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.