Clubiona banna 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 banna Yu & Li sp. nov. Figs 32 , 33 , 58C , 68C , 78E , 86E , 94E

Holotype.

♂ (IZCAS-Ar 34760), China: Yunnan Province: Xishuangbanna: Mengla County: Xiaolongha Village, 21°24.798'N, 101°37.880'E, ca. 693 m, 28.VI.2012, Q.Y. Zhao and C.X. Gao leg; paratype: 1♀ (IZCAS-Ar 34761, YHCLU0139), Menglun Town, XTBG, primary tropical seasonal forest, 21°57.445'N, 101°12.997'E, ca. 774 m, 30.VIII.2007, G. Zheng leg. Other material examined. 1♂ (YHCLU0104), same data as holotype.

Etymology.

The species name is derived from the name of the type locality; noun in apposition.

Diagnosis.

Males of C. banna sp. nov. can be easily distinguished from those of all others in the species group by the tegular apophysis, having a tubercle-shaped base and a rostrate tip (Fig. 32B, D, E ). Females of C. banna sp. nov. are similar to those of C. vigil ( Kim and Lee 2014: 38, fig. 26B) by the relatively small atrium (vs. atria usually broad in almost all members of the C. filicata group, including C. circulata , C. reichlini , C. grucollaris and C. lala ; Figs 35A, B , 79A , 87A , 37A, B , 79B , 87B , 41A, B , 79C , 87C , 43A, B , 79D , 87D ) but can be recognised by the atrium being anteriorly elliptic and posteriorly shaped like an inverted triangle (Figs 33A, B , 78E , 86E ) (vs. cordiform in C. vigil ).

Description.

Male. Holotype (Fig. 33E, F ): Total length 6.53; carapace 2.84 long, 2.02 wide; opisthosoma 3.69 long, 1.73 wide. Carapace brown, marginally dark, a pair of Y-shaped black markings starting from behind PME and PLE, almost reaching reddish fovea; pars cephalica distinctly narrowed; cervical groove and radial grooves indistinct; tegument smooth, marginally clothed with short, dense setae. Eyes: in dorsal view, both anterior and posterior eye rows recurved, PER slightly wider than AER. Eye sizes and interdistances: AME 0.11, ALE 0.15, PME 0.15, PLE 0.14, AME-AME 0.14, AME-ALE 0.07, PME-PME 0.26, PME-PLE 0.17, MOQL 0.40, MOQA 0.36, MOQP 0.53. Chelicerae brown, with red fangs, with three promarginal and two retromarginal teeth. Sternum centrally pale brown, marginally dark, 1.52 long, 1.02 wide. Labium and endites coloured as chelicerae. Legs light brown, without distinct markings. Leg measurements: I 9.08 (2.61, 3.60, 1.85, 1.02), II 10.55 (2.87, 3.96, 2.59, 1.13), III 8.25 (2.44, 2.65, 2.46, 0.71), IV 10.98 (3.02, 3.50, 3.43, 1.02). Abdomen: dorsum with broken dark median band in anterior half, posteriorly with 5 chevrons; venter with three dark longitudinal lines.

Palp (Figs 32A-E , 58C , 68C ). Tibia short, ca. 1/3 of cymbium length, with single retrolateral apophysis; hammer-like or clavate RTA small, slightly curved, and bluntly pointed. Tegulum more or less spherical, 2.1 × longer than wide, proapically and apically membranous, slightly excavated prolatero-apically to accommodate embolus; sperm duct sinuate, forming a loop along tegular margin. Embolus filiform, arising at approximately the 9-10 o’clock position, terminating at ca. 12 o’clock position, tip hidden behind conductor. Conductor large, beak-shaped, transversely aligned at the apical portion of the bulb, basal part partly membranous, terminal part heavily sclerotised, directed retrolaterad then abruptly bending distad. Tegular apophysis with tubercle-shaped base and rostrate tip, located at distal-retrolateral position of tegulum (ca. 1 o’clock position of tegulum).

Female. Paratype (Fig. 33G, H ). Total length 8.05; carapace 3.40 long, 2.19 wide; opisthosoma 4.65 long, 2.95 wide. Eye sizes and interdistances: AME 0.15, ALE 0.20, PME 0.18, PLE 0.16, AME-AME 0.11, AME-ALE 0.11, PME-PME 0.31, PME-PLE 0.20, MOQL 0.49, MOQA 0.45, MOQP 0.66. Chelicerae with three promarginal and two retromarginal teeth. Sternum 1.88 long, 1.14 wide. Leg measurements: I 8.71 (2.42, 3.50, 1.78, 1.01), II 9.56 (2.67, 3.71, 2.10, 1.07), III 7.78 (2.23, 2.75, 2.08, 0.72), IV 10.60 (2.86, 3.47, 3.21, 0.97). Colouration lighter than in male. Other characters as in male.

Epigyne (Figs 33A-D , 78E , 86E , 94E ). Epigynal plate nearly square, margin not rebordered, spermathecae and bursae indistinctly visible through integument. Atrium small, with delimited margin, ca. 1/2 epigyne length and 1/3 epigyne width, anteriorly elliptic, posteriorly triangular. Copulatory openings located at lateral atrial borders. Copulatory ducts short, running sideways, then retracing posteriorly to bursae. Spermathecae with subglobular proximal part and tubular distal part; the two proximal parts separated by 0.5 diameters, and the two distal parts close together. Fertilisation ducts short and curved, acicular, located on distal surface of spermathecae. Bursae reniform, ca. 1.5 × longer than wide, close together, surface membranous and smooth.

Distribution.

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

Figures

Figure 32. Male palp of the holotype of Clubiona banna sp. nov. A prolateral view B retrolateral view C bulb, prolateral view D bulb, ventral view E bulb, retrolateral view. Abbreviations: C = conductor; E = embolus; EB = embolar base; RTA = retrolateral tibial apophysis; TA = tegular hump. Scale bars: 0.2 mm (equal for A, B, equal for C-E).

Figure 33. Clubiona banna sp. nov., female paratype and male holotype, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view E dorsal view F Lateral view G dorsal view H ventral view. Abbreviations: A = atrium; BS = bursa; CO = copulatory opening; FD = fertilisation duct; SP = spermatheca. Scale bars: 0.2 mm (equal for A-D); 1 mm (equal for E, F, equal for G, H).

Figure 35. Clubiona circulata, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view E dorsal view F lateral view G dorsal view H ventral view. Abbreviations: A = atrium; AAM = atrial anterior margin; APM = atrial posterior margin; BS = bursa; CD = copulatory duct; CO = copulatory opening; FD = fertilisation duct; SP = spermatheca. Scale bars: 0.2 mm (equal for A-D); 2 mm (equal for E, F, equal for G, H).

Figure 37. Clubiona reichlini, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view E dorsal view F lateral view G dorsal view H ventral view. Abbreviations: A = atrium; AAM = atrial anterior margin; BS = bursa; CO = copulatory opening; FD = fertilisation duct; SB = spermathecal base; SH = spermathecal head; SP = spermatheca; SS = spermathecal stalk. Scale bars: 0.1 mm (equal for A-D); 1 mm (equal for E, F, equal for G, H).

Figure 41. Clubiona grucollaris, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view E dorsal view F lateral view G dorsal view H ventral view. Abbreviations: A = atrium; AAM = atrial anterior margin; BS = bursa; CO = copulatory opening; FD = fertilisation duct; SB = spermathecal base; SH = spermathecal head; SP = spermatheca; SS = spermathecal stalk. Scale bars: 0.2 mm (equal for A-D); 1 mm (equal for E, F, equal for G, H).

Figure 43. Clubiona lala, epigyne (A-D), male habitus (E, F) and female habitus (G, H) A intact, ventral view B cleared, ventral view C cleared, dorsal view D cleared, dorsal view E dorsal view F lateral view G dorsal view H ventral view. Abbreviations: A = atrium; AAM = atrial anterior margin; BS = bursa; CD = copulatory duct; CO = copulatory opening; FD = fertilisation duct; SB = spermathecal base; SH = spermathecal head; SP = spermatheca. Scale bars: 0.2 mm (equal for A-D); 2 mm (equal for E, F, equal for G, H).

Figure 58. Clubiona spp. of the C. filicata group, male palp, ventral view A C. reichlini B C. filicata C C. banna sp. nov., holotype. Abbreviations: C = conductor; E = embolus; EB = embolar base; TA = tegular apophysis; RTA = retrolateral tibial apophysis. Scale bars: 0.1 mm.

Figure 68. Clubiona spp. of the C. filicata group, male palp, retrolateral view A C. reichlini B C. filicata C C. banna sp. nov., holotype. Abbreviations: C = conductor; E = embolus; TA = tegular apophysis; RTA = retrolateral tibial apophysis. Scale bars: 0.1 mm.

Figure 78. Clubiona spp. of the C. trivialis group (A-D) and the C. filicata group (E, F), epigyne, intact, ventral view A C. cheni B C. menglun sp. nov., holotype C C. subasrevida D C. subquebecana E C. banna sp. nov., paratype F C. melanosticta. Abbreviations: A = atrium; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 79. Clubiona spp. of the C. filicata group, epigyne, intact, ventral view A C. circulata B C. reichlini C C. grucollaris D C. lala E C. suthepica F C. yueya. Abbreviations: A = atrium; AAM = atrial anterior margin; APM = atrial posterior margin; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 86. Clubiona spp. of the C. trivialis group (A-D) and the C. filicata group (E, F), epigyne, cleared, ventral view A C. cheni B C. menglun sp. nov., holotype C C. subasrevida D C. subquebecana E C. banna sp. nov., paratype F C. melanosticta. Abbreviations: A = atrium; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 87. Clubiona spp. of the C. filicata group, epigyne, cleared, ventral view A C. circulata B C. reichlini C C. grucollaris D C. lala E C. suthepica F C. yueya. Abbreviations: A = atrium; AAM = atrial anterior margin; APM = atrial posterior margin; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 94. Clubiona spp. of the C. trivialis group (A-D) and the C. filicata group (E, F), vulva, cleared, dorsal view A C. cheni B C. menglun sp. nov., holotype C C. subasrevida D C. subquebecana E C. banna sp. nov., paratype F C. melanosticta. Abbreviations: BS = bursa; CD = copulatory duct; FD = fertilisation duct; SB = spermathecal base; SH = spermathecal head; SP = spermatheca; SS = spermathecal stalk. Scale bars: 0.1 mm.