Clubiona xiaoci 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 xiaoci Yu & Li sp. nov. Figs 20 , 21 , 55D , 65D , 75E , 83E , 91E

Holotype

♂ (IZCAS-Ar 34751), China: Yunnan Province: Xishuangbanna: Jinghong City: Menga Town: Wengnan Village: secondary forest, 22°5.020'N, 100°22.087'E, ca. 1118 m, 24.VII.2012, Q.Y. Zhao and Z.G. Chen leg. Paratype: 1♀ (IZCAS-Ar 34752), same data as holotype. Other material examined. 1 ♂ (YHCLU0088) and 1 ♀ (YHCLU0089), same locality and same collectors as holotype, 22°4.997'N, 100°22.223'E, ca. 1137 m, 25.VII.2012.

Etymology.

The specific name is derived from the Chinese pinyin xiǎo cì, which means 'small spines’, referring to the short spines located on the palpal tibia and patella; noun in apposition.

Diagnosis.

Clubiona xiaoci sp. nov. is very similar to C. parconcinna (see Figs 9 , 10 , 55C , 65C , 75C , 83C , 91C and Deeleman-Reinhold 2001: 117, figs 34-40). Males are similar by the palpal tibia with several short spines. Females of C. xiaoci sp. nov. resemble those of C. parconcinna in having similar atrial anterior margins and globular spermathecae. C. xiaoci sp. nov. can be distinguished from C. parconcinna by the following characters: for the males, conductor absent in C. xiaoci sp. nov. (Figs 20 , 55D , 65D ) (vs. distinct; Figs 9B, D, E , 55C , 65C ), retrolateral patellar apophysis with short, modified spines in new species (Figs 20B , 55D , 65D ) (vs. without spines; Figs 9B , 55C , 65C ); for the females, copulatory openings are partly fused in C. xiaoci sp. nov. (Figs 21A, B , 75E , 83E ) (vs. copulatory openings separated; Figs 10A, B , 75C , 83C ), copulatory ducts distinctly shorter and thicker in C. xiaoci sp. nov. (cf. Figs 21C, D , 91E and Figs 10C, D , 91C ).

Description.

Male. Holotype (Fig. 21E, F ): Total length 3.17; carapace 1.51 long, 1.10 wide; opisthosoma 1.66 long, 0.94 wide. Carapace greyish white, slightly lighter in cephalic area, with a pair of short faint lines running longitudinally from behind AME, ocular region distinctly narrowed; cervical groove indistinct; tegument smooth, clothed with short setae. Eyes: AER slightly recurved, PER almost straight, the latter wider than the former. Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.07, PLE 0.06, AME-AME 0.07, AME-ALE 0.05, PME-PME 0.10, PME-PLE 0.07, MOQL 0.19, MOQA 0.23, MOQP 0.31. Chelicerae robust and light orange, with three promarginal and two retromarginal teeth. Sternum pale yellow, 0.83 long, 0.63 wide. Labium and endites coloured as chelicerae. Legs yellowish white, without markings. Leg measurements: I - (1.06, 1.41, 0.75, -), II 4.22 (1.19, 1.76, 0.83, 0.44), III 3.02 (0.93, 1.12, 0.75, 0.22), 4.44 (1.27, 1.43, 1.27, 0.46). Abdomen oval, dorsally light pink with conspicuous anterior setal tufts; venter pale yellow, without pattern.

Palp (Figs 20A-E , 55D , 65D ). Femur unmodified. Patella with single retrolateral apophysis, apophysis with short, modified spines at apex. Tibia short, cup-shaped, retrolaterally with several short spines near base, with two apophyses: a papilliform, partly membranous ventro-retrolateral apophysis and a dorsal one, with a blunt apex, trapezoidal. Cymbium 2.3 × longer than wide. Tegulum elongate, oval, and bulging, 1.5 × longer than wide; sperm duct indistinct in ventral view. Embolus needle-like, distinctly short, originating at distal portion of tegulum, gradually tapering toward tip, apex sharp and prolaterally pointed; embolar base represented by enlarged tubercle.

Female. Paratype (Fig. 21G, H ): total length 3.93; carapace 1.69 long, 1.21 wide; opisthosoma 2.24 long, 1.30 wide. Eye sizes and interdistances: AME 0.09, ALE 0.10, PME 0.10, PLE 0.09, AME-AME 0.05, AME-ALE 0.05, PME-PME 0.19, PME-PLE 0.09, MOQL 0.28, MOQA 0.23, MOQP 0.38. Sternum 0.99 long, 0.67 wide. Leg measurements: I 3.56 (1.11, 1.42, 0.63, 0.41), II 3.80 (1.15, 1.52, 0.67, 0.44), III - (0.90, -, 0.78, 0.34), IV 4.42 (1.32, 1.48, 1.15, 0.47). Distinctly larger and darker than male, other characters as in male.

Epigyne (Figs 21A-D , 75E , 83E , 91E ). Epigynal plate nearly as wide as long, spermathecae distinctly visible through integument. Atrium indistinct, anterior margin rebordered. Copulatory openings small and partly fused, situated anteriorly on atrium. Copulatory ducts short, ascending obliquely, connecting to posteriorly located bursae then ascending to anteriorly located spermathecae. Spermathecae nearly globular, separated by 1.5 diameters. Fertilisation ducts small, acicular, and membranous, located on posterior surface of spermathecae. Bursae reniform, large, close together, ca. 1.25 × longer than wide, surface translucent and wrinkled.

Distribution.

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

Figures

Figure 9. Male palp of Clubiona parconcinna A prolateral view B retrolateral view C bulb, prolateral view D bulb, ventral view E bulb, retrolateral view. Abbreviations: C = conductor; E = embolus; PPA = prolateral patellar apophysis; RPA = retrolateral patellar apophysis; RTA = retrolateral tibial apophysis; VTA = ventral tibial apophysis. Scale bars: 0.1 mm (equal for A, B, equal for C-E).

Figure 10. Clubiona parconcinna, 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: AAM = atrial anterior margin; BS = bursa; CD = copulatory duct; 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 20. Male palp of the holotype of Clubiona xiaoci sp. nov. A prolateral view B retrolateral view C bulb, prolateral view D bulb, ventral view E bulb, retrolateral view. Abbreviations: E = embolus; EB = embolar base; RPA = retrolateral patellar apophysis; RTA = retrolateral tibial apophysis; VTA = ventral tibial apophysis. Scale bars: 0.1 mm (equal for A, B, equal for C-E).

Figure 21. Clubiona xiaoci 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: AAM = atrial anterior margin; BS = bursa; CD = copulatory duct; CO = copulatory opening; FD = fertilisation duct; SP = spermatheca. Scale bars: 0.1 mm (equal for A-D); 1 mm (equal for E, F, equal for G, H).

Figure 55. Clubiona spp. of the C. corticalis group, male palp, ventral view A C. moralis B C. submoralis C C. parconcinna D C. xiaoci sp. nov., holotype. Abbreviations: C = conductor; E = embolus; PPA = prolateral patellar apophysis; RPA = retrolateral patellar apophysis. Scale bars: 0.1 mm.

Figure 65. Clubiona spp. of the C. corticalis group, male palp, retrolateral view A C. moralis B C. submoralis C C. parconcinna D C. xiaoci sp. nov., holotype. Abbreviations: C = conductor; E = embolus; RPA = retrolateral patellar apophysis; RTA, retrolateral tibial apophysis; VTA, ventral tibial apophysis. Scale bars: 0.1 mm.

Figure 75. Clubiona spp. of the C. corticalis group, epigyne, intact, ventral view A C. moralis B C. submoralis C C. parconcinna D C. multidentata E C. xiaoci sp. nov., paratype F C. subyaginumai. Abbreviations: AAM = atrial anterior margin; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 83. Clubiona spp. of the C. corticalis group, epigyne, cleared, ventral view A C. moralis B C. submoralis C C. parconcinna D C. multidentata E C. xiaoci sp. nov., paratype F C. subyaginumai. Abbreviations: AAM = atrial anterior margin; CO = copulatory opening. Scale bars: 0.1 mm.

Figure 91. Clubiona spp. of the C. corticalis group, vulva, cleared, dorsal view A C. moralis B C. submoralis C C. parconcinna D C. multidentata E C. xiaoci sp. nov., paratype F C. subyaginumai. Abbreviations: BS = bursa; CD = copulatory duct; FD = fertilisation duct; SP = spermatheca. Scale bars: 0.1 mm.