Clubiona dichotoma Wang, Chen & Zhang ZS, 2018

Wang, Luyu, Chen, Huiming, Wu, Panlong, Zhang, Feng & Zhang, Zhisheng, 2018, Spider diversity in Fanjing Mountain Nature Reserve, Guizhou, China, II: Clubionidae (Araneae), Zoological Systematics 43 (3), pp. 317-333 : 319-320

Clubiona dichotoma Wang, Chen & Zhang ZS , sp. nov. ( Figs 2A–D , 3A–G )

Material examined. Holotype ♂, China, Guizhou, Fanjing Mountain Reserve, Maxi’ao (28°01.16′N, 108°45.41′E; elev. 1239 m), 11.X.2014, C. Jin & Z.Z. Gao leg. Paratypes. 3♀, same data as holotype ; 1♂, Mianxuling (27°54.54′N, 108°39.83′E; elev. 1974 m), 13.X.2014, C. Jin & Z.Z. Gao leg. ; 1♀, between Jinding and Huixiangping , 1.VIII.2001, J.X. Zhang & Z.S. Zhang leg. ; 1♀, Maxi’ao (28°01.16′N, 108°45.41′E; elev. 1239 m), 5.X.2013, L.Y. Wang, D. Wang & X.K. Jiang leg.

Etymology. The specific name comes from the Greek word “ dichotomus ” and refers to its bifid embolus; adjective.

Diagnosis. The new species is similar to C. subapplanata Wang, Chen & Zhang ZS , sp. nov. ( Figs 14A–D , 15A–F ), but differs by the bifid embolus, the stronger conductor and the presence of a finger-like apophysis on male pedipalpal femur ( Figs 2A–B , 3C–E ) (thinner and not bifid embolus, thinner conductor and absent femoral apophysis in C. subapplanata Wang, Chen & Zhang ZS , sp. nov.), and the slit-like copulatory opening of epigyne ( Figs 2C–D , 3F–G ) (hole-like copulatory opening in C. subapplanata Wang, Chen & Zhang ZS , sp. nov.).

Description. Male total length 4.96–5.06. Holotype ( Fig. 3A ) total length 5.06. Carapace 2.07 long, 1.50 wide; abdomen 2.83 long, 1.33 wide. Carapace yellowish brown. Eye sizes and interdistances: AME 0.09, ALE 0.14, PME 0.13, PLE 0.13; AME–AME 0.04, AME–ALE 0.02, PME–PME 0.15, PME–PLE 0.07, ALE–PLE 0.06. MOA 0.33 long, front width 0.22, back width 0.38. Clypeus height 0.06. Chelicerae yellow brown, with 5 promarginal and 4 retromarginal teeth. Pairs of ventral spines: Tibia I 3; Metatarsus I 1; Tibia II 3; Metatarsus II 1. Leg measurements: I 4.69 (1.33, 1.91, 0.90, 0.55); II 4.99 (1.43, 2.05, 0.97, 0.54); III 4.26 (1.26, 1.47, 1.03, 0.50); IV 6.07 (1.71, 2.04, 1.73, 0.59). Leg formula 4213. Abdomen yellowish brown.

Male pedipalp ( Figs 2A–B , 3C–E ). Femur retrolaterally with a slanting finger-like apophysis bearing a spine, apophysis as long as wide, half-length of femur diameter. Tibia with 3 apophyses: retrolateral apophysis short, almost triangular; ventral apophysis short and blunt; lateral apophysis small, slightly peaked. Conductor strong, arising from the tegulum mesoretrolaterally and extending disto-prolaterally, widest in the mid part. Embolus bifurcated, arising from distal tegulum, tip ventrad. Sperm duct obvious, curved like a fishhook in ventral view.

Female paratypes total length 4.40–5.73. One of them (between Jinding and Huixiangping, Fig. 3B ) total length 5.73. Carapace 2.48 long, 1.73 wide; abdomen 3.46 long, 1.74 wide. Eye sizes and interdistances: AME 0.10, ALE 0.12, PME 0.11, PLE 0.12; AME–AME 0.07, AME–ALE 0.06, PME–PME 0.28, PME–PLE 0.15, ALE–PLE 0.10. MOA 0.33 long, front width 0.27, back width 0.49. Clypeus height 0.06. Chelicerae with 6 promarginal and 4 retromarginal teeth. Leg measurements: I 4.85 (1.45, 1.95, 0.95, 0.50); II 5.22 (1.56, 2.13, 0.99, 0.54); III 4.70 (1.35, 1.69, 1.15, 0.51); IV 6.86 (1.95, 2.42, 1.87, 0.62). Leg formula 4213. Other characters as for male.

Epigyne ( Figs 2C–D , 3F–G ). Copulatory openings small, located anteriorly. Copulatory ducts short and curved, connecting with a pair of large, transparent bursae posteriorly. Spermathecae small, spherical, about half of the diameter of bursae, located meso-laterally, separated by more than one of their own diameter. Fertilization ducts thin and short.

Distribution. Known only from the type locality, Mt. Fanjing, Guizhou, China.

Comment. The species belongs to the C. corticalis -group.

Figures

Figure 2. Clubiona dichotoma Wang, Chen & Zhang ZS, sp. nov. A–B. Holotype male, left pedipalp.A. Ventral view; B. Retrolateral view. C–D. Paratype female, epigyne. C. Ventral view; D. Dorsal view. Abbreviations: B—bursa; CD—copulatory duct; Co— conductor; CO—copulatory opening; Em—embolus; FD—fertilization duct; LTA—lateral tibial apophysis; RTA—retrolateral tibial apophysis; SP—spermathecae; VTA—ventral tibial apophysis. Scale bars=0.2mm.

Figure 3. Clubiona dichotoma Wang, Chen & Zhang ZS, sp. nov. A–B. Habitus, dorsal view.A. Holotype male; B. Paratype female. C–E. Holotype male, left pedipalp.C. Ventral view; D. Retrolateral view; E. Femur, retrolateral view. F–G.Paratype female, epigyne. F. Ventral view; G. Dorsal view. Scale bars: A–B=1mm; C–G=0.2mm.

Figure 14. Clubiona subapplanata Wang, Chen & Zhang ZS, sp. nov. A–B. Holotype male, left pedipalp. A. Ventral view; B. Retrolateral view. C–D. Paratype female, epigyne. C. Ventral view; D. Dorsal view. Abbreviations: B—bursa; CD—copulatory duct; Co—conductor; CO—copulatory opening; Em—embolus; FD—fertilization duct; LTA—lateral tibial apophysis; RTA— retrolateral tibial apophysis; SP—spermathecae; VTA—ventral tibial apophysis. Scale bars=0.2mm.

Figure 15. Clubiona subapplanata Wang, Chen & Zhang ZS, sp. nov. A–B. Habitus, dorsal view. A. Holotype male; B. Paratype female. C–D. Holotype male, left pedipalp. C. Ventral view; D. Retrolateral view. E–F. Paratype female, epigyne. E. Ventral view; F. Dorsal view. Scale bars: A–B=1mm; C–F=0.2mm.