Clubiona falciforma, Liu, Ping, Peng, Xianjin & Yan, Hengmei, 2016

Liu, Ping, Peng, Xianjin & Yan, Hengmei, 2016, Five new species of the Clubiona corticalis species group (Araneae, Clubionidae) from China, Zootaxa 4184 (3), pp. 561-575 : 567-570

Clubiona falciforma new species

Figs 25–36

Type material. Holotype: Ƌ from Shanqing (25°48'24"N, 98°31'45"E, 1880 m), Longjing Village , Xinhau Township, Tengchong County, Yunnan Province, China, 27 May 2006, C.M. Yin, J.F. Hu, S.X. He, Y.Y. Wang leg.. Paratypes : CHINA. Yunnan Province: 2 Ƌ, 5 ♀, same data as holotype ; 1 ♀, Tengchong County, Mingguang Township , Zizhi Village (25°46'58"N, 98°36'59"E, 2200 m), 21 May 2006, M. Yang leg. ; 2 Ƌ, Tengchong County, Xinhua Township , Longjing Village (25°48'20"N, 98°30'31"E, 1940 m), 5 June 2006, C.M. Yin, J.F. Hu, M.W. Yang, S.X. He leg. ; 3 Ƌ, 5 ♀, Tengchong County, Puchuan Township , Miguo Village (24°45'40"N, 98°32'14"E, 1920 m), 5 June 2006, C.M. Yin, J.F. Hu, M.W. Yang, S.X. He leg. ; 2 Ƌ, 3 ♀, Tengchong County, Jietou Township , Shaba Village (25°23'33"N, 98°42'12"E, 1850 m), 25 May 2006, X.P. Wang, P. Hu leg..

Etymology. The specific name is the combination of the Latin “ falx ” (sickle) and “ formis ” (form), referring to the falcate conductor; adjective.

Diagnosis. Males and females of Clubiona falciform a n. sp. resemble those of C. allotorta Dankitapexakul & Singtripop, 2008 described from northern Thailand (see Dankittipakul & Singtripop, 2008, figs 24–36), but differ by the digitiform ventral tibial apophysis ( Figs 28 , 33 ); embolus inverted L-shaped, with apex folding transversely in ventral view ( Figs 28 , 33 ); apex of conductor extending to the base of embolus in ventral view ( Figs 28 , 33 ); conductor widest at the middle, its base almost as wide as its apex in retrolateral view ( Figs 29 , 34 ); atrium elliptic, without hood, two times as wide as long ( Figs 30 , 35 ); copulatory ducts almost straight and bursae ovoid, longitudinal ( Figs 31 , 36 ).

Description. Male (holotype): Total length undetermined; carapace 1.90 long, 1.40 wide; abdomen dried. Cephalothorax ( Fig. 25 ). Carapace brownish yellow; chelicerae brownish yellow, promargin with six teeth, fifth largest, retromargin with five subequal teeth; endites and labium brownish yellow; sternum yellow. Eyes. In dorsal view, anterior eye row slightly recurved, posterior eye row almost straight; AME dark, other eyes light, surrounded by black pigment; eye diameters and interdistances: AME 0.08, ALE 0.10, PLE 0.11, PME 0.11, AME–AME 0.05, AME–ALE 0.03, PME–PME 0.18, PME–PLE 0.08; MOQL 0.28, MOQA 0.20, MOQP 0.35. Legs yellow; tibiae I and II with three pairs of ventral spines, metatarsi I and II with one pair of ventral spines; leg measurements: I 4.33 (1.25, 1.75, 0.85, 0.48), II 4.56 (1.40, 1.75, 0.93, 0.48), III 4.06 (1.25, 1.43, 1.0, 0.38), IV 5.85 (1.70, 2.0, 1.65, 0.50); leg formula: IV, II, I, III. Abdomen ( Fig. 25 ) brownish yellow. Palp ( Figs 27–29 , 32–34 ). Femur and patella unmodified, without apophyses; ventral tibial apophysis thumb-shaped, with blunt, membranous apex; retrolateral tibial apophysis flat, triangular, covered by a membranous tibial lamella; cymbium longer than bulb; bulb oval, sperm duct thin, inverted S-shaped in ventral view; conductor falcate; embolus short, wide, gradually tapering toward apex, inverted L-shaped in ventral view.

Female (paratype): Total length 3.76; carapace 1.76 long, 1.30 wide; abdomen 2.0 long, 1.25 wide. Cephalothorax lighter than that of male ( Fig. 26 ). Eye diameters and interdistances: AME 0.05, ALE 0.08, PLE 0.10, PME 0.10, AME–AME 0.08, AME–ALE 0.05, PME–PME 0.20, PME–PLE 0.13; MOQL 0.28, MOQA 0.21, MOQP 0.40. Leg measurements: I 3.35 (0.95, 1.30, 0.75, 0.35), II 3.40 (1.0, 1.50, 0.60, 0.30), III 3.0 (0.90, 1.20, 0.60, 0.30), IV 5.0 (1.45, 1.80, 1.30, 0.45); leg formula: IV, II, I, III. Abdomen ( Fig. 26 ). Dorsum light yellow, with one pair of muscular depressions; venter light yellow; spinnerets yellow. Epigyne ( Figs 30–31 , 35–36 ). Atrium elliptic, located at anterior portion of epigynal plate; two copulatory openings located at basolateral sides of atrial border; copulatory ducts short, extending posteriorly; spermathecae tubular, slender, transversally U-shaped; bursae ovoid, translucent.

Distribution. Presently known only from Yunnan, China.

Figures

FIGURES 25 – 31. Clubiona falciforma n. sp.: male holotype (25, 27 – 29) and female paratype (26, 30 – 31). 25 – 26 habitus, dorsal view; 27 palp, prolateral view; 28 same, ventral view; 29 same, retrolateral view; 30 epigyne, ventral view; 31 vulva, dorsal view. Scale bars: 0.5 mm (25 – 26), 0.1 mm (27 – 31).

FIGURES 32 – 36. Clubiona falciforma n. sp.: male holotype (32 – 34) and female paratype (35 – 36). 32 palp, prolateral view; 33 same, ventral view; 34 same, retrolateral view; 35 epigyne, ventral view; 36 vulva, dorsal view. Abbreviatures: A, Atrium; B, bursa; C, conductor; CD, copulatory duct; CO, copulatory opening; E, embolus; RTA, retrolateral tibial apophysis; SP, spermatheca; VTA, ventral tibial apophysis. Scale bars: 0.1 mm.