Clubiona dactylina, 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 : 564-567

Clubiona dactylina new species

Figs 13–24

Type material. Holotype: Ƌ from Bailai Group (28º00'33''N, 98º19'20''E, 1676 m), Longyuan Village , Dulongjiang Township, Gongshan County, Yunnan Province, China, 31 October – 3 November 2004, G. Tang leg.. Paratypes : CHINA. Yunnan Province: 1 Ƌ, 4 ♀, same data as holotype; 1 Ƌ, Gongshan County, Dulongjiang Township , Kongdang Village (27°52'46"N, 98°20'19"E, 1527 m), 25 October 2004, G. Tang leg.

Etymology. The specific name is the combination of the Greek “ dactylus ” (finger) and the suffix “ -inus ” (similar), referring to the digitiform conductor; adjective.

Diagnosis. Males and females of Clubiona dactylina n. sp. resemble those of C. cylindrata Liu, Yan, Griswold & Ubick, 2007 also described from Yunnan, China (see Liu et al., 2007, figs 11–15), but differ by the ventral tibial apophysis extending diagonally upwards in retrolateral view ( Figs 17 , 22 ); embolus originating from the top of the bulb, with only the upper half filiform in prolateral view ( Figs 15 , 20 ); conductor digitiform, separated from embolus in ventral view ( Figs 16 , 21 ); atrium semicircular, slightly wider than long, with wide band-shaped anterior margin, ( Figs 18 , 23 ).

Description. Male (holotype): Total length 5.25; carapace 2.50 long, 1.90 wide; abdomen 2.75 long, 1.40 wide. Cephalothorax ( Fig. 13 ). Carapace brownish yellow, chelicerae reddish brown, promargin with three teeth, the median largest, retromargin with two subequal teeth; endites and labium reddish brown; sternum brownish yellow, with dense hairs. Eyes. In dorsal view, anterior eye row slightly recurved, posterior eye row slightly procurved; AME dark, remaining eyes light, surrounded by black pigment; eye diameters and interdistances: AME 0.13, ALE 0.15, PLE 0.15, PME 0.13, AME–AME 0.08, AME–ALE 0.05, PME–PME 0.25, PME–PLE 0.15; MOQL 0.38, MOQA 0.35, MOQP 0.53. Legs yellow; tibiae I and II with two pairs of ventral spines, metatarsi I and II with one pair of ventral spines; leg measurements: I 5.95 (1.75, 2.0, 1.60, 0.60), II 6.95 (1.90, 2.85, 1.40, 0.80), III 5.85 (1.65, 2.35, 1.20, 0.65), IV 8.70 (2.40, 3.30, 2.0, 1.0); leg formula: IV, II, I, III. Abdomen ( Fig. 13 ). Dorsum light yellow, with two pairs of muscular depressions; venter and spinnerets light yellow. Palp ( Figs 15–17 , 20–22 ). Femur and patella unmodified, without apophyses; ventral tibial apophysis short and blunt, retrolateral tibial apophysis dark, sclerotized, with cuspidal apex; cymbium almost as long as bulb; bulb elongate-oval, strongly bulged, posterior margin extending over patella, sperm duct indistinct in ventral view; conductor digitiform, membranous; embolus long, with wide base, upper half part filiform, extending above the top of cymbium.

Female (paratype): Total length 6.60; carapace 2.90 long, 2.0 wide; abdomen 3.70 long, 2.40 wide. Cephalothorax ( Fig. 14 ). Chelicerae promargin with four teeth, the third largest, retromargin with two subequal teeth ( Fig. 14 ). Eye diameters and interdistances: AME 0.15, ALE 0.18, PLE 0.15, PME 0.15, AME–AME 0.10, AME–ALE 0.03, PME–PME 0.30, PME–PLE 0.23; MOQL 0.38, MOQA 0.43, MOQP 0.58. Leg measurements: I 5.75 (1.70, 2.30, 1.10, 0.65), II 6.60 (2.0, 2.60, 1.25, 0.75), III 5.70 (1.75, 1.90, 1.45, 0.60), IV 7.88 (2.25, 2.80, 2.13, 0.70); leg formula: IV, II, I, III. Epigyne ( Figs 18–19 , 23–24 ). Atrium semicircular, located at anterior part of epigynal plate; two copulatory openings located posteriorly on atrium; copulatory ducts short, extending anteriorly; spermathecae tubular, long and sinuous; bursae ovoid, translucent.

Distribution. Presently known only from Yunnan, China.

Figures

FIGURES 13 – 19. Clubiona dactylina n. sp.: male holotype (13, 15 – 17) and female paratype (14, 18 – 19). 13 – 14 habitus, dorsal view; 15 palp, prolateral view; 16 same, ventral view; 17 same, retrolateral view; 18 epigyne, ventral view; 19 vulva, dorsal view. Scale bars: 0.5 mm (13 – 14), 0.1 mm (15 – 19).

FIGURES 20 – 24. Clubiona dactylina n. sp.: male holotype (20 – 22) and female paratype (23 – 24). 20 palp, prolateral view; 21 same, ventral view; 22 same, retrolateral view; 23 epigyne, ventral view; 24 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.