Clubiona subrama, Yu & Li, 2019

Yu, Hao & Li, Shuqiang, 2019, Eight new species of the genus Clubiona Latreille, 1804 from Xishuangbanna Rainforest, southwestern China (Araneae, Clubionidae), Zootaxa 4545 (2), pp. 151-178 : 153-158

Clubiona subrama sp. nov.

Figs 3–4

Type material. Holotype: 6 (IZCAS Ar 34524), CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , Lvshilin Forest Park , Limestone tropical seasonal rain forest (N21°54.705', E101°16.898', 656 m), 13 November 2009, leg. G. Tang and Z.Y. Yao (Tang-Yao_No.4). Paratypes: CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , 7♂, 4♀ ( IZCAS Ar 34525– 34535), same data as holotype ; 7♂, 5♀ ( IZCAS Ar 34536–34547), Lvshilin Forest Park, Limestone tropical seasonal rain forest (N21°54.600', E101°17.084', 640 m), 17 November 2009, leg. G. Tang and Z.Y. Yao (Tang- Yao_No.12) .

Etymology. The specific name is a Latin substantive referring to its similarity to Clubiona rama Dankittipakul & Singtripop, 2008 , being a combination of the preposition sub (near) and the epithet of that species.

Diagnosis. Males of Clubiona subrama sp. nov. resemble those of C. rama Dankittipakul & Singtripop, 2008 ( Dankittipakul & Singtripop 2008: figs 18–20) in having similarly shaped conductor, filiform embolus and strongly prolapsed tegulum, but differ by: (1) retrolateral tibial apophysis with sharp apex ( Figs 3 A–B) (apically indented in C. rama ); (2) ventral tibial apophysis with blunt tip ( Fig. 3B ) (relatively sharp tip in C. rama ); (3) sperm duct indistinct in ventral view ( Fig. 3D ). Females of these two species are very similar and almost indistinguishable, but they differ in the number of promarginal teeth on chelicerae, namely seven in C. subrama , but three in C. rama .

Description. Male (holotype): Total length 7.54; prosoma 3.43 long, 2.06 wide; opisthosoma 4.01 long, 2.12 wide. Prosoma ( Figs 4 D–E) pyriform, ocular region distinctly narrowed, widest between coxae II and III; in profile highest just behind longitudinal fovea; integument smooth, clothed with short fine hairs. Carapace dark brown, without distinct color pattern; fovea dark. Chelicerae protruding and coloured as carapace, with four promarginal and two retromarginal teeth. Labium and endites dark brown, longer than wide. Sternum brown. Eyes: AER slightly recurved, PER wider than AER and slightly procurved in dorsal view. AME dark, other eyes light; with black rings. Eye sizes and interdistances: AME 0.10, ALE 0.12, PME 0.16, PLE 0.15, AME–AME 0.09, AME– ALE 0.08, PME–PME 0.24, PME–PLE 0.15, MOQL 0.40, MOQA 0.34, MOQP 0.52. Legs brown, without distinct color markings. Leg formula: II, IV, I, III; leg measurements: I 7.43 (1.75, 0.99, 2.29, 1.66, 0.75), II 8.77 (2.40, 0.95, 2.94, 1.74, 0.74), III 7.19 (1.69, 0.70, 1.69, 2.53, 0.59), IV 7.48 (2.09, 0.94, 2.24, 1.43, 0.72). Opisthosoma ( Figs 4 D–E) elongate-oval, brown, with conspicuous anterior hair tufts, dorsum with two pairs of muscular depressions; venter gray. Palp ( Figs 3 A–E): Tibia short, with two apophyses, VTA large, tip blunt, trapezoidal; RTA dark, sharp and strong, triangular; bulb elongate-oval, strongly bulged and prolapsed, sperm duct indistinct in ventral view; embolus distinctly long, filiform, slender, originating from prolateral side of tegulum, tip extending above apex of cymbium; conductor membranous and dagger-shaped, long, with sharp tip.

Female (paratype IZCAS Ar 34525): Total length 8.03; prosoma 3.56 long, 2.22 wide; opisthosoma 4.38 long, 2.53 wide. General color lighter than male ( Figs 4 F–G). Eye sizes and interdistances: AME 0.12, ALE 0.18, PME 0.12, PLE 0.16, AME–AME 0.12, AME–ALE 0.07, PME–PME 0.28, PME–PLE 0.20, MOQL 0.51, MOQA 0.45, MOQP 0.55. Legs yellowish, without distinct color markings. Leg formula: IV, II, I, III; leg measurements: I 5.94 (1.56, 1.01, 1.67, 0.99, 0.71), II 6.80 (1.01, 1.82, 1.90, 1.44, 0.63), III 5.22 (0.99, 0.97, 1.27, 1.51, 0.49), IV 7.91 (1.41, 1.15, 1.92, 2.62, 0.81). Epigyne ( Figs 4 A–C): Epigynal plate distinctly wider than long, margin not rebordered; atrium anteriorly cordiform, posteriorly elongate-narrowed; copulatory openings small, located on lateral part of atrium, leading to parallel copulatory ducts directed posteriorly then ascending obliquely, and then descending posteriorly to connect with spermathecae; spermathecae tubular, long and sinuous, strongly twisty; fertilization ducts short and curved, acicular; bursae ovoid, relatively large, semitransparent.

Distribution. Presently known only from the type locality.

Figures

FIGURE 3. Clubiona subrama sp. nov., male holotype: A–B, left palp (A prolateral view; B retrolateral view); C–E, left palpal bulb (C prolateral view; D ventral view; E retrolateral view). Abbreviatures: C, conductor; E, embolus; EB, embolic base; RTA, retrolateral tibial apophysis; VTA, ventral tibial apophysis. Scale bars: 0.50 mm (A–B, C–E in the same scale).

FIGURE 4. Clubiona subrama sp. nov., male holotype (D–E) and female paratype (A–C, F–G): A–B, epigyne, ventral view (A uncleared; B cleared); C, vulva, cleared, dorsal view; D–G, habitus (D, F dorsal view; E lateral view; G ventral view). Abbreviatures: A, epigynal atrium; BS, bursa; CD, copulatory duct; CO, copulatory opening; FD, fertilization duct; SH, spermathecal head; SP, spermatheca. Scale bars: 0.20 mm (A–C in the same scale); 2 mm (D–E, F–G in the same scale).