Clubiona subkuu, 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 : 164-167

Clubiona subkuu sp. nov.

Figs 9–10

Type material. Holotype: 6 (IZCAS Ar 34604), CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , Lvshilin Forest Park , Limestone tropical seasonal rain forest (N21°54.555', E101°16.860', 610 m), 29 November 2009, leg. G. Tang and Z.Y. Yao (Tang-Yao_No.33). Paratypes: CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , 7♂, 5♀ ( IZCAS Ar 34605– 34616), same data as holotype ; 6♂, 2♀ ( IZCAS Ar 34617–34624), G213 roadside, lowevergreen forest (N21°53.794', E101°17.152', 594 m), 27 November 2009, leg. G. Tang and Z.Y. Yao (Tang-Yao_No.29) .

Etymology. The specific name is a Latin substantive referring to its similarity to Clubiona kuu Jäger & Dankittipakul, 2010 , being a combination of the preposition sub (near) and the epithet of that species.

Diagnosis. Males of Clubiona subkuu sp. nov. resemble those of C. kuu ( Jäger & Dankittipakul 2010: 35, figs 46–51, 57–60, 72) in having similarly shaped embolus, tegular hump and retrolateral tibial apophysis with a spinelike tip, but differ by: (1) base of retrolateral tibial apophysis point dorsally ( Fig. 9B ) (point ventrally in C. kuu ); (2) distinctly prominent tegular hump ( Figs 9 C–E) (relatively smaller in C. kuu ); (3) number and arrangement of cheliceral teeth, namely four anterior with the distal one separated, three posterior teeth in a straight row (five anterior and three posterior teeth with the distal two anterior and the distal posterior separated in C. kuu ). The females are similar to those of C. bipinnata Yu, Zhang & Chen, 2017 ( Yu et al. 2017a: 692, figs 1–5), C. damirkovaci Deeleman-Reinhold, 2001 ( Deeleman-Reinhold 2001: 107, figs 12–23), C. ericius Chrysanthus, 1967 ( Chrysanthus 1967: 409, figs 24–25), and C. oceanica Ono, 2011 ( Ono 2011: 22, figs 25–27) by the general shape of vulva and epigynal plate with two transverse ridges, but can be recognized by the more or less blade-shaped ridges ( Figs 10 A–B) (feather-shaped in C. bipinnata and C. oceanica , comma-shaped in C. damirkovaci and C. ericius ).

Description. Male (holotype): Total length 3.80; prosoma 1.67 long, 1.30 wide; opisthosoma 2.25 long, 1.15 wide. Prosoma ( Figs 10 E–F), ovoid in dorsal view, ocular region distinctly narrowed, widest between coxae II and III; in profile, slightly higher between ocular area and longitudinal fovea, gradually sloping towards pars cephalica; integument smooth, clothed with short fine hairs. Carapace red-brown, without distinct color pattern; fovea dark. Chelicerae protruding and coloured as carapace, with four promarginal and three retromarginal teeth. Labium and endites orange, longer than wide. Sternum yellowish. 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 0.06, ALE 0.07, PME 0.06, PLE 0.07, AME–AME 0.04, AME–ALE 0.03, PME–PME 0.16, PME–PLE 0.13, MOQL 0.25, MOQA 0.17, MOQP 0.34. Legs yellowish, without distinct color markings. Leg formula: IV, II, I, III; leg measurements: I 3.11 (0.96, 0.41, 0.68, 0.75, 0.31), II 3.39 (0.98, 0.50, 0.92, 0.61, 0.38), III 2.95 (0.86, 0.34, 0.72, 0.73, 0.30), IV 4.53 (1.32, 0.44, 1.06, 1.26, 0.45). Opisthosoma ( Figs 10 E–F) elongate-oval, dorsally yellowish-white with a longitudinal light orange heartmark, extending to one-third length of abdomen; with a pairs of muscular depressions; with conspicuous anterior hair tufts; venter and spinnerets light yellow. Palp ( Figs 9 A–E): tibia short, with single retrolateral apophysis, RTA small, with thumb-like base and spine-like tip; genital bulb elongated, tegulum relatively flat, sperm duct distinctive, U-shaped; tegular hump distinctly prominent; embolus arising prolatero-distally from tegulum, basal portion wide, gradually tapering toward filiform apex.

Female (paratype IZCAS Ar 34605): Total length 3.71; prosoma 1.63 long, 1.35 wide; opisthosoma 2.03 long, 1.24 wide. Not strikingly different from males but lighter in color ( Figs 10 G–H). Eye sizes and interdistances: AME 0.07, ALE 0.07, PME 0.07, PLE 0.08, AME–AME 0.05, AME–ALE 0.03, PME–PME 0.19, PME–PLE 0.09, MOQL 0.28, MOQA 0.28, MOQP 0.42. Legs yellowish, without distinct color markings. Leg formula: IV, II, I, III; leg measurements: I 2.87 (0.84, 0.44, 0.73, 0.52, 0.34), II 3.13 (0.95, 0.46, 0.82, 0.59, 0.31), III 2.63 (0.82, 0.26, 0.62, 0.65, 0.28), IV 4.44 (1.30, 0.53, 1.01, 1.17, 0.43). Epigyne ( Figs 10 A–D): Epigynal plate distinctly wider than long, posterior margin not rebordered; atrium absent; spermathecae and copulatory ducts well visible through tegument in ventral view; two copulatory openings small, contiguous, situated at the middle of epigyne near epigastric furrow, hidden in ventral view by two transverse ridges; ridge represented by blade-shaped sclerite; copulatory ducts gently curved toward bursae; both spermathecae and bursae globular, the former anteriad, smaller than the latter; bursae translucent with smooth surface; fertilization ducts acicular, short, located on dorsal-lateral surface of spermathecae.

Distribution. Presently known only from the type locality.

Figures

FIGURE 9. Clubiona subkuu 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: E, embolus; EB, embolic base; RTA, retrolateral tibial apophysis; TH, tegular hump. Scale bars: 0.10 mm (A–B, C–E in the same scale).

FIGURE 10. Clubiona subkuu sp. nov., male holotype (E–F) and female paratype (A–D, G–H): A–B, epigyne, ventral view (A uncleared; B cleared); C–D, vulva, dorsal view (C cleared; D cleared and embedded in Arabic gum); E–H, habitus (E, G dorsal view; F lateral view; H ventral view). Abbreviatures: BS, bursa; CD, copulatory duct; CO, copulatory opening; FD, fertilization duct; R, epigynal ridge; SP, spermatheca. Scale bars: 0.10 mm (A–D in the same scale); 1 mm (E–F, G–H in the same scale).