Clubiona subasrevida, Yu & Li, 2019

Yu, Hao & Li, Shuqiang, 2019, On further species of the spider genus Clubiona Latreille, 1804 (Araneae, Clubionidae) from Xishuangbanna Rainforest, southwestern China, Zootaxa 4679 (2), pp. 201-230 : 221-226

Clubiona subasrevida sp. nov.

Figs 17–18

Type material. Holotype: ♂ ( IZCAS Ar 34717), CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , Secondary tropical montane evergreen broad-leaved forest (N21º57.809′, E101º12.173′, 888 m), 4 August 2007, leg. G. Zheng (Fogging-CBIII) . Paratypes: CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve : 1♀ ( IZCAS Ar 34718), same data as holotype ; 1 ♂ ( IZCAS Ar 34719), Secondary tropical montane evergreen broad-leaved forest (N21º54.813′, E101º12.634′, 876 m), 5 August 2007, leg. G. Zheng (Fogging-CBIV) .

Etymology. The specific name is a Latin substantive referring to its similarity to Clubiona asrevida Ono, 1992 , being a combination of the preposition sub (near) and the epithet of that species.

Diagnosis. Males of Clubiona subasrevida sp. nov. resemble those of C. asrevida ( Ono 1992: 124, figs 5–7) in having similarly shaped bulb with sinuate sperm duct, and triangular retrolateral tibial apophysis, but differ by: (1) embolus with a sub-basal torsion, placed distally in relation to tegular hump ( Figs 17 A–B, D) (embolus aligned clockwise along the tegular distal margin in C. asrevida ); (2) tip of embolus extending approximately two-thirds length of tegulum ( Figs 17B , D–E) (relatively shorter tip in C. asrevida ). Females are similar to those of C. asrevida in the general shape of vulva ( Ono 1994: 81, figs 19–22), but can be recognized by the contiguous copulatory openings ( Figs 18 A–B) (copulatory ducts separated in C. asrevida ).

Description. Male (holotype): Total length 2.52; prosoma 1.14 long, 1.01 wide; opisthosoma 1.42 long, 0.83 wide. Prosoma ( Figs 18 E–F), oval, with relatively broad ocular area, widest between coxae II and III, in profile slightly raised, highest just in front fovea; integument smooth, covered with numerous fine hairs. Carapace orange, pars cephalica darker in ocular area, without distinct colour pattern. Chelicerae protruding and coloured as ocular area, with seven promarginal and five retromarginal teeth. Labium and endites colored as carapace, longer than wide. Sternum light yellow. Eyes: in dorsal view, anterior eye row slightly recurved, posterior eye row slightly procurved, PER wider than AER. AME dark, other eyes light; with black rings. Eye sizes and interdistances: AME 0.11, ALE 0.09, PME 0.09, PLE 0.10, AME–AME 0.11, AME–ALE 0.04, PME–PME 0.27, PME–PLE 0.04, MOQL 0.11, MOQA 0.20, MOQP 0.36. Legs yellowish, without distinct color markings. Leg formula: IV, I, II, III; leg measurements: I 2.73 (0.77, 1.18, 0.58, 0.21), II 2.24 (0.70, 0.77, 0.50, 0.27), III 1.87 (0.45, 0.76, 0.45, 0.21), IV 3.03 (0.90, 1.06, 0.77, 0.30). Opisthosoma ( Figs 18 E–F) oval, dorsally yellowish-white with two pairs of muscular depressions; all spinnerets without distinct color marking. Palp ( Figs 17 A–E): tibia short, with single retrolateral apophysis, RTA broad, flat and triangular, with a sharp tip; genital bulb elongated, sperm duct sinuous; tegular hump represented by a flange; embolic base smooth, represented by a large sclerite, inserted at approximately 11 o’clock of tegulum; embolus distinctly long, flagelliform, slender, bent 90 degrees ventrally, forming a loop-shaped torsion; embolic tip stretched proximally on groovelike conductor, extending basad more than two-thirds length of tegulum; conductor area relatively large, for approximately two-thirds the length of tegulum.

Female (paratype IZCAS Ar 34718): Total length 2.81; prosoma 1.27 long, 0.96 wide; opisthosoma 1.42 long, 0.92 wide. Not strikingly different from males but slightly lighter in color ( Figs 18 G–H). Eye sizes and interdistances: AME 0.10, ALE 0.07, PME 0.07, PLE 0.06, AME–AME 0.10, AME–ALE 0.03, PME–PME 0.22, PME–PLE 0.04, MOQL 0.08, MOQA 0.18, MOQP 0.29. Leg formula: IV, I, II, III; leg measurements: I 2.70 (0.77, 0.98, 0.65, 0.31), II 2.23 (0.60, 0.97, 0.40, 0.25), III 1.82 (0.49, 0.83, 0.30, 0.20), IV 2.25 (0.36, 0.52, 0.80, 0.57). Epigyne ( Figs 18 A–D): Epigynal plate disc-shaped, distinctly wider than long, posterior margin heavily sclerotized; spermathecae and copulatory ducts are prominently through epigynal plate in ventral view; two copulatory openings large and conjoined, located at posterior portion of epigynal plate; hyaline copulatory ducts thick and straight, close together, extending above anterior level of spermathecae, and then oblique descending ventrally, connected laterally to bursae; spermathecae sub-globular, connected to digitiform spermathecal heads; bursae globular, situated anteriorly, much smaller than spermathecae; fertilization ducts acicular, membranous, located on dorsal surface of spermathecae.

Distribution. Presently known only from the type locality.

Figures

FIGURE 17. Clubiona subasrevida 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; TH, tegular hump. Scale bars: 0.10 mm (A–B, C–E in the same scale).

FIGURE 18. Clubiona subasrevida 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; SP, spermatheca. Scale bars: 0.10 mm (A–D in the same scale); 1 mm (E–F, G–H in the same scale).