Pristidia cervicornuta, Yu & Zhang & Chen, 2017

Yu, Hao, Zhang, Jianshuang & Chen, Jian, 2017, Taxonomy of the genus Pristidia Deeleman-Reinhold, 2001 (Araneae: Clubionidae) in China, Zootaxa 4306 (3), pp. 411-418 : 413

Pristidia cervicornuta sp. nov.

Figs 1–8 , 17

Type material. Holotype, male (HBR-HDY-09-166) from Taiping Farm (18°48'12.46"N, 109°52'5.42"E, 380m), Mt. Diaoluo , Hainan Province, China, 6 October 2009, H. Yu & Z.Jin leg. ; Paratype, male (HBR-HDY-09-167), same data as holotype.

Etymology. The specific epithet is an adjective derived from the combination of two Latin words: cervus (deer) + cornutus (with antler), referring to the forked, antler-shaped retrolateral tibial apophysis.

Diagnosis. Males of Pristidia cervicornuta sp. nov. can be easily distinguished from those of other species of the P. prima group by the distally forked, antler-shaped retrolateral tibial apophysis and by the thick, semitransparent, thumb-shaped tegular apophysis ( Figs 3–8 ).

Description. Male (holotype): Total length 4.65; prosoma 2.02 long, 1.43 wide; opisthosoma 2.73 long, 1.02 wide. Prosoma ( Figs 1, 2 ) long, oval, pars cephalica distinctly narrowed, widest between coxae II and III, in profile slightly higher just behind longitudinal fovea, gradually sloping towards pars cephalica; integument smooth, clothed with numerous short fine hairs. Carapace pale brown, slightly darker in front, without distinct colour pattern. Chelicerae protruding and dark brown, with three promarginal and two retromarginal teeth. Labium and endites brown, longer than wide. Sternum yellowish. Eyes: AER slightly recurved, PER slightly wider than AER and procurved in dorsal view. AME dark, other eyes light, with black rings. Eye sizes and interdistances: AME 0.10, ALE 0.12, PME 0.10, PLE 0.11, AME–AME 0.09, AME–ALE 0.07, PME–PME 0.24, PME–PLE 0.13, MOQL 0.30, MOQA 0.28, MOQP 0.44. Legs yellowish, without distinct colour markings. Leg formula: IV, III, I, II; leg measurements: I 6.85 (2.01, 3.24, 1.12, 0.48), II 5.40 (1.67, 1.73, 1.47, 0.53), III 7.90 (2.68, 2.97, 1.52, 0.73), IV 9.25 (2.77, 3.23, 2.46, 0.79). Opisthosoma ( Figs 1, 2 ) lanceolate, dorsally yellowish brown with long-oval light brown patch, reaching posterior half; with conspicuous anterior hairs tufts; venter yellowish white, with an orange and irregular patch on the epigaster. Spinnerets and anal tubercle elongated. Palp ( Figs 3–8 ): RTA small, heavily sclerotized, with a forked tip in retrolateral view; cymbium longer than wide, basal flange visible in both ventral and retrolateral view; genital bulb elongated and with a relatively flat tegulum, subtegulum located in prolateral side of tegulum, sperm duct distinctive and U-shaped; embolus originating from prolateral side of tegulum, curved behind TA, its tip extending to apex of cymbium; TA distinctly thick, semi-transparent. Female: unknown.

Distribution. Presently known only from the type locality, Mt. Diaoluo, Hainan, China ( Fig. 17 ).

Figures

FIGURE 17. Records of Pristidia species in China: circle, P. cervicornuta sp. nov.; squares, P. ramosa Yu, Sun & Zhang, 2012.

FIGURES 1 – 5. Pristidia cervicornuta sp. nov., male holotype: 1 habitus, dorsal view; 2 same, ventral view; 3 left palp, prolateral view, 4 same, ventral view; 5 same, retrolateral view. Abbreviatures: CF, cymbial flange; E, embolus; RTA, retrolateral tibial apophysis; ST, subtegulum; T, tegulum; TA, tegular apophysis. Scale bars = 1 mm (1 – 2); 0.5 mm (3 – 5).

FIGURES 6 – 8. Pristidia cervicornuta sp. nov., male holotype: 6 left palp, prolateral view; 7 same, ventral view; 8 same, retrolateral view. Abbreviatures: CF, cymbial flange; E, embolus; RTA, retrolateral tibial apophysis; ST, subtegulum; T, tegulum; TA, tegular apophysis. Scale bar = 0.5 mm.