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

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Pristidia cervicornuta

sp. nov.

Pristidia cervicornuta   sp. nov.

Figs 1–8 View FIGURES 1 – 5 View FIGURES 6 – 8 , 17 View FIGURE 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. GoogleMaps   ; Paratype, male (HBR-HDY-09-167), same data as holotype. GoogleMaps  

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 View FIGURES 1 – 5 View FIGURES 6 – 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 View FIGURES 1 – 5 ) 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 View FIGURES 1 – 5 ) 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 View FIGURES 1 – 5 View FIGURES 6 – 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 View FIGURE 17 ).