Scotospilus longus, Zhang, Zhi-Sheng, Li, Shuqiang & Pham, Dinh-Sac, 2013

Zhang, Zhi-Sheng, Li, Shuqiang & Pham, Dinh-Sac, 2013, First description of comb-tailed spiders (Araneae: Hahniidae) from Vietnam, Zootaxa 3613 (4), pp. 343-356 : 351-352

Scotospilus longus sp. nov.

Figs 8A–E , 9A–G , 10A–F

Type material. Holotype male, VIETNAM, VINH PHUC PROVINCE, Tam Dao National Park, disturbed forest, sieving, 21°31.251ʹN, 105°33.491ʹE, 693m, 13.VI.2007. Paratypes (8 females): 1 female, same data as holotype; 1 female, same data as holotype but 21°29.029ʹN, 105°37.192ʹE, 794m, sieving, 13.VI.2007; 1 female, same data as holotype but 21°31.251ʹN, 105°33.491ʹE, 693m, 18.VII.2007; 1 female, same data as preceding specimen but 19.IX.2007; 2 females, same area as holotype, but natural forest, 21°29.230ʹN, 105°37.203ʹE, 870m, 19.X.2007; 1 female, same place as holotype, natural forest, 21°29.428ʹN, 105°37.008ʹE, 1077m, sieving, 12.XI.2007; 1 female, same data as preceding specimen, but 21°29.428ʹN, 105°37.208ʹE, 1077m, sieving, 11.III.2008.

Etymology. The specific name is taken from the Latin word “ longus ”, meaning long and referring to the long RTA of the male palp, adjective.

Diagnosis. The new species is similar to S. nelsonensis (Forster, 1970: 149, figs 416–417) and S. planus (Forster, 1970: 147, figs 413–415) from New Zealand in having similar shape of patellar apophysis, the long and proximally extended RTA, the circular embolus; the relatively short copulatory ducts and spherical spermathecae with narrow distance from each other, but differs from the others by the absence of AME, the curved apex of the RTA ( Figs 8A , 9A, 9E ); a single copulatory opening centrally, the wide copulatory ducts and the absence of subspermathecae ( Figs 8D–E , 10D–F ).

Description. Male holotype ( Figs 9A–C ): Total length 0.92. Prosoma 0.52 long, 0.43 wide; opisthosoma 0.48 long, 0.38 wide. AME absent. Eye sizes and interdistances: ALE 0.05, PME 0.04, PLE 0.06; ALE–ALE 0.02, PME–PME 0.03, PME–PLE 0.01, ALE–PLE 0.01. Clypeus height (from the anterior margin of ALE to the margin of clypeus) 0.02. Leg measurements: I 1.40 (0.43, 0.48, 0.27, 0.22); II 1.22 (0.37, 0.40, 0.24, 0.21); III 0.92 (0.30, 0.26, 0.19, 0.17); IV 1.27 (0.38, 0.41, 0.28, 0.20). Leg formula: 1423. Chelicerae with 3 promarginal and 4 retromarginal teeth.

Male palp ( Figs 8A–C , 9E–G ). Patellar apophysis tuberculate, with a tip pointing retrolaterally. RTA extremely long, extending posteriorly, exceeding the base of patella, with a prolaterally curved apex. Embolus retroproximally orignated, curved along the margin of genital bulb, its end staying in the cymbial furrow near the embolic base. Median apophysis absent. Cymbial furrow longer than half of the cymbium and relatively shallow. One of female paratypes ( Figs 9D , 10A–C ) total length 1.27. Prosoma 0.56 long, 0.44 wide; opisthosoma 0.77 long, 0.63 wide. Eye sizes and interdistances: ALE 0.05, PME 0.04, PLE 0.04; ALE–ALE 0.02, PME–PME 0.03, PME–PLE 0.01, ALE–PLE 0.01. Clypeus height (from the anterior margin of ALE to the margin of clypeus) 0.02. Leg measurements: I 1.19 (0.36, 0.40, 0.24, 0.19); II 1.07 (0.33, 0.35, 0.22, 0.17); III 0.98 (0.34, 0.31, 0.21, 0.13); IV 1.09 (0.38, 0.39, 0.25, 0.17). Chelicerae with 5–6 retromarginal teeth. Other characters as similar to the male holotype.

Epigyne ( Figs 8D–E , 10D–F ) with a combined copulatory opening centrally. Copulatory ducts relatively wide and short. Subspermathecae indistinct. Spermathecae rounded and posteriorly located, separated by half of their diameter.

Distribution. Vietnam (Vinh Phuc).

Figures

FIGURES 8 A – E. Scotospilus longus sp. nov., holotype male (A – C) and female paratype (D – E). A. Left palp, ventral view; B. Same, retrolateral view; C. Same, dorsal view; D. Epigyne, ventral view; E. Vulva, dorsal view. At = atrium; CD = copulatory duct; CF = cymbial furrow; Em = embolus; FD = fertilization duct; MA = median apophysis; PA = patellar apophysis; RTA = retrolateral tibial apophysis; Sp = spermatheca.

FIGURES 9 A – G. Scotospilus longus sp. nov., holotype male (A – C, E – G) and female paratype (D). A. Male habitus, dorsal view; B. Same, ventral view; C. Male eyes and chelicerae, front view; D. Female chelicerae, ventral view; E. Left male palp, ventral view; F. Same, retrolateral view; G. Same, dorsal view.

FIGURES 10 A – F. Scotospilus longus sp. nov., female paratypes (A – D based on the same paratype, E – F based on another paratype). A. Female habitus, dorsal view; B. Same, ventral view; C. Eye region, dorsal view; D, E. Epigyne, ventral view; F. Vulva, dorsal view.