Otacilia songi Wang, Chen, Zhou, Zhang & Zhang, 2015, sp. nov.

Otacilia songi sp. nov.

Figures 3 A–E, 4A–G

Type material. Holotype ♂, China, Guizhou Province, Fanjing Mountain Nature Reserve: Jinding, 27°54.54′N, 108°41.88′E, elev. 2289 m, 23 July 2013, L.Y. Wang, T. Lu and X.K. Jiang leg. Paratypes (3 ♀ ): 1 ♀, with same data as holotype; 2 ♀, Jinding, 27°54.49′N, 108°41.86′E, elev. 2214 m, 29 September 2013, L.Y. Wang, D. Wang and X.K. Jiang leg.

Etymology. The specific epithet is taken from the family name of Prof. Daxiang Song, in honour of his great contribution to Chinese arachnology; noun.

Diagnosis. The new species is similar to O. foveata (Song, 1990) (Hu & Zhang 2011: 65, figs 15 – 20), but differs from the latter by the single, wide RTA and the relatively short embolus of the male palp (Figs 3 A–C, 4C– E); females are distinguished by the wide median plate and the large, closely positioned bursae of the epigyne (Figs 5 D–E, 4F–G).

Description. Male. Holotype (Fig. 4 A) total length 3.94. Prosoma 1.90 long, 1.54 wide; opisthosoma 1.96 long, 1.25 wide. Dorsum of prosoma black brown. Eye sizes and interdistances: AME 0.08, ALE 0.11, PME 0.10, PLE 0.11; AME–AME 0.06, AME–ALE 0.03, PME–PME0.11, PME–PLE 0.08, ALE–PLE 0.13. MOA 0.30 long, front width 0.23, back width 0.33. Clypeus height 0.17. Chelicerae stout, yellow brown with three promarginal and four retromarginal teeth. Gnathocoxae yellow brown, longer than wide. Labium yellow brown, as long as wide. Sternum yellow brown, heart-shaped with sparse brown hairs. Legs yellow brown, femur with one dorsal spine.

Femur I with three prolateral spines; tibia I with seven pairs of ventral spines; metatarsus I with four pairs of ventral spines. Femur II with two prolateral spines; tibia II with seven pairs of ventral spines; metatarsus II with four pairs of ventral spines. Leg measurements: I 6.62 (1.70, 2.49, 1.63, 0.80); II 5.71 (1.50, 2.03, 1.36, 0.82); III 4.79 (1.33, 1.49, 1.28, 0.69); IV 7.62 (2.05, 2.36, 2.11, 1.10). Leg formula: 4123. Opisthosoma oval. Dorsum yellow brown with black brown markings and six bright chevron-like markings. Venter yellow brown.

Male palp (Figs 3 A–C, 4C–E). Femur with rounded ventral apophysis with depression retrolaterally. RTA with broad base and finger-like tip. Embolus short, hook-like. Sperm duct obviously sclerotized. Tegulum widest in middle, extending proximally, exceeding cymbial margin retrolaterally at base. Tegular process membranous, located near embolic base.

Female total length 3.94–4.51. One paratype (with same data as holotype, Fig. 4 B) total length 4.49. Prosoma 2.11 long, 1.78 wide; opisthosoma 2.17 long, 1.76 wide. Eye sizes and interdistances: AME 0.09, ALE 0.12, PME 0.10, PLE 0.11; AME–AME 0.09, AME–ALE 0.03, PME–PME 0.16, PME–PLE 0.10, ALE–PLE 0.16. MOA 0.32 long, front width 0.26, back width 0.38. Clypeus height 0.17. Leg measurements: I 7.61 (2.10, 2.82, 1.83, 0.86); II 6.47 (1.80, 2.37, 1.50, 0.80); III 5.64 (1.50, 1.78, 1.45, 0.91); IV 8.25 (2.30, 2.54, 2.35, 1.06). Leg formula: 4123. Other characters as for male holotype.

Epigyne (Figs 3 D–E, 4F–G) with wide but indistinct median plate. Copulatory openings small, located anteriorly, widely separated. Copulatory ducts with a pair of transparent bursae. Spermathecae club-shaped, connecting with fertilization ducts anteriorly.

Distribution. Known only from the type locality, Guizhou, China (Fig. 13).