Otacilia microstoma, Wang, Lu-Yu, Chen, Hui-Ming, Zhou, Ke-Xin, Zhang, Feng & Zhang, Zhi-Sheng, 2015

Wang, Lu-Yu, Chen, Hui-Ming, Zhou, Ke-Xin, Zhang, Feng & Zhang, Zhi-Sheng, 2015, Diversity of spiders in Fanjing Mountain Nature Reserve, Guizhou, China, I: Six new species of Phrurolithidae (Araneae), Zootaxa 4012 (3), pp. 447-464 : 449-450

Otacilia microstoma sp. nov.

Figures 1 A–E, 2A–G

Type material. Holotype ♂, China, Guizhou Province, Fanjing Mountain Nature Reserve: Mianxuling, 27°54.54′N, 108°39.83′E, elev. 1974 m, 30 September 2013, L.Y. Wang, D. Wang and X.K. Jiang leg. Paratypes: 4 ♂ and 4 ♀, with same data as holotype.

Etymology. The specific epithet is a combination of ‘ micro ’ and ‘ stoma ’, meaning ‘small opening’, with reference to the presence of a pair of small copulatory openings; noun.

Diagnosis. The new species is similar to O. simianshan Zhou, Wang & Zhang, 2013 ( Zhou et al. 2013: 1, figs 2A–E, 3A–G), but differs from the latter in the relatively sharp RTA with a small, finger-like basal process of the male palp ( Figs 1 A–C, 2C–E); females are characterised by the two tiny copulatory openings and the duct-like spermathecae of the epigyne ( Figs 1 D–E, 2F–G).

Description. Male. Total length 3.35–4.26. Holotype ( Fig. 2 A) total length 3.63. Prosoma 1.86 long, 1.58 wide; opisthosoma 1.79 long, 1.28 wide. Dorsum of prosoma yellow brown. Eye sizes and interdistances: AME 0.10, ALE 0.12, PME 0.10, PLE 0.11; AME–AME 0.05, AME–ALE 0.01, PME–PME0.13, PME–PLE 0.06, ALE–PLE 0.11. MOA 0.27 long, front width 0.23, back width 0.35. Clypeus height 0.22. Chelicerae stout, yellow brown, with three promarginal and six 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 four prolateral spines; tibia I with six pairs of ventral spines; metatarsus I with four pairs of ventral spines. Femur II with two prolateral spines; tibia II with six pairs of ventral spines; metatarsus II with four pairs of ventral spines. Leg measurements: I 6.31 (1.69, 2.36, 1.49, 0.77); II 5.52 (1.48, 1.95, 1.29, 0.80); III 4.60 (1.20, 1.49, 1.16, 0.75); IV 6.38 (1.88, 2.16, 1.59, 0.75). Leg formula: 4123. Opisthosoma oval. Dorsum yellow brown with black brown markings and six bright chevron-shaped markings. Venter yellowish brown.

Male palp ( Figs 1 A–C, 2C–E). Femur with blunt ventral apophysis. RTA broad, with relatively sharp apex extending along the cymbium retrolaterally; small, finger-like process basally, whose tip is covered by RTA in retrolateral view. Embolus thin, needle-like. Sperm duct strongly sclerotized. Tegular process antero-retrolaterally located, small and blunt. Tegulum widest in middle.

Female. Total length 3.27–4.29. One paratype ( Fig. 2 B) total length 4.23. Prosoma 1.93 long, 1.70 wide; opisthosoma 2.39 long, 1.46 wide. Body colour and markings bolder than male. Eye sizes and interdistances: AME 0.09, ALE 0.11, PME 0.10, PLE 0.11; AME–AME 0.06, AME–ALE 0.02, PME–PME 0.12, PME–PLE 0.06, ALE–PLE 0.09. MOA 0.30 long, front width 0.24, back width 0.34. Clypeus height 0.18. Leg measurements: I 6.58 (1.65, 2.58, 1.62, 0.73); II 5.62 (1.52, 1.96, 1.38, 0.76); III 4.93 (1.26, 1.61, 1.28, 0.78); IV 7.39 (2.01, 2.38, 1.98, 1.02). Leg formula: 4123. Other characters as for male holotype.

Epigyne ( Figs 1 D–E, 2F–G) with copulatory openings located centrally, tiny and pore-like. Copulatory ducts with pair of large, transparent bursae anteriorly. Spermathecae curved, with almost the same diameter as copulatory ducts. Fertilization ducts originating anteriorly.

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

Figures

FIGURE 1. Otacilia microstoma sp. nov., holotype male (A – C) and paratype female (D – E) from Mianxuling. A. Left male palp, prolateral view; B. Same, ventral view; C. Same, retrolateral view; D. Epigyne, ventral view; E. Vulva, dorsal view. Abbreviations: B, bursae; CD, copulatory duct; CO, copulatory opening; E, embolus; FA, femoral apophysis; FD, fertilization duct; RTA, retrolateral tibial apophysis; SD, sperm duct; SP, spermathecae; TP, tegular process.

FIGURE 2. Otacilia microstoma sp. nov., holotype male (A, C – E) and paratype female (B, F – G) from Mianxuling. A. Male habitus, dorsal view; B. Female habitus, dorsal view; C. Left male palp, prolateral view. D. Same, ventral view. E. Same, retrolateral view. F. Epigyne, ventral view; G. Vulva, dorsal view.

FIGURE 13. The location of Fanjing Mountain Nature Reserve in China.