Otacilia tingwei sp. nov.

(Figs 16−21)

Type material. China, Guangxi Zhuang Autonomous Region, Nanning City, Shanglin County, Damingshan National Natural Reserve. Holotype: ♁: Ganlan Station, 23°34'15.38"N, 108°25'16.28"E, 485 m, 7.11.2018 . Paratypes: 5 ♁, 5♀, with same data as holotype; 1 ♀, same locality, Sanbao Station, Chaoyang, 23°31'36.48"N, 108°22'11.64"E, 915 m, 2.11.2018 ; 7 ♁, 4 ♀, same locality, Hanjiang Station, 23°32'23.27"N, 108°21'5.03"E, 370 m, 4.11.2018.

Etymology. The specific name is taken from the first name of Mr. Tingwei Meng, who guided us to collect the specimens around Ganlan Station in Damingshan National Natural Reserve; noun in apposition.

Diagnosis. The male of this new species is similar to that of Otacilia zhouyun (Wang, Chen, Zhou, Zhang & Zhang, 2015) (see Wang et al. 2015: 457, figs 11a–c, 12c–e) in having a spine-like embolus (E) strongly bending toward anterolateral part of cymbium, and ring-shaped sperm duct (SD) in prolateral view, but differs from it by the syringe-shaped retrolateral tibial apophysis (RTA) (vs. bifurcate, dorsal branch with some small thorns), the bifurcate dorsal tibial apophysis (DTA) (vs. without branch) and the relative long embolus directed retrolaterally (vs. short, directed anteriorly) (Figs 17, 19a–c, 20). The epigyne (Figs 18C, D, 19D, E) resemble that of O. subannula (Fu, Chen & Zhang, 2016) (see Fu et al. 2016: 281, figs 7f, 8d) in the contiguous copulatory openings (CO) and the inverted V-shaped anterior part of copulatory ducts (CD), but differs from it by the sclerotized plug (vs. absent) and the S-shaped connecting tubes (CT) (vs. oval).

Description: Male (holotype). Habitus as in Figs 16A–C. Total length 2.68, carapace 1.32 long, 1.12 wide. Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.05, PLE 0.08; interdistances: AME−AME 0.04, ALE−AME 0.02, PME−PME 0.07, ALE−ALE 0.19, PLE−PME 0.07, PLE−PLE 0.30, ALE−PLE 0.08, AME−PME 0.05, AME−PLE 0.15. MOA 0.20 long, anterior width 0.17, posterior width 0.19. Chelicera with 3 promarginal (proximal largest, distal smallest) and 5 retromarginal teeth (distal largest, proximal smallest). Endites longer than wide. Abdomen 1.32 long, 0.88 wide, with weak dorsal scutum in anterior half, extending slightly past midpoint. Legs measurements: I 4.65 (1.20, 0.50, 1.38, 1.12, 0.45); II 3.89 (1.01, 0.45, 1.06, 0.92, 0.45); III 3.24 (0.81, 0.35, 0.77, 0.86, 0.45); IV 4.90 (1.35, 0.43, 1.10, 1.41, 0.61). Legs spination: femora I d1, pv111, II d1, pv11, III d1, IV d1; tibiae I v222222, II v22222; metatarsi I v22222, II v2222.

Colouration (Figs 16 A−C). Carapace yellow, with broad yellow-brown marking along midline, lateral margins with dark grey fringes. Chelicerae, endites, labium and sternum yellow. Legs yellow, patella and tibia I with darkbrown stripes, femora and tibiae II−IV with black-brown annulations. Abdomen gray, with two dark brown fan-shaped markings on antero-lateral part and four black chevrons on posterior part; venter whitish grey.

Palp (Figs 17, 19 A−C, 20). Femoral apophysis (FA) weakly sclerotized, nearly as long as 1/3 of femur. Retrolateral tibial apophysis (RTA) slender, syringe-like, curved toward bulb. Dorsal tibial apophysis (DTA) strong, tapering, extending along the dorsum of cymbium, with a bifurcate tip (one hook-shaped, the other spine-like). Cymbium with a strong lobe-shaped base, directed retro-dorsally. Sperm duct (SD) O-shaped in prolateral view, Ushaped in ventral view, not reaching the middle part of tegulum. Retrolateral tegular apophysis (rTA), membranous, broad, antero-laterally located. Distal tegular apophysis (dTA) crescent, membranous, accompanied by embolus, directed retrolaterally. Embolus (E) slightly curved, spine-like, directed retrolaterally.

Female. Habitus as in Figs 18A, B. As in male, except as noted. Total length 2.69, carapace (Figs 18A, B) 1.29 long, 1.11 wide. Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.05, PLE 0.08; interdistances: AME−AME 0.04, ALE−AME 0.02, PME−PME 0.08, ALE−ALE 0.19, PLE−PME 0.07, PLE−PLE 0.26, ALE−PLE 0.07, AME−PME 0.07, AME−PLE 0.14. MOA 0.19 long, front width 015, back width 0.18. Legs measurements: I 4.59 (1.27, 0.48, 1.42, 0.98, 0.44); II 3.85 (1.01, 0.43, 1.06, 0.92, 0.43); III 3.11 (0.86, 0.42, 0.71, 0.74, 0.38); IV 4.70 (1.30, 0.44, 1.04, 1.30, 0.62). Legs spination: metatarsus I v2222. Abdomen 1.29 long, 1.11 wide.

Colouration (Figs 18A, B). Darker than males.

Epigyne (Figs 18C, D, 19D, E). Epigynal plate S-shaped, longer than wide, medially with a Y-shaped median septum.Copulatory openings (CO) relatively small, touching, antero-medially located, directed anteriorly.Copulatory ducts (CD), anterior part inverted V-shaped, posterior part widen. Bursae (B) large, located medially, covered less than 2/3 of epigynal plate in dorsal view. Glandular appendage (GA) thin, near the bursal base. Connecting tubes (CT) long, S-shaped, anterior part with a sharp turn, posterior touching. Spermathecae (SP) near oval, arranging in a line, slightly separated. Fertilization ducts (FD) long, arising from posterior part of spermathecae, directed anteriorly.

Distribution. Known only from the type locality in Guangxi Zhuang Autonomous Region, China (Fig. 21).