Otacilia nonggang sp. nov.

Figs 11 ̄13

http://zoobank.org/NomenclaturalActs/be17d40c-3a36-45a8-970d-516208069507

Type material. Holotype: ♂: CHINA: Guangxi Zhuang Autonomous Region, Chongzuo City, Longzhou County, Nonggang National Nature Reserve, Shangjin Station, 22°18.84'N, 106°55.4'E, 187 m a.s.l., 2 November 2017, leg. A.L. He, K.K. Liu, Q. Cai, J.X. Liu, J.H. Liu and Z.G. Huang. Paratypes: 1 ♂, 2 ♀, with same data as holotype; 1 ♀, CHINA: Guangxi Zhuang Autonomous Region, Chongzuo City, Longzhou County, Nonggang National Nature Reserve, Nonggang Station, 22°28.38'N, 106°57.48'E, 184 m a.s.l., 25 October 2017, leg. A.L. He, K. K. Liu, Q. Cai, J.X. Liu, J.H. Liu and Z. G. Huang ; 1 ♀, same locality, Nonggang Station, 22°27.85'N, 106°55.94'E, 228 m a.s.l., 26 October 2017, leg. A.L. He, K. K. Liu, Q. Cai, J.X. Liu, J.H. Liu and Z. G. Huang ; 1 ♀, same locality, Nonggang Station, Longheng Village, 22°28.47'N, 106°58.98'E, 270 m a.s.l., 29 October 2017, leg. A.L. He, K. K. Liu, Q. Cai, J.X. Liu, J.H. Liu and Z.G. Huang.

Etymology. The specific name refers to the type locality; noun in apposition.

Diagnosis. Male of this species is very similar to those of Otacilia bawangling Fu, Zhang & Zhu, 2010 (Fu et al. 2010: 645, figs 3ĀF), O. biarclata Fu, He & Zhang, 2015 (Fu et al. 2015: 437, figs 1–20), O. florifera Fu, He & Zhang, 2015 (Fu et al. 2015: 444, figs 21–34), O. jianfengling Fu, Zhang & Zhu, 2010 (Fu et al. 2010: 641, figs 1ĀH, 2A–E) and O. limushan Fu, Zhang & Zhu, 2010 (Fu et al. 2015: 444, figs 35̄51), but differs from all these species by the male palp having a RTA with a thick and strong tip, while females can be distinguished by the elongated bursae located at the strong sclerotized band and the roughly elliptical spermathecae (Figs 11B ̄D, 12C, 13ĀC, E).

Description: Male. Habitus as in Fig. 11A. Total length 3.64, prosoma (Fig. 11A) yellow, elevated in dorsal view, with radial, irregular brown stripes on the surface, length 1.61, width 1.30. Eye diameters: AME 0.14, ALE 0.13, PME 0.09, PLE 0.12; interdistances: AME–AME 0.07, ALĒAME 0.01, PME–PME 0.10, ALĒALE 0.32, PLĒPME 0.01, PLĒPLE 0.29, ALĒPLE 0.04, AMĒPME 0.10. MOA 0.29 long, front width 0.28, back width 0.26. Cervical groove and fovea distinct. Chelicerae yellow, stout, with two strong setae near base in frontal view, abundant hairs along promarginal teeth, three promarginal (proximal largest, distal smallest) and three retromarginal teeth (third largest, others equal in size). Endites yellowish, longer than wide. Labium shorter than wide. Sternum slightly longer than wide, yellowish, setae sparse. Opisthosoma elliptical in dorsal view (Fig. 11A), length 2.03, width 0.94, grey dorsally, with three inverted V-shaped yellowish stripes and two arched stripes on posterior part, oval yellowish stripes in front of the anal tubercle; narrow yellow dorsal scutum in anterior half. Legs yellow, without annulations; measurements: I 8.82 (2.10, 0.57, 2.51, 2.18, 1.46); II 6.57 (1.70, 0.49, 1.83, 1.43, 1.12); III 5.37 (1.38, 0.45, 1.21, 1.43, 0.90); IV 8.54 (2.32, 0.55, 2.11, 2.38, 1.18). Leg spination: Femur I and II with single dorsal spine; Femur I pv11111, II pv111; Tibia I v222222222, II v222222222; Metatarsus I v2222, II pv111, rv1111. Leg formula: 1423. Spinnerets yellow, with abundant setae.

Palp (Figs 11B ̄D, 13ĀC). Femur with ventral apophysis. RTA large, finger-like, with curved and thick apex. Spermophor strongly sclerotized. Tegular apophysis near embolus, showing small triangular tip in ventral view. Embolus relatively short, hook-shaped.

Female. Habitus as in Fig. 12A. As in male except as noted. Females darker than males. Total length 4.84, prosoma length 1.90, width 1.60. Eye diameters: AME 0.15, ALE 0.12, PME 0.11, PLE 0.12; interdistances: AME–AME 0.05, ALĒAME 0.03, PME–PME 0.10, ALĒALE 0.37, PLĒPME 0.05, PLĒPLE 0.39, ALĒPLE 0.13, AMĒPME 0.10. MOA 0.36 long, front width 0.34, back width 0.33. Chelicerae with three promarginal (first largest, third smallest) and four retromarginal teeth (fourth largest, others equal in size). Opisthosoma (Fig. 12A) length 2.76, width 1.73, pale grey, with arched, yellowish stripe near anus in dorsal view. Legs without annulations. Leg measurements: I 9.30 (2.27, 0.68, 2.93, 1.82, 1.60); II 7.73 (1.97, 0.71, 2.15, 1.56, 1.34); III 5.98 (1.58, 0.45, 1.25, 1.74, 0.96); IV 9.72 (2.64, 0.65, 2.33, 2.69, 1.41). Leg spination: Femur I pv1111111, II pv1111; Tibia I v2222222222, II v222222222; Metatarsus I v2222, II pv111, rv1111. Leg formula: 4123.

Epigyne (Figs 12B, C, 13D, E) with small copulatory openings hidden behind sclerotized ridges. Bursae elongated, anteromedially located at strong sclerotized band. Copulatory ducts very short, broad, medial. Transparent bursae located anteriorly, large, elongated. Glandular appendages short, located at bands between copulatory ducts and spermathecae. Spermathecae relatively large, roughly elliptical, their posterior part hidden in dorsal view under posterior plate. Fertilization ducts arising sub-apical-medially from spermathecae.

Distribution. Known only from the type locality in Guangxi Zhuang Autonomous Region, China (Fig. 16).