Ketambea nigripectoris ( Oi, 1960 ) Li & Liu & Chen, 2018

Li, Jian Yong, Liu, Jie & Chen, Jian, 2018, A review of some Neriene spiders (Araneae, Linyphiidae) from China, Zootaxa 4513 (1), pp. 1-90 : 6-9

Ketambea nigripectoris ( Oi, 1960) new combination

Figs 4–6 , 69

Neolinyphia nigripectoris Oi, 1960: 227 , f. 330–332 (Dmf); Namkung, 1964: 36, f. 17 (f); Paik, 1965a: 68, f. 22–24 (mf); Paik, 1978e: 262, f. 112.1–4 (mf); Ono, Matsuda & Saito, 2009: 339, f. 1230–1233 (mf).

Neriene nigripectoris Brignoli, 1983: 304 ; Feng, 1990: 129, f. 104.1–4 (mf); Kim & Kim, 2000b: 25, f. 8A–E (mf); Song, Zhu & Chen, 2001: 149, f. 84A–C (mf); Namkung, 2002: 156, f. 17.9a–b (mf); Kim & Cho, 2002: 286, f. 727–732 (mf); Namkung, 2003: 158, f. 17.9a–b (mf); Lee, Kang & Kim, 2009: 134, f. 46a–c (mf); Yin et al., 2012: 532, f. 252a–e (mf); Yoo et al., 2015: 35 (S of Neriene woljeongensis ).

Linyphia nigripectoris Yaginuma, 1986: 68 , f. 37.1 (mf); Chikuni, 1989b: 50, f. 19 (mf).

Neriene woljeongensis Kim, Ye & Jang, 2013: 152 , f. 1–10 (Df).

Material examined, Hubei: Luotian County, Tiantangzai National Forest Park, 31.11°N, 115.73°E, 946m, 23.vii. to 3.viii.2009, X. Xu & H.J. Xie leg., 23MM and 61FF (CBEE). Hainan: Bawangling Mountain National Nature Reserve , 19.13°N, 109.10°E, 300m 23.viii.2007, H. Yu leg., 5MM and 5FF ( CBEE) .

Diagnosis: K. nigripectoris is very similar to K. acuta , but can be distinguished from the latter by the following characters: 1, the post projection of lamella significantly short without extending beyond the cymbium margin in K. nigripectoris , but slightly longer with extending beyond cymbium margin in K. acuta ( Figs 4A , 5A ); 2, the septum which divides the epigynal aperture into two parts narrow, about 1/5 aperture width in K. nigripectoris , but wide, about 1/ 3 in K. acuta ( Figs 4D , 6C ). K. nigripectoris is also very similar to K. rostrata Millidge & Russell-Smith, 1992 , but can be distinguished from the latter by the following characters: 1. the lateral projection of lamella with two apophyses, the distal margin of upper one blunt in K. nigripectoris , but sharp in K. rostrata ( Figs 4A, 4C, 4E , 5 A–C, 5E); 2, the epigynal aperture oval in K. nigripectoris , but triangular in K. rostrata ( Figs 4D , 6C ); 3, the fertilization groovse running downwards from the spermatheca inside the spiral tracing of copulatory groove in K. nigripectoris , but outside the spiral tracing of copulatory grooves in K. rostrata ( Figs 4 F– G, 6D–E).

Description: The measurements see Kim & Kim (2000). Male palp ( Figs 4 A–C, 4E, 5): Tibia shorter than cymbium. Paracymbium tiny. Distal suprategular apophysis simple, long. Lamella well-developed, with four projections: lateral one large, with two branches, the upper one flat, with blunt margin,lower one longer, with sharp end; dorsal one short, with a slightly sharp end; posterior one significantly short, almost reduced. Embolus long, coiled, with wide base and slender end. Embolic membrane massive, long, with coiled end. Male habitus as in Fig. 6B .

Epigynum ( Figs 4D , 6C ): aperture oval, septum narrow, dividing aperture into two parts. Vulva ( Figs 4 F–G, 6D–E): Vulva almost square; copulatory grooves spiral, with about two coils; fertilization groove without coils, directly running downwards from the spermatheca inside the spiral tracing of copulatory groove; turning-points situated laterally, pointing mesally; spermathecae slender, pointing mesally. Female habitus as in Fig. 6A .

Distribution: China (Beijing, Hubei, Sichuan, Anhui, Fujian, Zhejiang, Yunnan, Jiangxi, Guangdong, Guizhou, Hainan), Japan, North Korea, Russia ( Fig. 69 ).

Figures

FIGURE 4. Ketambea nigripectoris (Oi, 1960) n. comb., drawings based on specimens from Tiantangzai National Forest Park, Hubei. A, Pedipalp, prolateral. B, Suprategulum, retrolateral. C, Pedipalp, retrolateral. D, Epigynum, ventral. E, Embolic division, retrolateral. F–G, Epigynum, cleared. F, Ventral. G, Dorsal. Scale bars, 0.2 mm.

FIGURE 5. Ketambea nigripectoris (Oi, 1960) n. comb., photos based on male specimen from Tiantangzai National Forest Park, Hubei. A–C, Pedipalp. A, Prolateral. B, Retrolateral. C, Ventral. D, Suprategulum, retrolateral. E, Embolic division, retrolateral. Scale bars, 0.2 mm.

FIGURE 6. Ketambea nigripectoris (Oi, 1960) n. comb., photos based on specimens from Tiantangzai National Forest Park, Hubei. A, Female habitus, dorsal. B, Male habitus, dorsal. C–E, Epigynum. C, Ventral. D, Ventral, cleared. E, Dorsal, cleared. Scale bars, A, B, 1 mm; C, D, E, 0.2 mm.

FIGURE 69. Map with sampling localities for each Neriene species. TTZ: Tiantangzai National Forest Park, Luotian County, Hubei Province; BWL: Bawangling Mountain National Nature Reserve, Hainan Province.