Ketambea liupanensis ( Tang & Song, 1992 )

Li, Jian Yong, Liu, Jie & Chen, Jian, 2018, A review of some Neriene spiders (Araneae, Linyphiidae) from China, Zootaxa 4513 (1), pp. 1-90: 5-6

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Ketambea liupanensis ( Tang & Song, 1992 )

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Ketambea liupanensis ( Tang & Song, 1992)  new combination

Figs 1–3View FIGURE 1View FIGURE 2View FIGURE 3, 69View FIGURE 69

Neriene liupanensis Tang & Song, 1992b: 415  , f. 1–3 (Df); Song, Zhu & Chen, 1999: 194, f. 110H–I (f); Hu, Zhang & Li, 2011: 528, f. 1a–e (f, Dm).

Material examined. Ningxia:GoogleMaps  Guyuan City, Longde County, Liupanshan Mt.   GoogleMaps Red Army Memorial Tower, 35.67°N, 106.21°E, 2782m, 8.viii.2010, F.X. Liu, J. Chen & B.R. Zhu leg., 3FF (CBEE); Xizang: Linzhi Prefecture, Linzhi County, Boshuwang Park , 29.65°N, 94.36°E, 3100m, 18.viii.2009, Z.Z. Yang leg., 1M ( HEBU)GoogleMaps  .

Diagnosis: The long filiform embolus, the absence of terminal apophysis, the claviform distal suprategular apophysis, the absence of parmula, the erect fertilization grooves indicated that Neriene liupanensis Tang & Song, 1992  and Neriene nigripectoris ( Oi, 1960)  should not belong to the genus Neriene  ( Figs 1View FIGURE 1, 2View FIGURE 2 B–D, 3B–D, 4–5, 6C– E). According to Millidge & Russell-Smith (1992) and Tanasevitch (2017), the atrium with paired, more or less round openings anteriorly, the lightly sclerotized suprategular apophysis largely hidden by the embolic division, the reduced paracymbium (except K. liupanensis  ) and the coiled embolus with fairly slender end indicate N. liupanensis  and N. nigripectoris  should belong to the genus Ketambea Millidge & Russell-Smith, 1992  . The male of K. liupanensis  can be distinguished from other Ketambea  species by the developed paracymbium ( Figs 1BView FIGURE 1, 2B, 2DView FIGURE 2). The female of K. liupanensis  is similar to K. nigripectoris  and Ketambea acuta Tanasevitch, 2017  in having similar fertilization grooves tracing which are running downwards from the spermathecae inside the spiral tracing of copulatory groove, but can be distinguished from the latters by the copulatory groove with more coils ( K. liupanensis  with three coils, but K. nigripectoris  and K. acuta  with two coils) ( Figs 1View FIGURE 1 D–E, 3C–D, 4F–G, 6D–E).

Description: The measurements see Hu et al. (2011). Male palp ( Figs 1View FIGURE 1 A–B, 2B–D): Tibia shorter than cymbium. Paracymbium simple, U-shaped, with distal part widened. Distal suprategular apophysis small, claviform. Lamella well-developed, with four projections: lateral one long, U-shaped, with a claviform end curved upwardly, and posterior one short, with a slightly sharp end; anterior one blunt, with round margin; dorsal one short, with a sharp end. Embolus long, coiled. Embolic membrane massive, long, with coiled end. Male habitus as in Fig. 2AView FIGURE 2.

Epigynum ( Figs 1CView FIGURE 1, 3BView FIGURE 3): aperture triangular, septum narrow, dividing aperture into two parts. Vulva ( Figs 1View FIGURE 1 D– E, 3C–D): Vulva longer than wide; copulatory grooves spiral, with about three coils; fertilization groove without coils, directly running downwards from the spermatheca inside the spiral tracing of copulatory groove; turningpoints situated laterally, pointing mesally; spermathecae oval. Female habitus as in Fig. 3AView FIGURE 3.

Distribution: China (Ningxia, Gansu, Xizang), Russia ( Fig. 69View FIGURE 69).

Remarks. Though we did not examine any Ketambea  type specimens, Dr. Anderi V. Tanasevitch just examined the male holotype of K. rostrata Millidge & Russell-Smith, 1992  in 2017 for the diagnosis of K. acuta Tanasevitch, 2017  . N. nigripectoris  and the female of N. liupanensis  are very similar to K. acuta  . We think it will be better to place these two species tentatively in Ketambea  than Neriene  , although the Ketambea  needs further revision.














Ketambea liupanensis ( Tang & Song, 1992 )

Li, Jian Yong, Liu, Jie & Chen, Jian 2018


Neriene liupanensis

Song, D. X. & Zhu, M. S. & Chen, J. 1999: 194Tang, Y. Q. & Song, D. X. 1992: 415