Ketambea aseptifera, Irfan & Zhang & Peng, 2022

Irfan, Muhammad, Zhang, Zhi-Sheng & Peng, Xian-Jin, 2022, Survey of Linyphiidae (Arachnida: Araneae) spiders from Yunnan, China, Megataxa 8 (1), pp. 1-292 : 143

Ketambea aseptifera sp. nov. (ĿḐǞÁƦ)

Figures 159 , 160 , 164

Types: Holotype ♀, CHINA, Yunnan, Fugong County, Lishadi Township, Shibali , 27.10520ºN, 98.77980ºE, alt. 2530m, 10 August 2005, Guo Tang leg. (Tang–05–02).

Paratypes: 13♀, same data as holotype (tang–05–02) ; 2♀, Fugong County, Lumadeng Township , Yamu bridge, 27.12817°N, 98.85977°E, alt. 1500m, 11, 14, 16 August 2005, Guo Tang leg. (Tang –05–04) ; 1♀, Fugong County, 2 km down Shibali , 27.16284°N, 98.78989°E, alt. 2420m, 2 May 2004, Guang-xu Peng leg. (20040502).

Etymology: This epithet derives from the Latin adjective “ aseptifera ” meaning “septum absent”, referring to the posterior margin of the epigyne without a prominent septum.

Diagnosis: This new species resembles K.vermiformis Millidge & Russell-Smith, 1992 (Millidge & RussellSmith, 1992, figs 32, 33) in posterior margin of epigyne without septum, but can be distinguished by the shape of atrium apertures and the position of fertilization ducts in K. aseptifera sp. nov. ( Fig. 159C ); spiral ducts with three and half turns ( Fig. 159C ); spermathecae not covered by the spiral ducts ( Fig. 159C ; Millidge & Russell-Smith, 1992, figs 32, 33).

Description. Female (holotype, Fig. 160A, B ). Total length 2.60. Carapace 1.11 long, 0.83 wide, yellowishbrown, carapace slightly elevated; fovea, cervical and radial grooves distinct. Clypeus 0.25 high. Sternum dark brown, longer than wide, with sparse hairs. Labium yellow, wider than long. Maxillae long, distal end broad with scopulae and spine-like hairs. Chelicerae yellow, with three promarginal and three retromarginal teeth, stridulatory striae absent. AER recurved, PER straight, slightly wider. Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.07, PLE 0.08, AME–AME 0.04, PME– PME 0.08, AME–ALE, 0.06, PME–PLE 0.08, AME– PME 0.04, ALE–ALE 0.38, PLE–PLE 0.40 ALE–PLE contiguous. Length of legs: I 6.02 (1.62, 1.83, 1.68, 0.92), II 5.23 (1.44, 1.56, 1.40, 0.83), III 3.32 (1, 0.96, 0.90, 0.46), IV 4.51 (1.35, 1.29, 1.23, 0.64), legs long, slender and yellow. Leg formula: I-II-IV-III. Tm I 0.52. Tibial spine formula: 2-2-2-2. Abdomen; 1.59 long, 1.21 wide, oval, mid dorsally with distinct patterns and a longitudinal white strip on each side; ventral side brown.

Epigyne ( Fig. 159A–C ):Aperture arch-shaped, septum absent. Vulva: spiral ducts thick, each with three and half loops; spermathecae round, pointing towards each other.

Male. Unknown.

Distribution. Known only from the type locality ( Fig. 164 ).

Figures

FIGURE 159. Ketambea aseptifera sp. nov. female holotype. A, B Epigyne, ventral view C Vulva, dorsal view.

FIGURE 160. Ketambea aseptifera sp. nov. female holotype. A Habitus, dorsal view B Habitus, ventral view.

FIGURE 164. Distribution of Ketambea species.