Prosoponoides yakouensis, 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 : 240

Prosoponoides yakouensis sp. nov. (ƋnAEƦ)

Figures 278 , 279 , 286

Types. Holotype ♀, CHINA, Yunnan, Fugong County, Lishadi Yakou , 25.21136ºN, 98.69651ºE, 3611m, 5 October 2007, Xian-jin Peng leg. (20071005) . Paratype: 1♀, same data as holotype (20071005).

Etymology. This epithet derives from the type locality.

Diagnosis. The new species can be distinguished from all other congeners by the spermathecae bean-shaped and parmula D-shaped ( Fig. 278A–D ).

Description. Female (holotype, Fig. 279A, B ): Total length: 2.34. Carapace 0.81 long, 0.74 wide; cephalic region slightly elevated, brown; fovea, cervical and radial grooves distinct. Clypeus 0.21 high. Sternum longer than wide, brown,, sparsely covered with microsetae. Labium wider than long. Maxillae long, distal end broad with scopulae. Chelicerae with three promarginal and three retromarginal teeth. Eyes: AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.05, ALE 0.07, PME 0.07, PLE 0.07, AME–AME 0.04, PME–PME 0.05, AME–ALE, 0.06, PME–PLE 0.07, AME–PME 0.08, ALE–ALE 0.37, PLE–PLE 0.39, ALE–PLE contiguous. Length of legs: I 3.41 (0.96, 1.07, 0.81, 0.57), II 3.01 (0.83, 0.96, 0.71, 0.51), III 2.09 (0.61, 0.65, 0.51, 0.32), IV 2.81 (0.84, 0.87, 0.67, 0.43). Leg formula I-II-IV-III. Tm I 0.38 and Tm IV 0.23. Tibial spine formula: 2-2-2-2. Abdomen 1.53 long, 0.74 wide, cylindriform, gray, densely covered with white patches; ventral side light brown.

Epigyne ( Fig. 278A–D ): Posteriorly with two openings of entrance grooves separated by median septum, margins curved and sclerotized. Parmula Dshaped projecting posteriorly from the dorsal plate with a large pit ventrally. Vulva: wider than long, entrance grooves started from ventral wall, with about half coil, turning points and spermathecae present dorso-mesally on apices; spermathecae bean-shaped, curved, pointing towards each other; fertilization ducts long, present dorsolaterally, extending mesally.

Male. Unknown.

Distribution. Known only from the type locality ( Fig. 286 ).

Figures

FIGURE 278. Prosoponoides yakouensis sp. nov., female holotype. A, B Epigyne, ventral view C Vulva, dorsal view D Vulva, anterior view.

FIGURE 279. Prosoponoides yakouensis sp. nov., female holotype. A Habitus, dorsal view B Habitus, ventral view.

FIGURE 286. Distribution of Prosoponoides species.