Nematogmus lushuiensis, 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 : 199-201

Nematogmus lushuiensis sp. nov. (ǎḳứẤƦ) Figures 229C , 230 , 234

Types. Holotype ♀, CHINA, Yunnan, Lushui County, Yaojiaping, at Pianma Road 44.7 km, 25.97479°N, 98.71027°E, alt. 2516m, disturbed forest; dusting webs in understory, 19–20 May 2005, Charles Griswold leg. ( CGY111 ) . Paratypes: 3♀, same data as holotype ( CGY111 ) ; 1♀, Gongshan County, Dabadi of new road, 27.47525ºN, 98.30121ºE, 3013m, 12 November 2004, Guo Tang leg. (Tang–04–11) .

Etymology. This epithet derives from the type locality.

Diagnosis. The new species resembles Nematogmus longior Song & Li, 2008 in the ventral plate with two small shallow semicircular lobes with depression posteriorly and U-shaped spermathecae ( Fig. 230A–C ; Song & Li, 2008, fig. 4G), but can be distinguished by the copulatory ducts with 3 spiral coils in N. lushuiensis sp. nov. ( Fig. 230B, C ), whereas with two spiral coils in N. longior (Song & Li, 2008, fig. 4B, E). Dorsal plate rectangular in N. lushuiensis sp. nov. ( Fig. 230A–C ), whereas trapezoidal in N. longior (Song & Li, 2008, fig. 4C).

Description. Female (holotype, Fig. 229C ): Total length: 2.84. Carapace 1.23 long, 1.11 wide, orange; cervical and radial grooves distinct; cephalic region slightly elevated. Clypeus 0.29 high. Sternum longer than wide, yellowish brown,, sparsely covered with microsetae. Labium wider than long. Maxillae long, distal end broad with scopulae. Chelicerae with four promarginal and five retromarginal teeth. AER recurved, PER procurved, slightly wider. Eye sizes and interdistances: AME 0.05, ALE 0.07, PME 0.05, PLE 0.06, AME–AME 0.03, PME– PME 0.11, AME–ALE, 0.11, PME–PLE 0.09, AME– PME 0.09, ALE–ALE 0.44, PLE–PLE 0.45, ALE–PLE contiguous. Length of legs: I 5.76 (1.79, 1.78, 1.45, 0.74), II 5.37 (1.67, 1.67, 1.32, 0.71), III 4.34 (1.28, 1.27, 1.03, 0.66), IV 5.22 (1.63, 1.54, 1.29, 0.76). Leg formula I-IIIV-III. Tm I 0.43, Tm IV present. All tibia dorsally with two to three long trichobothria. Tibial spine formula: 1-1- 1-1. Abdomen 2.12 long, 1.79 wide, oval, black, dorsally with two pairs of sigillae.

Epigyne ( Fig. 230A–C ): Ventral plate with two small shallow semicircular lobes and depressions posteriorly. Copulatory openings situated posteriorly in shallow lobes. Vulva: Dorsal plate rectangular. Copulatory ducts with three spiral coils. Spermathecae somewhat U-shaped, with short globular arms slightly overlapping the long arm. Fertilization ducts short, directed mesally.

Male. Unknown.

Distribution. Known only from the type locality ( Fig. 234 ).

Nematogmus membranifer Song & Li, 2008 (ȒứẤ Ʀ)

Figures 231–234

Nematogmus membranifer Song & Li, 2008b: 277 e8, figs 5A–F, 6A–G, 7 (Dmf).

Material examined. 2♂ 8♀, CHINA, Yunnan, Tengchong County, Jietou Township, Shaba Village , Lijiazai Group , 25.23635°N, 98.42116°E, alt. 1819m, 23 October 2003, Guo Tang leg. (Tang031023) ; 1♀, Fugong County, Lishadi Township, Shibali , 27.10520ºN, 98.77980ºE, alt. 2530m, 10 August 2005, Guo Tang leg. (Tang–05–02); 1♂, Gongshan County , Gongdang, Shenshan mountain , 28.00930°N, 98.61505°E, alt. 2480–2500m, 9 October 2002, Heng-mei Yan leg. (Yan021009) .

Distribution. China (Yunnan) ( Fig. 234 ).

Genus Nippononeta Eskov, 1992 (SƦø)

Figures

FIGURE 229. Nematogmus cikaiensis sp. nov., female holotype (A, B), Nematogmus lushuiensis sp. nov. female holotype (C). A, C Habitus, dorsal view B Habitus, ventral view.

FIGURE 230. Nematogmus lushuiensis sp. nov. female holotype. A, B Epigyne, ventral view C Vulva, dorsal view.

FIGURE 231. Nematogmus membranifer Song & Li, 2008 palp. A prolateral view B retrolateral view C dorsal view D ventral view.

FIGURE 232. Nematogmus membranifer Song & Li, 2008. A, B Epigyne, ventral view C Vulva, dorsal view.

FIGURE 233. Nematogmus membranifer Song & Li, 2008 male (A–C) and female (D–F). A, D Habitus, dorsal view B, E Habitus, lateral view C, F Habitus, ventral view.

FIGURE 234. Distribution of Nematogmus species.