Nasoonaria orthogonia sp. nov. (OiḆẶƦ) Figures 221–223, 227 Types. Holotype ♂, CHINA, Yunnan, Houqiao Township, 25.35391°N, 98.25488°E, alt. 1785m, 28 May 2006, Xin-ping Wang and Peng Hu leg. (Wang060528–1). Paratypes: 2♀, same data as holotype (Wang060528); 2♀, Tengchong County, Jietou Township, Xinzhuang Village, 25.44744°N, 98.70964°E, alt. 1950m, 23 May 2006, Chang-min Yin, Jia-fang Hu and Ming-wei Yang leg. (YHY11); 1♀, Tengchong County, Mazan Township, Volcano Park, 25.02369°N, 98.47686°E, alt. 1937m, 2 June 2006, Chang-min Yin, Jia-fang Hu, Ming-wei Yang and Shao-xian He leg. (YHY19). Etymology. This epithet derives from the Latin adjective “ orthogonius ”, meaning “rectangular”, referring to the rectangular dorsal plate in the epigyne. Diagnosis. The new species resembles Nasoonaria yunnanensis (Xia, et al. 2001) comb. nov. in having a similar paracymbium in male palp; the dorsal plate and the spermathecae in epigyne (Figs 221A–D, 222A–C; Song & Li, 2011, figs 11D, 13D), but can be distinguished by the dorsal tibial apophysis narrowing towards the tip with pointed end in N. orthogonia sp. nov. (Fig. 221A, B, D), whereas round in N. yunnanensis comb. nov. (Song & Li, 2011, fig. 11B). Protegulum not bifurcated in N. orthogonia sp. nov. (Fig. 221A, B, D), whereas bifurcated in N. yunnanensis comb. nov. (Song & Li, 2011, fig. 11C). Copulatory ducts somewhat sinuous in N. orthogonia sp. nov. (Fig. 222B, C), whereas coiled in N. yunnanensis comb. nov. (Song & Li, 2011, fig. 13A, B, F). Description. Male (holotype, Fig. 223A–C): Total length: 2.21. Carapace 1 long, 0.75 wide, brown; fovea, cervical and radial grooves distinct; with slight lobe in the middle, in addition to some microsetae anterior to the lobe and with large cephalic pits present at the base. Clypeus 0.21 high. Sternum longer than wide, dark 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 straight, slightly wider. Eye sizes and interdistances:AME 0.07, ALE 0.08, PME 0.06, PLE 0.07, AME–AME 0.03, PME–PME 0.07, AME– ALE, 0.03, PME–PLE 0.04, AME–PME 0.06, ALE–ALE 0.34, PLE–PLE 0.37, ALE–PLE contiguous. Length of legs: I 3.06 (0.88, 0.97, 0.72, 0.49), II 2.95 (0.86, 0.93, 0.68, 0.48), III 2.38 (0.69, 0.74, 0.54, 0.41), IV 2.98 (0.89, 0.94, 0.68, 0.47). Leg formula I-IV-II-III. Tm I 0.36, Tm IV absent. Tibial spine formula: 2-2-1-1. Abdomen 1.21 long, 0.77 wide, oval, gray, posteriorly with three chevrons; ventral side brown. Palp (Fig. 221A–D): Patella shorter than tibia, mesally grooved; tibia conic, dorsal tibial apophysis narrowing towards tip with pointed end, with two retrolateral and one dorsal trichobothria. Paracymbium U-shaped, distal arm grooved. Protegulum simple, with transparent tip. Distal suprategular apophysis broad basally, grooved and gradualy narrowing towards the tip. Lamella large, widened distally. Embolus long, slightly curved, forming a broad coil. Female (one of the paratypes, Fig. 223D, E): Total length: 2.82. Carapace 1.06 long, 0.80 wide, brown; fovea, cervical and radial grooves distinct. Clypeus 0.22 high. Sternum longer than wide, dark 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 straight, slightly wider. Eye sizes and interdistances: AME 0.07, ALE 0.08, PME 0.07, PLE 0.08, AME–AME 0.03, PME–PME 0.07, AME–ALE, 0.05, PME–PLE 0.05, AME–PME 0.07, ALE–ALE 0.37, PLE–PLE 0.40, ALE–PLE contiguous. Length of legs: I 3.41 (0.99, 1.12, 0.77, 0.53), II 3.19 (0.91, 1.05, 0.74, 0.49), III 2.58 (0.79, 0.79, 0.60, 0.40), IV 3.26 (0.90, 1.06, 0.79, 0.51, 0.26). Leg formula I-IV-II-III. Tm I 0.33, Tm IV absent. Tibial spine formula: 2-2-1-1. Abdomen 1.76 long, 1.14 wide, oval, gray, posteriorly with three chevrons; ventral side brown. Epigyne (Fig. 222A–C): Ventral plate slightly narrowed mesally. Dorsal plate completely exposed. copulatory openings situated posteriorly between the dorsal and ventral plate. Copulatory ducts long, sinuous, extending anteriorly then turning back to spermathecae. Spermathecae globular, separated from each other by about 2.5 times of their diameters. Fertilization ducts directed mesally. Distribution. Known only from the type locality (Fig. 227). Nasoonaria sinensis Wunderlich & Song, 1995 (ϕ⁂ ẶƦ) Figures 224–227 Nasoonaria sinensis Wunderlich & Song, 1995: 347, figs 11–18 (Dmf); Song, Zhu & Chen, 1999: 188, fig 107H–J (mf); Tanasevitch, 2014d: 408, figs 58–63 (mf). Material examined. 3♂ 1♀, CHINA, Yunnan, Gongshan County, Cikai Township, 53 km W of Gongshan on Dulong Valley Road, 27.77422°N, 98.44716°E, alt. 3380m, 1 October 2002, D. H. Kavanaugh leg. (DHK –2002–033). Distribution. China (Yunnan) (Fig. 227). Nasoonaria yunnanensis (Xia, Zhang, Gao, Fei & kim, 2001) comb. nov. (ȓƃẶƦ) Walckenaeria yunnanensis Xia et al. 2001: 163, figs 8–13 (Dmf); Song & Li, 2011: 191, figs 11A–D, 12A–E, 13A–G (mf). Distribution. China (Yunnan) (Fig. 227). Remarks. Male palp embolic division and the generalized structure of epigyne resembles Nasoonaria magna Tanasevitch, 2014 (Zhao & Li, 2014, figs 58A–D, 59A–E, 60A–F, 61A-D), N. pseudoembolica Tanasevitch, 2019 (fig. 134, figs 4–6, 14–20) and Nasoonaria orthogonia sp. nov. (Figs 221A–D, 222A–C). Based on the characteristics and the resemblance to above mentioned species, Walckenaeria yunnanensis Xia, Zhang, Gao, Fei & Kim, 2001 best fits in the genus Nasoonaria and proposed here as Nasoonaria yunnanensis (Xia, Zhang, Gao, Fei & kim, 2001) comb. nov. Genus Nematogmus Simon, 1884 (ứẤƦø)

Published as part of Irfan, Muhammad, Zhang, Zhi-Sheng & Peng, Xian-Jin, 2022, Survey of Linyphiidae (Arachnida: Araneae) spiders from Yunnan, China, pp. 1-292 in Megataxa 8 (1) on pages 190-194, DOI: 10.11646/megataxa.8.1.1, http://zenodo.org/record/7526571