Nigorella mengla sp. nov. Figures 12, 13

Type material.

Holotype ♂(IZCAS-Ar40911), China: Yunnan: Xishuangbanna, Mengla County, Menglun Township, XTBG, Leprosy Village, 21.8932N, 101.2883E, elevation ca 550 m, 20.IX.2017, Yanfeng Tong leg. Paratypes 4♂1♀(IZCAS-Ar40912-Ar40916), same data as holotype.

Etymology.

The specific name is a noun in apposition and refers to the type locality.

Diagnosis.

Nigorella mengla sp. nov. resembles N. sichuanensis Peng, Xie & Kim, 1993 and Evarcha orientalis (Song & Chai, 1992) by the bifurcated RTA and dorsal embolic apophysis behind the embolus but differs in the following: the palpal tibia is wider than long (vs. longer than wide in N. sichuanensis); the tegular lobe is folded (vs. straight in N. sichuanensis and E. orientalis). In the female, the spermathecae are S-shaped (vs. spermathecae coiled in N. sichuanensis), and the hoods are deeper (vs. unobvious in E. orientalis).

Description.

Male (Figs 12, 13C, E). Total length 8.23. Carapace 4.5 long, 3.19 wide. Abdomen 4.04 long, 2.69 wide. Clypeus 0.22 high. Eye sizes and inter-distances: AME 0.79, ALE 0.38, PLE 1.04, AERW 2.35, PERW 2.34, EFL 1.02. Legs: I 7.97 (2.50 + 3.28 + 1.28 + 0.91), II 5.19 (1.64 + 1.88 + 0.96 + 0.71), III 8.01 (2.81 + 2.56 + 1.61 + 1.03), IV 7.85 (2.45 + 2.56 + 1.84 + 1.00). Carapace black, red-brown medially, carapace edge and sides of cephalic part with white setal stripes, thoracic part sloping abruptly, clothed with white and dark setae. Fovea indistinct. Clypeus orange-brown to dark brown, covered with thin setae. Chelicerae black, with two retromarginal teeth and one promarginal tooth. Endites and labium black. Sternum black, covered with dark setae. Legs red-brown except femora with black pattern. Abdomen elongated oval, dorsum with two pairs of muscle depressions, with white line centrally, white line widens medially; venter black with dark setae; sides black with white spots.

Palp (Fig. 12A-E): Tibia slightly wider than long, RTA bifurcated, ventral branch blunt, dorsal ramus well-developed, pointed; cymbium flattened, covered with long setae; bulb almost round, with sperm duct extending along margin, tegular lobe folded; embolus stout, dorsal embolic apophysis behind embolus, connected to embolus with membrane.

Female (Fig. 13A, B, D). Total length 7.85. Carapace 4.30 long, 2.94 wide. Abdomen 4.12 long, 2.04 wide. Clypeus 0.19 high. Eye sizes and inter-distances: AME 0.65, ALE 0.41, PLE 0.33, AERW 2.36, PERW 2.35, EFL 1.02. Legs: I 6.43 (2.20 + 2.58 + 0.92 + 0.73), II 6.10 (2.00 + 2.45 + 0.88 + 0.77), III 7.42 (2.56 + 2.50 + 1.48 + 0.88), IV 7.08 (2.18 + 2.48 + 1.56 + 0.86). Habitus similar to that of male except paler.

Epigyne (Fig. 13A, B) wider than long, with pair of hoods near epigastral furrow; copulatory openings situated medially, C-shaped; copulatory ducts indistinct; spermathecae S-shaped; fertilization ducts well-developed.

Distribution.

Known only from the type locality in Yunnan, China.