Relictocera wugen Li & Li

Chang, Wan-Jin, Li, Fengyuan & Li, Shuqiang, 2019, On the genera Qiongocera and Relictocera (Araneae, Psilodercidae) from Southeast Asia, ZooKeys 862, pp. 61-79 : 64-66

Relictocera wugen Li & Li sp. nov. Figs 2C, 3D, 6, 7, 12B, 13

Types.

Holotype: ♂ (IZCAS), Vietnam, Quang Binh Province, Phong Nha-Ke Bang National Park, outside of Botanical Garden, 17°32.895'N, 106°17.830'E, 261 m, 23.VIII.2015, Zhao Q., Li Y. & Chen Z. Paratypes: 1♂1♀ (IZCAS), same data as holotype.

Etymology.

The species name is a noun in apposition derived from the Chinese pinyin " wugen " ("five stripes") and refers to the five appendages on the male bulb, including the embolus.

Diagnosis.

Males of R. wugen sp. nov. can be distinguished from those of R. sigen sp. nov. by the nearly straight embolus (Fig. 7B) vs. a spiralled embolus Fig. 9B; R. wugen sp. nov. has 4 distinct and relatively long bulbal appendages (Fig. 7B) vs. 3 relatively short bulbal appendages (Fig. 9B); pyriform bulb (Fig. 7B) vs. globular bulb (Fig. 9B); carapace wider than long vs. longer than wide; females can be distinguished from R. qianzi sp n. by a pair of slender and elongated spermathecae that curve upward vs. ovoid spermathecae flanked laterally by a pair of translucent ducts (Fig. 6A).

Description.

Male (Holotype). Total length 1.70; carapace 0.70 long, 0.63 wide; abdomen 1.00 long, 0.69 wide. Carapace round, pale yellow, with 3 longitudinal dark brown bands; the middle band 2 times wider than the lateral band (Fig. 6D). Chelicerae yellow (Fig. 12B). Clypeus light brown, with a long, quadrifurcate medial projection (Fig. 6C, D). Endites brown. Labium brown with a pair of pale spots. Sternum with longitudinal white median band and pair of dark brown lateral stripes. Abdomen dorsally with longitudinal white band anteriorly and with 3 pairs of dark brown lateral stripes, posterior part with longitudinal dark brown stripes, anterior of ventrum with pair of circular pale lateral patches, posterior with dark brown lateral area and several longitudinal irregular dark brown spots (Fig. 6C, D). Legs uniformly brown; measurements: I 10.75 (2.75, 0.25, 3.25, 3.25, 1.25), II 7.50 (2.24, 0.25, 2.13, 2.13, 0.75), III 5.40 (1.60, 0.20, 1.50, 1.50, 0.60), IV missing. Palp (Fig. 7 A–D): femur 5 times longer than patella; patella not swollen; tibia pale, 2 times shorter than femur, with dark distal ring; cymbium pale, distal half darker than proximal, with long and thin dark distal protrusion directed forward; length/width ratio = 3.13; bulb light yellow, oval, with 4 appendages; embolus straight, flattened, tapering apically; appendages (except embolus) differ in length, merging separately at distal part of bulb and adjacent to embolus (Fig. 7B).

Female (Paratype). General features and coloration similar to those of male except for the absence of a quadrifurcate clypeal projection (Fig. 6E, F). Measurements: total length 2.50; carapace 0.75 long, 0.80 wide; abdomen 1.75 long, 0.80 wide. Leg measurements: I 6.54 (2.00, 0.16, 2.19, 1.19, 1.00), II 5.56 (1.56, 0.25, 1.50, 1.50, 0.75), III 3.90 (1.09, 0.16, 1.09, 1.09, 0.47), IV 6.25 (1.75, 0.25, 1.75, 1.75, 0.75). Epigastric furrow (slit) with pair of translucent lateral lobes (Fig. 6B). Internal genitalia: one pair of slender and elongated spermathecae curving anteriorly with pointed tips, bases separated by 3 times the width of the spacing of the of tips. (Fig. 6A).

Distribution.

Known only from the type locality (Fig. 13).