Singaporemma wulongensis, Lin, Yucheng & Li, Shuqiang, 2014

Lin, Yucheng & Li, Shuqiang, 2014, New cave-dwelling armored spiders (Araneae, Tetrablemmidae) from Southwest China, ZooKeys 388, pp. 35-67 : 39-40

Singaporemma wulongensis sp. n. Figs 7-9, 17, 20B, 22

Material.

Holotype ♂, paratypes 8♂ and 20♀ (SCUM), CHINA, Chongqing: Wulong County, Tudi Town, Tiansheng Village, Xiaodong Cave, 29°31.853'N, 107°50.817'E, elevation ca. 1050 m, 17 October 2010, Liang Dou and Yucheng Lin leg.

Etymology.

The specific name refers to the type locality; adjective.

Diagnosis.

This new species is similar to Singaporemma bifurcata Lin & Li, 2010 (see Lin & Li 2010: figs 29-37) but the male can be distinguished by the base of embolus (Figs 8 A–C, 17 A–C), the flexible embolic end (Figs 8 D–F, 17 D–E), and the long oval palpal bulb (Figs 8 A–B, 17 A–B). The females are distinguished by the “Ω” -shaped inner vulval plate, and the long central process (Figs 9C, 20B).

Description.

Male (holotype). Coloration: body reddish-brown; legs yellowish-brown.

Measurements: total length 1.21; carapace 0.53 long, 0.45 wide, 0.44 high; abdomen 0.79 long, 0.60 wide, 0.54 high; clypeus 0.18 high; sternum 0.32 long, 0.32 wide. Length of legs: I 1.29 (0.41, 0.13, 0.30, 0.21, 0.23); II 1.16 (0.36, 0.13, 0.27, 0.20, 0.21); III 1.07 (0.32, 0.13, 0.23, 0.19, 0.21); IV 1.43 (0.43, 0.13, 0.36, 0.25, 0.26).

Carapace (Figs 7 A–B, G and E) finely reticulated, margin rugose; eyes with black base; cephalic part flat, covered with long setae; clypeus sharply sloping anteriorly; sternum reticulated, marginally rugose. Legs: cuticle striated; all tibiae with 3 trichobothria and all metatarsi with a trichobothrium.

Abdomen (Figs 7 A–B, E): dorsal scutum long, oval, covered with long setae, margin reticulated, center granulated; ventral scutum reticulated, margin rugose; lateral scutum I short, perigenital plate broad.

Palp (Figs 8 A–F; 17 A–E): femoral cuticle granular, striated, approx. 3 times as long as patella; patella proximally narrow, distally wide; tibia short, swollen, 1.6 times as wide as femur; bulb egg-shaped, surface smooth; embolus long, strongly sclerotized, starting from subproximal-ventral 1/3 position of bulbous surface, and curved downwards (Figs 8C; 17A, C); embolic tip flexuous, forked (Figs 8 D–F; 17 D–E).

Female (paratype). Coloration: body slightly lighter than in male; legs yellowish-brown.

Measurement: total length 1.23; carapace 0.54 long, 0.43 wide, 0.41 high; abdomen 0.80 long, 0.63 wide, 0.59 high; clypeus 0.17 high; sternum 0.30 long, 0.31 wide. Length of legs: I 1.21 (0.38, 0.13, 0.29, 0.20, 0.21); II 1.11 (0.34, 0.13, 0.25, 0.18, 0.21); III 1.03 (0.30, 0.12, 0.22, 0.18, 0.21); IV 1.38 (0.42, 0.13, 0.34, 0.23, 0.25).

Carapace (Figs 7 C–D, F and H) as in male, except for clypeal area smooth. Legs: chaetotaxy as in male.

Abdomen (Figs 7 C–D, F; 9A): as in male, except for lighter coloration; lateral scutum I anteriorly short, not extending beyond the posterior rim of operculum; perigenital plate broad; postepigastral scutum curved, its posterior margin overlapped with anterior margin of preanal scutum; preanal scutum regularly rectangular, width equal to 2 times length, surface covered with serrated setae.

Genitalia (Figs 9 B–C; 20B): genital area smooth; epigynal folds absent, genital basal margin sclerotized (Fig. 9B); epigynal pit small, oval, transverse; vulval stem absent; lateral horns contracted, supporting the base of vulval ducts; inner vulval plate “Ω” -shaped, slightly sclerotized, shorter and narrower than central process (Figs 9C; 20B); central process large, translucent; vulval duct wide; spermathecae large, rugose. (Fig. 20B).

Variation.

Total length from 1.14 to 1.25 in males (n = 9) and from 1.16 to 1.30 in females (n = 20).

Distribution.

Known only from the type locality (Fig. 22).