Luzonacera duan Li & Li, 2017

Liu, Chang, Li, Fengyuan, Li, Shuqiang & Zheng, Guo, 2017, Five new genera of the subfamily Psilodercinae (Araneae: Ochyroceratidae) from Southeast Asia, Zoological Systematics 42 (4), pp. 395-417 : 400

Luzonacera duan Li & Li , sp. nov. ( Figs 3–4 , 15 )

Material examined. Holotype male, Philippines, Luzon Island, Kalinga Province, Tabuk City , Pasil Area , Road to Lubuagan Village , rainforest on a steep slope, in humid litter (17º22.490’N, 121º10.864’E; elev. 915 m), 02 June 2015, leg. F. Ballarin & Y. Li. Paratypes. 2 females, same data as holotype ( IZCAS) .

Etymology. The species name is a noun in apposition derived from the Chinese pinyin "duǎn" ("short") and refers to the relatively short embolus.

Diagnosis. Both sexes of the two species of Luzonacera gen. nov. are very similar; distinguishing them is discussed under L. chang Li & Li , sp. nov.

Description. Male (holotype). Total length 3.48; carapace 0.95 long, 0.98 wide; abdomen 2.10 long, 0.69 wide. Carapace round, pink, with three longitudinal brown bands of which middle three times wider than laterals ( Fig. 4C ). Fovea shallow, brown. Anterior margin of thoracic region distinctly elevated. Chelicerae brown with lamina, promargin with one tooth, retromargin with two small teeth, posterior surface of fang with 22 small denticles. Clypeus slanting, brown with two pale rounded areas laterally. Labium slanting, brown. Sternum yellow, with complex patterns. Abdomen elongate, with complex patterns dorsally and ventrally. Legs brown, with white annulation; measurements: I 15.10 (4.50, 0.40, 4.20, 4.70, 1.30), II 11.48 (3.28, 0.38, 3.20, 3.52, 1.10), III 7.63 (2.25, 0.34, 2.18, 1.96, 0.90), IV 12.15 (3.68, 0.38, 3.44, 3.52, 1.13). Palp ( Figs 3 A–D): tibia remarkably swollen; cymbium with distal protrusion; bulb light yellow, pyriform; conductor lacking, embolus a relatively short spiral extending subapically from bulb.

Female. Similar to male in coloration and general features but slightly smaller ( Figs 4 D–E). Measurements: total length 2.97; carapace 0.88 long, 0.88 wide; abdomen 1.70 long, 1.14 wide. Leg measurements: I - (3.32, 0.32, 3.40, 3.60, -), II missing, III 6.29 (1.76, 0.31, 1.78, 1.62, 0.82), IV 8.22 (2.72, 0.34, 2.72, 1.62, 0.82). Vulva with two pairs of elongate, distally swollen spermathecae ( Fig. 4A ).

Distribution. Known only from the type locality ( Fig. 15 ).

Figures

Figure 3. Luzonacera duan Li & Li, sp. nov., male holotype. A. Palp, ventral view. B. Palpal bulb, prolateral view. C. Palp, prolateral view. D. Palp, retrolateral view. Scale bars: B–D=0.1mm.

Figure 4. Luzonacera duan Li & Li, sp. nov., male holotype and female paratype. A. Spermathecae, dorsal view. B. Female epigyne, ventral view. C. Male habitus, dorsal view. D. Female habitus, dorsal view. E. Female habitus, ventral view. Scale bars: A=0.05mm; C–E=0.5mm.

Figure 15. Known distribution of six new ochyroceratids from Southeast Asia. 1. Sinoderces nawanenis Li & Li, sp.nov. 2. Qiongocera hongjunensis Li & Li, sp. nov. 3. Relictocera qiyi Li & Li, sp. nov. 4. Luzonacera duan Li & Li, sp. nov. 5. Luzonacera chang Li & Li, sp. nov. 6. Thaiderces jian Li & Li, sp. nov.