Oedignatha wuyong Lin & Li, 2023

Lin, Yejie, Li, Shuqiang & Pham, Dinh-Sac, 2023, Taxonomic notes on some spider species (Arachnida: Araneae) from China and Vietnam, Zoological Systematics 48 (1), pp. 1-99 : 15

Oedignatha wuyong Lin & Li , sp. nov. ( Figs 11–12 , 14A–B )

Etymology. The species is named after Wu Yong, one of the 108 outlaws in the classical Chinese literature Outlaws of the Marsh; noun in apposition.

Diagnosis. The male of the new species can be distinguished from all congeners by the dorsal retrolateral tibial apophysis being separated from the ventral retrolateral tibial apophysis and the cymbium being three times longer than wide. The female can be distinguished by the L-shaped copulatory openings.

Description. Male (holotype). Total length 4.37; carapace 2.22 long, 1.53 wide, opisthosoma 2.15 long, 1.51 wide. Eye sizes and interdistances: AME 0.10, ALE 0.11, PME 0.09, PLE 0.09, AME–AME 0.11, AME–ALE 0.15, PME–PME 0.20, PME–PLE 0.18, AME–PME 0.17, ALE–PLE 0.08. Chelicerae with three promarginal and four retromarginal teeth. Leg measurements: I 7.52 (1.95, 2.54, 1.96, 1.07), II 5.80 (1.54, 1.89, 1.46, 0.91), III 5.07 (1.38, 1.50, 1.39, 0.80), IV 7.02 (1.75, 2.13, 2.06, 1.08). Leg spination: I tibia 9pv, 8rv, metatarsus 6-6v; II tibia 7-7v, metatarsus 5pv, 4rv; III metatarsus 1pl; IV tibia 1-1v, metatarsus 1rl.

Coloration ( Fig. 14A ). Carapace, chelicerae, endites, labium and sternum dark red. Legs red-brown. Opisthosoma oval, dark red with small black spots, laterally folded, ventrum dark brown with ventral scutum covering opisthosoma. Dorsal scutum strongly sclerotized. Spinnerets short, yellow-brown.

Palp ( Fig. 11 ). Retrolateral tibial apophysis bifurcate, stout, shorter than cybium. Cybium three times longer than tibia. Tegular apophysis oblong. Conductor white, bifurcate. Embolus arising at clock 8:30 position, broad, with longitudinal groove over entire length, strongly bent at tip.

Female (IZCAS-Ar43844). Total length 4.48; carapace 1.93 long, 1.36 wide, opisthosoma 2.55 long, 1.58 wide. Eye sizes and interdistances: AME 0.09, ALE 0.09, PME 0.09, PLE 0.09, AME–AME 0.07, AME–ALE 0.09, PME–PME 0.17, PME–PLE 0.14, AME–PME 0.10, ALE–PLE 0.06. Chelicerae with three promarginal and six retromarginal teeth. Leg measurements: I 6.23 (1.62, 2.21, 1.55, 0.85), II 4.94 (1.29, 1.69, 1.24, 0.72), III 4.40 (1.16, 1.35, 1.19, 0.70), IV 6.13 (1.55, 1.97, 1.73, 0.88). Leg spination: I tibia 8-8v, metatarsus 6pv, 5rv; II tibia 7pv, 6rv, metatarsus 5-5v; IV tibia 2pv, 1rv.

Coloration ( Fig. 14B ). Similar to that of male except paler, and dorsal scutum almost covering opisthosoma.

Epigyne ( Fig. 12 ). Epigynal plate rectangular, copulatory openings wide, straight. Copulatory ducts nearly elliptical in dorsal view. Spermathecae oval, separated by less than their diameter from each other. Fertilization ducts directed at clock 2:00 position from spermathecae.

Material examined. Holotype ♂ (IZCAS-Ar43841), Vietnam: Vinh Phuc, Tam Dao National Park, Natural Forest (21.5250°N, 105.5572°E, elev. 1060 m), 11 March 2008, Dinh-Sac Pham leg. Paratypes. 3♀ (IZCAS-Ar43842–Ar43844), same data as holotype .

Distribution. Known only from the type locality.

Figures

Figure 11. Oedignatha wuyong Lin & Li, sp. nov., holotype male.A. Left palp, ventral view; B. Same, retrolateral view.Abbreviations: dRTA—dorsal retrolateral tibial apophysis; E—embolus; SD—sperm duct; TA—tegular apophysis; vRTA—ventral retrolateral tibial apophysis. Scale bars=0.01mm.

Figure 12. Oedignatha wuyong Lin & Li, sp. nov., paratype female. A. Epigyne, ventral view; B. Vulva, dorsal view. Abbreviations: CD—copulatory duct; CO—copulatory opening; FD—fertilization duct; S—spermatheca. Scale bars=0.05mm.

Figure 14. Habitus, dorsal view, male (A) and female (B–C).A–B. Oedignatha wuyong Lin & Li, sp. nov.; C. Sphingius gongsunsheng Lin & Li, sp. nov. Scale bars=0.5mm.