Oedothorax simianensis, Irfan & Zhang & Cai & Zhang, 2025

Irfan, Muhammad, Zhang, Chang-Cheng, Cai, Yu-Jun & Zhang, Zhi-Sheng, 2025, Four new species of Linyphiidae spiders (Arachnida: Araneae) from Jiangjin District of Chongqing, China, Zootaxa 5647 (5), pp. 435-450 : 441

Oedothorax simianensis sp. nov. (四xahe)

Figures 6 , 7 , 13

Type material. CHINA: Chongqing Mun., Jiangjin Dist., Simian Mt. Nature Reserve: Holotype ♂ (SWUC-T-LIN-35-01), Dawopu , 28°34.302′N, 106°21.15′E 1002 m a.s.l., 11.XI.2011, L.Y. Wang and Z.X. Li leg.

Etymology. The specific epithet is derived from type locality; adjective.

Diagnosis. Oedothorax simianensis sp. nov. resembles O. paludigena Simon, 1926 in having the similar unmodified cephalic region and with similar tibial apophysis in palp ( Fig. 3A–D ; Millidge 1975, figs 1–9), but can be distinguished by the distal arm tip of paracymbium (PC) bifurcated ( Fig. 6B ; vs hook-shaped); protegulum (PT) bifurcated ( Fig. 6B ; vs not bifurcated); embolus half the length of radix ( Fig. 6A ; almost as long as radix).

Description. Male (holotype, Fig. 7A, B ): total length 2.09; carapace 0.94 long, 0.67 wide, brown with gray pattern, ocular region slightly elevated, cephalic pits absent, fovea, cervical and radial grooves distinct. Clypeus 0.11 high. Chelicerae with 5 promarginal and 4 retromarginal teeth. Sternum brown, longer than wide. Ocular region black; AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.07, ALE 0.05, PME 0.5, PLE 0.06, AME–AME 0.03, PME–PME 0.08, AME–ALE, 0.02, PME–PLE 0.05, AME–PME 0.06, ALE–ALE 0.29, PLE–PLE 0.32, ALE–PLE contiguous. Length of legs: I 2.65 (0.74, 0.22, 0.68, 0.62, 0.39), II 2.41 (0.64, 0.22, 0.45, 0.48, 0.30), III 1.61 (0.64,0.22, 0.45, 0.48, 0.30), IV 2.73 (0.79, 0.23, 0.69, 0.64, 0.38). TmI 0.61. Tibial spine formula: 2-2-1-1. Opisthosoma 1.23 long, 0.72 wide, oval, greenish.

Palp ( Fig. 6A–D ). Femur unmodified, longer than both patella and tibia. Patella as long as tibia, slightly curved. Tibia with 1 retrolateral and 1 dorsal trichobothria, with 3 apophyses; dorsal tibial apophysis (DTA) somewhat triangular-shaped, with serrated margin, retrolateral tibial apophysis (RTA) wider than long with serrated margin and ventral tibial apophysis (VTA) circular, with membranous margin; distal arm of paracymbium (PC) bifurcated with blunt tips; subtegulum forming a shallow circular at the base of tegulum; tegulum (T) almost round, protegulum (PT) distinct, membranous, bifurcated; suprategulum (SPT) small, distal suprategular apophysis (DSA) distinct; embolic division simple, consisting of a radix (R) longer than wide, with anterior radical process (ARP) extending forward; embolus (E) as long as dorsal tibial apophysis, slightly curved, with bifurcated tip in ventral view.

Female. Unknown.

Distribution. Known only from the type localities in Jiangjin District, Chongqing ( Fig. 13 ).

Figures

FIGURE 3. Gonatium tridentatum sp. nov., male holotype. A Palp, prolateral view B Palp, retrolateral view C Palp, dorsal view D Palp, ventral view. Abbreviations: BPA—basal process of tibial apophysis; DSA—distal suprategular apophysis; E— embolus; EM—embolic membrane; PC—paracymbium; PT—protegulum; SPT—suprategulum; T—tegulum; TBA—tibial apophysis; TP—tailpiece.

FIGURE 6. Oedothorax simianensis sp. nov., male holotype. A Palp, prolateral view B Palp, retrolateral view C Palp, dorsal view D Palp, ventral view. Abbreviations: ARP—anterior radical process; DSA—distal suprategular apophysis; DTA—dorsal tibial apophysis; E—embolus; PC—paracymbium; PT—protegulum; R—radix; RTA—retrolateral tibial apophysis; SPT— suprategulum; ST—subtegulum; T—tegulum; VTA—ventral tibial apophysis.

FIGURE 7. Oedothorax simianensis sp. nov., male holotype (A–C) and female paratype (D, E). A Habitus, dorsal view B Habitus, ventral view.

FIGURE 13. Distribution of 1. Ceratinella brevis (Wider, 1834), 2. Gonatium tridentatum sp. nov., 3. Oedothorax simianensis sp. nov., 4. Wuliphantes dahonghaiensis sp. nov., 5. Yuelushannus baishaensis sp. nov. in Jiangjin District, Chongqing.