Sudesna haiboi Wang, Peng & Zhang, 2025, sp. nov.
Creators: name: Wang, Lu-Yu
name: Peng, Xian-Jin
name: Zhang, Zhi-Sheng
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Dictynidae
Sudesna
Sudesna haiboi

description: Sudesna haiboi sp. nov.
Figs 5, 6, 15 (海波苏蛛)
Type materials.
Holotype ♂ (SWUC -T-DI-16-01); Yunnan Province; Dali City, Mount Cangshan, Southern Slopes; 25°34′27″N, 100°7′49″E; elev. 2320 m; May 2010; H. B. Pu and Z. Z. Yang leg. Paratypes: 9 ♂ 10 ♀ (SWUC -T-DI-16-02 to 20); same data as holotype.
Etymology.
The specific name honours Mr Haibo Pu, who was of tremendous assistance in the field; a noun in genitive case.
Diagnosis.
This species is similar to S. shangrila sp. nov. (Figs 11, 12) in having a hook-shaped retrolateral tibial apophysis, a long anterior arm of conductor, and cylindrical spermatheca, but it can be distinguished by the embolus originating at about the 8: 30 o’clock position (vs 9: 30), the lack of a scaly tip on the posterior arm of the conductor (vs present) (Figs 5 A – C, 6 C – E), and long, curved copulatory ducts (vs short and straight) (Figs 5 E, 6 G).
Description.
Male holotype (Fig. 6 A) total length 2.01. Prosoma 0.94 long, 0.87 wide; opisthosoma 1.14 long, 0.76 wide. Dorsum of prosoma brown, with high cephalic area. Eye sizes and interdistances: AME 0.05, ALE 0.05, PME 0.06, PLE, 0.07; AME – AME 0.08, AME – ALE 0.07, PME – PME 0.09, PME – PLE 0.08, ALE – PLE 0.01. MOA 0.16 long, anterior width 0.16, posterior width 0.19. Clypeus height 0.12. Chelicerae stout, brown, with 3 promarginal teeth and 1 retromarginal tooth. Legs yellow-brown. Leg measurements: I 3.45 (1.09, 1.12, 0.80, 0.44), II 3.34 (1.05, 1.08, 0.78, 0.44), III 2.51 (0.79, 0.77, 0.60, 0.35), IV 2.72 (0.83, 0.87, 0.67, 0.35). Leg formula: 1243. Opisthosoma oval. Dorsum yellowish brown, with black and white markings. Venter yellow-brown. Spinnerets short and yellow-brown, with black markings.
Palp (Figs 5 A, B, 6 C – E). Tibia dorsally with two ctenidia, located 1 / 3 from distal-most portion of tibia. Retrolateral tibia apophysis hook-shaped. Embolus somewhat O-shaped, originating at about the 8: 30 o’clock position and terminating at about the 5: 30 o’clock position. Anterior arm of conductor (AA) tapering and terminating at about the 1: 00 o’clock position; posterior arm (PA) spiral, with blunt tip.
Female paratype (SWUC -T-DI-16-02, Fig. 6 B) total length 2.27. Prosoma 0.82 long, 0.83 wide; opisthosoma 1.54 long, 1.27 wide. Dorsum of prosoma yellow-brown, with high cephalic area. Eye sizes and interdistances: AME 0.04, ALE 0.06, PME 0.05, PLE 0.05; AME – AME 0.08, AME – ALE 0.05, PME – PME 0.08, PME – PLE 0.09, ALE – PLE 0.02. MOA 0.14 long, anterior width 0.14, posterior width 0.16. Clypeus height 0.06. Legs yellow-brown. Leg measurements: I 2.96 (0.95, 0.95, 0.67, 0.39), II 2.86 (0.92, 0.92, 0.64, 0.38), III 2.39 (0.77, 0.75, 0.55, 0.32), IV 2.62 (0.82, 0.86, 0.63, 0.31). Leg formula: 1243. Opisthosoma oval. Dorsum yellowish brown, with a few black markings and lots of white scaly markings. Venter yellowish brown. Spinnerets short and yellow-brown, with black markings.
Epigyne (Figs 5 C, D, 6 F, G). Copulatory openings nearly 9 - shaped, facing away from each other, separated by about 2.5 times their width. Copulatory ducts long, membranous, semicircular. Spermatheca spiral; spermathecal heads oval. Fertilization ducts semicircular, laterally directed and as long as width of copulatory openings.
Variation.
Male (n = 10) total length 1.92–2.10; female (n = 10) total length 2.15–2.35.
Distribution.
Known only from the type locality, Yunnan, China (Fig. 15).
description: Published as part of Wang, Lu-Yu, Peng, Xian-Jin & Zhang, Zhi-Sheng, 2025, Six new species and a new synonym of the mesh-web spider genus Sudesna Lehtinen, 1967 (Araneae, Dictynidae) from China, pp. 127-149 in ZooKeys 1234 on pages 127-149, DOI: 10.3897/zookeys.1234.145300