Sudesna haiboi, Wang & Peng & Zhang, 2025

Sudesna haiboi sp. nov.

Figs 5 View Figure 5 , 6 View Figure 6 , 15 (海波苏蛛 View Figure 15 )

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. GoogleMaps Paratypes: 9 ♂ 10 ♀ ( SWUC -T-DI-16-02 to 20); same data as holotype GoogleMaps .

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 View Figure 11 , 12 View Figure 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 View Figure 5 , 6 C – E View Figure 6 ), and long, curved copulatory ducts (vs short and straight) (Figs 5 E View Figure 5 , 6 G View Figure 6 ).

Description.

Male holotype (Fig. 6 A View Figure 6 ) 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 View Figure 5 , 6 C – E View Figure 6 ). 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 View Figure 6 ) 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 View Figure 5 , 6 F, G View Figure 6 ). 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 View Figure 15 ).