Yaginumaella medog C. Wang, Mi & Li, 2025

Wang, Cheng, Wang, Ying, Mi, Xiaoqi & Li, Shuqiang, 2025, Description of two new genera and seven new species of Plexippina Simon, 1901 (Araneae, Salticidae, Plexippini) from Southwest China, with a review of Yaginumaella Prószyński, 1979, ZooKeys 1257, pp. 215-247 : 215-247

Yaginumaella medog C. Wang, Mi & Li sp. nov.

Figs 9 , 10

Type material.

Holotype • ♂ ( TRU -JS 0841 ), China: Xizang Autonomous Region: Medog County, around Renqingbeng Temple ( 29°18.31'N, 95°21.29'E, ca 1,970 m), 26. v. 2024, X. Q. Mi et al. Leg . Paratypes • 2 ♂ 2 ♀ ( TRU -JS 0842 –0845), same data as for holotype .

Diagnosis.

The male of Yaginumaella medog sp. nov. is unique for having two retromarginal cheliceral teeth. It somewhat resembles that of Y. urbanii Żabka, 1981 , comb. rest. in having a very similar palpal structure, especially the origination of the embolus, but differs in: 1) the embolus is weakly sclerotized at the distal 1 / 3 (Fig. 9 B ) vs strongly sclerotized in Y. urbanii ( Yu et al. 2024: fig. 6 A); 2) the posterior tegular lobe is nearly round (Fig. 9 B ) vs sub-triangular in Y. urbanii ( Yu et al. 2024: figs 6 A, 7 A). The female resembles that of Y. nova Żabka, 1981 , comb. rest. in having a very similar epigynal structure, but differs in: 1) the distance between epigynal hoods is almost as wide as the atrium (Fig. 10 A, B ) vs ~ 1.2 × wider than the atrium in Y. nova ( Żabka 1981: fig. 44); 2) the copulatory ducts are enlarged into balls medially (Fig. 10 A, B ) vs not enlarged in Y. nova ( Żabka 1981: figs 44, 45).

Description.

Male (Figs 9 A – C , 10 E, G – I ). Total length 4.48. Cephalothorax 2.27 long, 1.88 wide. Abdomen 2.23 long, 1.36 wide. Eye sizes and inter distances: AME 0.49, ALE 0.28, PLE 0.25, AERW 1.58, PERW 1.52, EFL 1.06. Legs: I 5.62 (1.63, 0.95, 1.43, 0.98, 0.63), II 4.59 (1.45, 0.75, 1.13, 0.78, 0.48), III 5.41 (1.63, 0.78, 1.25, 1.20, 0.55), IV 5.54 (1.63, 0.78, 1.28, 1.30, 0.55). Carapace mainly dark brown, covered with dense dark and golden setae, with pair of lateral submarginal pale setal bands; fovea dark red, linear. Chelicerae with three promarginal and two retromarginal teeth. Endites pale, with cluster of dense dark setae on disto-inner portions. Labium dark brown except distal portion pale. Sternum dark brown, ~ 1.2 × longer than wide. Legs pale to brown, spiny. Dorsum of abdomen with pale longitudinal patch distally across with much thinner, transverse pale stripe; venter mainly pale, with central, longitudinal, dark patch and irregular dark spots.

Palp (Fig. 9 A – C ): tibia ~ 1.56 × longer than wide in ventral view, with straight retrolateral apophysis tapered to pointed tip directed upward in retrolateral view; cymbium ~ 1.43 × longer than wide, setose; tegulum flat, with almost round posterior lobe; embolus originates from ca 9 o′clock position, curved ~ 1 / 4 circle, distal 1 / 3 weakly sclerotized.

Female (Fig. 10 A – D, F ). Total length 4.58. Cephalothorax 2.00 long, 1.61 wide. Abdomen 2.52 long, 1.73 wide. Eye sizes and inter distances: AME 0.48, ALE 0.28, PLE 0.25, AERW 1.55, PERW 1.48, EFL 1.06. Legs: I 3.83 (1.20, 0.70, 0.85, 0.63, 0.45), II 3.63 (1.10, 0.70, 0.80, 0.60, 0.43), III 4.54 (1.33, 0.73, 0.95, 0.98, 0.55), IV 4.84 (1.38, 0.70, 1.08, 1.13, 0.55). Habitus (Fig. 10 F ) similar to that of male except with pale, longitudinal, thoracal stripe and only with two promarginal cheliceral teeth and one retromarginal tooth.

Epigyne (Fig. 10 A – D ): with pair of almost bell-shaped hoods posterior to base of copulatory openings; atrium nearly oval, anteromedially located; copulatory openings slit-shaped, beneath posterolateral portion of atrium; copulatory ducts curved into almost C-shape at origin, and then slightly enlarged into balls and continue to connect to elongate-oval spermathecae; fertilization ducts originate from anterior-most edges of spermathecae.

Distribution.

Know only from the type locality in Xizang, China (Fig. 2 ).

Etymology.

The specific name is after the type locality, Medog County; noun in apposition.

Figures

Figure 2. Geographical records of the new species.

Figure 9. Male palp of Yaginumaella medog sp. nov., holotype (TRU - JS 0841). A. Palp, prolateral; B. Ditto, ventral; C. Ditto, retrolateral. Abbreviations: E = embolus, RTA = retrolateral tibial apophysis, PL = posterior tegular lobe, SD = sperm duct. Scale bars: 0.1 mm.

Figure 10. Yaginumaella medog sp. nov., male holotype (TRU - JS 0841) (E, G – I), female paratype (TRU - JS 0844) (A, C, F) and female paratype (TRU - JS 0845) (B, D). A, B. Epigyne, ventral; C, D. Vulva, dorsal; E, F. Habitus, dorsal; G. Ditto, ventral; H. Carapace, frontal; I. Chelicera, posterior. Abbreviations: At = atrium, CD = copulatory duct, CO = copulatory opening, FD = fertilization duct, H = epigynal hood, S = spermatheca. Scale bars: 0.1 mm (A – D); 0.2 mm (I); 0.5 mm (E – H).