Yaginumaella luoi Wang & Mi, 2025

Yaginumaella luoi Wang & Mi , sp. nov.

Figures 3A–C View FIGURE 3 , 4A–G View FIGURE 4

Type material. Holotype: ♂ ( TRU-JS 0857 ), CHINA: Xizang Autonomous Region: Gyirong County, Gyirong Township , Jiang Village ( 28°19.31'N, 85°20.75'E, 2310 m a.s.l.), 26.V.2025, leg. X.Q. Mi et al. GoogleMaps

Paratypes: 3♂ 4♀ ( TRU-JS 0858–0864 ), same data as for holotype GoogleMaps .

Etymology. The species is named after one of the collectors, Mr Shenghang Luo; noun (name) in genitive case.

Diagnosis. The male of Yaginumaella luoi sp. nov. resembles that of Ptocasius falcatus ( Zhu, Zhang, Zhang & Chen, 2005) in having a very similar palpal structure, especially the origin of the embolus and the shape of the retrolateral tibial apophysis, but differs by: (1) the anterior cymbial edge being truncated ( Fig. 3B, C View FIGURE 3 ) vs arc-shaped in P. falcatus ( Zhu et al. 2005: fig. 13D, E); and (2) the posterior tegular lobe has a V-shaped edge ( Fig. 3B View FIGURE 3 ) vs arc-shaped in P. falcatus ( Zhu et al. 2005: fig. 13D). The female of this new species is similar to P. orientalis ( Żabka, 1981) in the general shape of the epigyne, but can be distinguished by the following aspects: (1) the copulatory ducts are straight at their origin ( Fig. 4B View FIGURE 4 ) vs curved to almost C-shapes in P. orientalis ( Żabka 1981: fig. 51); and (2) the epigynal hoods are as long as wide, and are directed towards the center of the atrium at the distal end ( Fig. 4A View FIGURE 4 ) vs ca. two times wider than long, with the distal ends almost directed upward in P. orientalis ( Żabka 1981: fig. 50).

Description. Male ( holotype, Figs 3A–C View FIGURE 3 , 4C, D, F, G View FIGURE 4 ). Total length 4.22. Carapace 2.07 long, 2.13 wide. Abdomen 2.10 long, 1.43 wide. Eye sizes and interdistances: AME 0.47, ALE 0.25, PLE 0.21, AERW 1.45, PERW 1.38, EFL 0.99. Legs: I 4.96 (1.45, 0.85, 1.20, 0.88, 0.58), II 4.08 (1.28, 0.70, 0.90, 0.68, 0.52), III 4.71 (1.48, 0.70, 1.00, 1.00, 0.53), IV 4.92 (1.48, 0.65, 1.13, 1.13, 0.53). Carapace red brown to dark brown, covered with dense dark, white and golden scales, with pair of lateral white stripes formed by white scales; fovea linear, dark red. Chelicerae with typical dentition. Endites widened distally, with pale disto-inner portions and dense dark disto-inner marginal setae. Labium dark brown. Sternum yellow to dark yellow, covered with brown thin setae, about 1.2 times longer than wide. Legs pale to dark brown, spiny. Dorsum of abdomen mainly dark, spotted, covered with dark and golden setae, with central, longitudinal grey-yellow patch about half abdominal width and bifurcated to two lateral, transverse rami bearing white scales; venter brown, with irregular dark patches.

Palp ( Fig. 3A–C View FIGURE 3 ): tibia almost as long as wide in ventral view; retrolateral tibial apophysis tapered, curved distally, with blunt tip directed towards about 01:30 position in retrolateral view; cymbium about 1.3 times longer than wide, with truncated anterior edge; tegulum swollen posteriorly, with subtriangular posterior lobe extending downward; embolus originates from about 06:30 position, curved about 1/4 circle along prolateral tegular margin and then antero-retrolaterally, extending to rather pointed tip.

Female (TRU-JS 0861, Fig. 4A, B, E View FIGURE 4 ). Total length 5.07. Carapace 2.52 long, 1.87 wide. Abdomen 2.66 long, 1.87 wide. Eye sizes and interdistances: AME 0.49, ALE 0.30, PLE 0.26, AERW 1.66, PERW 1.66, EFL 1.12. Legs: I 4.48 (1.40, 0.80, 1.00, 0.75, 0.53), II 4.08 (1.33, 0.73, 0.88, 0.65, 0.49), III 5.01 (1.58, 0.75, 1.00, 1.13, 0.55), IV 5.49 (1.68, 0.75, 1.18, 1.33, 0.55). Habitus ( Fig. 4E View FIGURE 4 ) similar to that of male except carapace paler in color and with central, yellow stripe extending through thorax.

Epigyne ( Fig. 4A, B View FIGURE 4 ): almost as long as wide, with pair of hoods posterior to lowest portion of atrium and far away from each other, about 2/5 atrial width; atrium nearly oval, anteriorly located; copulatory openings slit-shaped, beneath lateral portions of atrium; copulatory ducts flat, and almost curved to V-shapes; spermathecae without distinct border; fertilization ducts originating from anterior-most portions of spermathecae.

Distribution. Known only from the type locality in Xizang, China ( Fig. 9 View FIGURE 9 ).