Dianattus proszynskii 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

Dianattus proszynskii C. Wang, Mi & Li sp. nov.

Figs 5 , 6

Type material.

Holotype • ♂ ( TRU -JS 0831 ), China: Yunnan: Menghai County, Menghun Township ( 21°50.6'N, 100°51.87'E, ca 1,210 m), 27. xi. 2024, H. Qiu leg. Paratypes • 2 ♂ 3 ♀ ( TRU -JS 0832 –0836), same data as for holotype ; • 1 ♂ 1 ♀ ( TRU -JS 0837 –0838), Lancang Lahu Autonomous County, Donghe Township, Dadonghe Village ( 22°58.57'N, 100°4.2'E, ca 1,650 m), 18. iii. 2024, H. Qiu leg.

Diagnosis.

The male of Dianattus proszynskii sp. nov. resembles that of Yaginumaella pilosa Żabka, 1981 , comb. rest. in having a similar palpal structure, especially the origination of the embolus, flat tegulum, and the presence of a similar process near the embolic base, but can be easily distinguished by the apically blunt retrolateral tibial apophysis and truncated anterior cymbial edge in ventral view (Fig. 5 B ) vs pointed and not truncated in Y. pilosa ( Żabka 1981: fig. 60). The female of the new species resembles that of Y. rectangula ( Yang & Peng, 2023) , comb. nov. in having a pair of epigynal hoods with similar locations and sizes, but can be easily distinguished by the path of copulatory ducts, which form arc-shaped portions on the lateral of the copulatory openings at the origin (Fig. 6 B ) vs posteriorly extending from the origin in Y. rectangula ( Yang and Peng 2023: figs 27 C, 28 B).

Description.

Male (Figs 5 A – C , 6 C, D, F, G ). Total length 4.78. Cephalothorax 2.50 long, 1.94 wide. Abdomen 2.25 long, 1.31 wide. Eye sizes and inter distances: AME 0.56, ALE 0.31, PLE 0.29, AERW 1.69, PERW 1.72, EFL 1.06. Legs: I 5.44 (1.63, 0.93, 1.45, 0.98, 0.45), II 4.69 (1.50, 0.83, 1.10, 0.83, 0.43), III 5.34 (1.70, 0.83, 1.08, 1.15, 0.58), IV 5.64 (1.68, 0.75, 1.30, 1.33, 0.58). Carapace mainly dark yellow, covered with sparse, long, dark setae and dense, much shorter orange, dark and pale setae, with pair of submarginal white setal bands; fovea longitudinal, red-brown. Chelicerae red-brown to dark, with typical dentition. Endites yellow, with pale inner portions. Labium darker than endites. Sternum yellow except central portion mingled with brown. Legs pale to red-brown, with clusters of ventral dense setae on metatarsi I, femora I, II, patellae I, II, and tibiae I, II. Dorsum of abdomen with longitudinal, central pale stripe extending across whole surface; venter dark, with pair of yellow dotted lines centrally.

Palp (Fig. 5 A – C ): tibia slightly wider than long; retrolateral tibial apophysis tapered, somewhat less than tibial length, extending upward to rather pointed tip slightly curved inward; cymbium ~ 1.25 × longer than wide, with truncated anterior edge; tegulum almost oval, flat, with half-round process near embolic base; embolus originates from ca 5: 30 o′clock position, curved ~ 1 / 2 circle, and with blunt tip.

Female (Fig. 6 A, B, E ). Total length 4.76. Cephalothorax 2.38 long, 1.82 wide. Abdomen 2.41 long, 1.52 wide. Eye sizes and inter distances: AME 0.54, ALE 0.30, PLE 0.28, AERW 1.64, PERW 1.70, EFL 1.07. Legs: I 4.33 (1.25, 0.80, 1.20, 0.63, 0.45), II 4.07 (1.20, 0.73, 1.13, 0.58, 0.43), III 4.58 (1.43, 0.75, 1.00, 0.90, 0.50), IV 5.06 (1.55, 0.73, 1.15, 1.13, 0.50). Habitus (Fig. 6 E ) similar to that of male except paler carapace without lateral, white setal bands and dorsum of abdomen with pair of posterior, round, white setal spots.

Epigyne (Fig. 6 A, B ): slightly wider than long, with pair of bell-shaped hoods opened oblique posteriorly and close to each other at anterior-most edges; atrium almost oval, anteriorly located; copulatory openings slit-shaped; copulatory ducts forming arc-shaped portions lateral to copulatory openings at origin, then curved and twisted into irregular path; spermathecae sub-spherical, touched each other; fertilization ducts almost transversely extending.

Distribution.

Known only from the type locality in Yunnan, China (Fig. 2 ).

Etymology.

The species name is a patronym in honor of Prof. Jerzy Prószyński, who has significantly contributed to the taxonomy of salticid spiders worldwide; noun (name) in genitive case.

Figures

Figure 2. Geographical records of the new species.

Figure 5. Male palp of Dianattus proszynskii gen. et sp. nov., holotype (TRU - JS 0831). A. Palp, prolateral; B. Ditto, ventral; C. Ditto, retrolateral. Abbreviations: E = embolus, RTA = retrolateral tibial apophysis, SD = sperm duct, TP = tegular process. Scale bars: 0.1 mm.

Figure 6. Dianattus proszynskii gen. et sp. nov., male holotype (TRU - JS 0831) (C, D, F, G) and female paratype (TRU - JS 0834) (A, B, E). A. Epigyne, ventral; B. Vulva, dorsal; C, E. Habitus, dorsal; D. Ditto, ventral; F. Carapace, frontal; G. Leg I, II, retrolateral. Abbreviations: At = atrium, CD = copulatory duct, CO = copulatory opening, FD = fertilization duct, H = epigynal hood, S = spermatheca. Scale bars: 0.1 mm (A, B); 0.5 mm (C – G).