Rhopalopsole yadonga, Chen & Wang & Li, 2022

Chen, Jing, Wang, Hongliang & Li, Weihai, 2022, Two new species of the genus Rhopalopsole (Plecoptera: Leuctridae) from China, Zootaxa 5129 (4), pp. 569-578 : 570-577

publication ID	https://doi.org/ 10.11646/zootaxa.5129.4.6
publication LSID	lsid:zoobank.org:pub:33937283-4EF4-430C-A1E7-6CD00FB8F404
DOI	https://doi.org/10.5281/zenodo.6504215
persistent identifier	https://treatment.plazi.org/id/0398878D-FFAB-FFCD-FF38-5B0E271128C7
treatment provided by	Plazi
scientific name	Rhopalopsole yadonga
status	sp. nov.

Treatment

Rhopalopsole yadonga View in CoL sp. nov.

( Figs. 3–6 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 & 7b View FIGURE 7 )

Male. Forewing length 6.5–7.0 mm (n=4). Head black ( Fig. 3a View FIGURE 3 ), slightly wider than pronotum; compound eyes dark brown; antennae ( Fig. 7b View FIGURE 7 ) dark brown, inner margin with long hairs. Pronotum ( Fig. 3a View FIGURE 3 ) brown, surface with dark brown longitudinal median and paramedial elliptical rugosities, anterior corners rounded, posterior corners angulate; wings subhyaline, veins brown; legs brown. Abdomen brown, terminalia mostly dark brown.

Terminalia. Tergum 9 ( Figs. 3b View FIGURE 3 , 4a View FIGURE 4 , 5b View FIGURE 5 ) heavily sclerotized except medial portion anterior to a pair of darkly sclerotized transverse bands at posterior margin, the bands generally rectangular and covered by dense scales; Sternum 9 ( Figs. 3c View FIGURE 3 & 4b View FIGURE 4 ) longer than wide and rounded apically, basally with densely hirsute oval vesicle on a short pedicel. Tergum 10 ( Figs. 3b View FIGURE 3 , 4a View FIGURE 4 , 5a, 5d View FIGURE 5 ) central plate subquadrate, with three darkly sclerotized separated sclerites, the mesal sclerite covered by sparse scales; transverse bars anteromedially darkened and thickened, with anterior portion projecting inward, posterior margins forming strongly sclerotized stripe. Lateral projections ( Figs. 3d View FIGURE 3 , 4c View FIGURE 4 , 5c View FIGURE 5 ) sclerotized, a rounded plate basally, wider than long in lateral view, and inner margin of the projections enlarged apically and appearing as a bilobed tip in dorsal view, in lateral view the upper lobe forming circular notch with the lower point. Cercus ( Figs. 3b–3d View FIGURE 3 , 4a–4c View FIGURE 4 ) hirsute and upcurved medially, without apical spine. Epiproct ( Figs. 3b View FIGURE 3 , 4a View FIGURE 4 , 5d View FIGURE 5 ) hook like, regularly tapering to apex. Subanal lobes ( Figs. 3b–3c View FIGURE 3 , 4a–4c View FIGURE 4 , 5a, 5c View FIGURE 5 ) of large size, distinctly sclerotized, strongly upcurved apically, in ventral aspect apices are trilobed; in top view, the middle portion forming two bipartite lobes.

Female. Forewing length 6.5–7.5 mm (n=3). Subgenital plate ( Fig. 6a View FIGURE 6 ) posteriorly produced into a semicircular lobe with an unsclerified triangular membrane medially in ventral view, and the lobe slightly bulging in lateral view ( Fig. 6b View FIGURE 6 ). Sternum 8 with a pair of narrowly separately triangular sclerites, the anterior margin nearly overlapping with the posterior margin of subgenital plate.

Type Material. Holotype male ( CAU): China, Tibet Autonomous Region, Yadong County, 27.4979° N, 88.9219° E, 3400 m, 12-VII-2018, leg. Liang Wang. GoogleMaps Paratypes: 3 males, 2 females ( HIST) , 1 male, 1 female ( CAU), same data as holotype GoogleMaps .

Etymology. This specific name refers to the county from which it was collected.

Distribution. China, Tibet Autonomous Region.

Remarks. Rhopalopsole yadonga is a member of the R. magnicerca group as defined by Sivec et al. (2008), the group having on tergum 9 a pair of strongly sclerotized transverse bars that are covered in small, rounded knobs or scales. The new species can be easily distinguished from other members of the group by the inner margin of the lateral projections of tergum 10 being enlarged and incised apically. Additionally, the subgenital plate in females is similar to R. longispina Yang & Yang, 1991 of the R. magnicerca species group (see figs. 43 & 44, Li & Yang, 2012). The subgenital plate in the new species has a much wider subgenital plate ( Fig. 6a View FIGURE 6 ); sclerites of sternum 8 are triangular and narrowly separated whereas those of R. longispina are L-shaped and widely separated.