Suwallia rostrata Zhang, Li & Li, 2024

Zhang, Yao, Wang, Bingli, Yao, Gang, Li, Wenliang & Li, Weihai, 2024, A new species and three records of Chloroperlidae (Plecoptera) from China, Zootaxa 5406 (2), pp. 373-382 : 374

publication ID	https://doi.org/ 10.11646/zootaxa.5406.2.9
publication LSID	lsid:zoobank.org:pub:556BDFB0-8134-434F-A975-79210FBF026B
DOI	https://doi.org/10.5281/zenodo.10618423
persistent identifier	https://treatment.plazi.org/id/03A5A139-7603-2F71-FF2C-BD88A0EDFA17
treatment provided by	Plazi
scientific name	Suwallia rostrata Zhang, Li & Li
status	sp. nov.

Treatment

Suwallia rostrata Zhang, Li & Li , sp. nov.

( Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 )

Material examined. Holotype male ( IZCAS): China, Xizang, Linzhi City , N 29.6836°, E 94.3379°, 3000 m, 1983.VIII.9, leg. Zai Lin. GoogleMaps

Adult habitus. Triocellate. General body color yellowish-brown in alcohol. Head yellowish-brown with brown marking covering ocellar triangle and frons, antenna brownish. Pronotum disc dark brown with a thin T-shaped darker median stripe and V-shaped black mesolateral markings ( Fig. 1a View FIGURE 1 ). Legs yellowish-brown, wings brownish with brown venation. Abdominal terga II–VII with a wide medial trapezoidal dark brown stripe, the stripe slightly constricted medially on terga V–VII, stripe of terga VIII–IX reduced anteriorly ( Fig. 1b View FIGURE 1 ).

Male terminalia. Tergum IX concave anteromedially, with posteromedial extension, posterior portion covered with thicker hairs except for the extension. Tergum X divided, median portion with a distinct turtle-like dark brown sclerite in dorsal view ( Fig. 1c View FIGURE 1 ). Hemitergal processes sclerotized, with tiny hairs at the base, finger-shaped with slightly tapering apex and curved upward ( Figs. 1c View FIGURE 1 , 2a View FIGURE 2 ). Epiproct membranous, finger-like, covered with short hairs ( Figs. 3a View FIGURE 3 , 4c View FIGURE 4 ). Subgenital plate well developed and elliptical, posterior margin slightly produced ( Fig. 2c View FIGURE 2 ). Aedeagus mostly membranous, generally triangular in lateral view ( Figs. 2a View FIGURE 2 , 4c View FIGURE 4 ); paired basoventral lobes distinct, covered with scales and transverse wrinkles ( Figs. 4a, 4c View FIGURE 4 ); mesoventral lobes membranous and bald ( Figs. 4a–4b View FIGURE 4 ); dorsal lobe is beak-like in lateral view, and bears many longitudinal wrinkles ( Figs. 2b View FIGURE 2 , 3a–3f View FIGURE 3 , 4c–4d View FIGURE 4 ); a median sclerotized band present near mesoventral lobes ( Fig. 4c View FIGURE 4 ); ventral surface brownish, bears dense scales or wrinkles before a brown transverse ridge ( Figs. 4a–4b View FIGURE 4 ).

Female: Unknown.

Larva and egg. Unknown.

Distribution. China (Xizang).

Etymology. The species name refers to the beak shaped dorsal lobe of aedeagus in lateral aspect (Latin word rostratus means beaked).

Remarks. The new species was collected from banks of a large, braided river called Nyang Qu River. The median sclerite between the hemitergal processes of the new species is similar to that of Suwallia dengba Rehman, Huo & Du, 2022 . However, they are different in the following features: the new species has a dark brown pronotum disc, while the pronotum disc of S. dengba is paler; the aedeagus of S. dengba bears a distinctly sclerotized eagleshaped sclerite, whereas the new species lacks the aedeagal sclerite but instead has many wrinkles; S. rostrata has distinct aedeagal basoventral and mesoventral lobes which are not found in S. dengba ; finally, the epiproct of new species is finger-like, while in S. dengba the epiproct is knob-like. The new species also has a similar median sclerite to S. talalajensis Zhiltzova, 1976 , however it can be easily distinguished by the dark brown pronotum disc, apical wrinkles of the aedeagus and the finger-like epiproct. In S. talalajensis , the pronotum is paler; the aedeagus is membranous without wrinkles or sclerites; the epiproct is elliptical.