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.