Suwallia rostrata Zhang, Li & Li 2024, sp. nov.
Creators: name: Zhang, Yao
name: Wang, Bingli
name: Yao, Gang
name: Li, Wenliang
name: Li, Weihai
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Chloroperlidae
Suwallia
Suwallia rostrata

description: Suwallia rostrata Zhang, Li & Li, sp. nov.
(Figs. 1–4)
Material examined. Holotype male (IZCAS): China, Xizang, Linzhi City, N 29.6836°, E 94.3379°, 3000 m, 1983.VIII.9, leg. Zai Lin.
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). 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).
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). Hemitergal processes sclerotized, with tiny hairs at the base, finger-shaped with slightly tapering apex and curved upward (Figs. 1c, 2a). Epiproct membranous, finger-like, covered with short hairs (Figs. 3a, 4c). Subgenital plate well developed and elliptical, posterior margin slightly produced (Fig. 2c). Aedeagus mostly membranous, generally triangular in lateral view (Figs. 2a, 4c); paired basoventral lobes distinct, covered with scales and transverse wrinkles (Figs. 4a, 4c); mesoventral lobes membranous and bald (Figs. 4a–4b); dorsal lobe is beak-like in lateral view, and bears many longitudinal wrinkles (Figs. 2b, 3a–3f, 4c–4d); a median sclerotized band present near mesoventral lobes (Fig. 4c); ventral surface brownish, bears dense scales or wrinkles before a brown transverse ridge (Figs. 4a–4b).
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.
description: Published as part of Zhang, Yao, Wang, Bingli, Yao, Gang, Li, Wenliang & Li, Weihai, 2024, A new species and three records of Chloroperlidae (Plecoptera) from China, pp. 373-382 in Zootaxa 5406 (2) on page 374, DOI: 10.11646/zootaxa.5406.2.9, http://zenodo.org/record/10618494