Sweltsa, Ricker, 1943

Zhi-Teng Chen & Yu-Zhou Du, 2017, A new species of Sweltsa (Plecoptera: Chloroperlidae) from China, with a key to the Sweltsa males of China, Zootaxa 4337 (2), pp. 291-293 : 292

Key to males of species of Sweltsa from China.

1. Tergum 9 with a transverse ridge ( Figs. 4–5 ).................................................................................................................................... 3

-. Tergum 9 without a transverse ridge ................................................................................................................................................. 2

2. Epiproct apex narrower than base (see figs. 187–188 in Wu (1938)).............................................................................. S. recurvata

-. Epiproct apex as wide as or wider than the base (see figs. 5–8 in Stark & Sivec (2009))........................................................ S. wui

3. Epiproct apex with a hook ( Figs. 4–7 ) .................................................................................................................. S. hamula sp. nov.

-. Epiproct apex lacking a hook ............................................................................................................................................................ 4

4. Epiproct apex wide and rounded (see figs. 3–4 in Tierno de Figueroa & Fochetti (2002)) ................................................ S. yunnan

-. Epiproct apex narrow and not rounded ............................................................................................................................................. 5

5. Epiproct apex with an upturned, tongue-like cap (see figs. 8–11 in Li et al. (2014))................................................. S. baiyunshana

-. Epiproct apex unmodified, without a upturned, tongue-like cap (see figs. 18–25 in Li et al. (2014)) ........................... S. longistyla

Figures

FIGURES 1 – 9. Sweltsa hamula, sp. nov., holotype. 1. Male habitus, dorsal view; 2. Male head and pronotum, dorsal view; 3. Wings; 4. Male terminalia, dorsal view; 5. Male terminalia, dorsolateral view; 6. Epiproct, dorsal view; 7. Epiproct, lateral view; 8. Aedeagus, ventral view; 9. Male terminalia, ventral view.