Sweltsa recurvata, Wu, 1938

Rehman, Abdur, Huo, Qing-Bo & Du, Yu-Zhou, 2022, A new species and new species group of Sweltsa Ricker, 1943 (Plecoptera: Chloroperlidae), Zootaxa 5154 (1), pp. 60-70 : 69

Key to the males of Sweltsa recurvata group

1 Epiproct erectile, pronotum without black medial band....................................................... 2

- Epiproct flat or rod shape, pronotum with black medial band................................................... 3

2 Epiproct basely broad and tapered to the apex; apex expanded ventrally but generally flattened laterally (figs. 11–13 in Kondratieff & Baumann 2009).................................................................... Sweltsa occidens

- Epiproct constricted sub apically, apex expanded and rounded; in lateral aspect, club-like but not flattened (figs. 18–22 in Kondratieff & Baumann 2009).................................................................. Sweltsa durfeei

3 Pronotum brown, epiproct elongate, dorsally and laterally almost parallel from base to apex, tip pointed (figs. 187–188 in Wu 1938)................................................................................. Sweltsa recurvata

- Pronotum with a broad black medial band, epiproct not as above................................................ 4

4 Head with several black spots, epiproct sclerotized, completely narrowed medially, apex rounded and tip cone-shaped (figs. 508–510 in Teslenko and Zhiltzova 2009)..................................................... Sweltsa insularis

- Head with or without black spot, epiproct slightly constricted medially........................................... 5

5 Epiproct long and narrow, tergum 9 without dumbbell-shaped brown spot........................................ 6

- Epiproct rod-shaped, tergum 9 with dumbbell-shaped brown spot............................................... 7

6 Head with broad black spot, pronotum with a black medial band; epiproct slightly constricted medially, apex leaf shape dorsally (figs. 504–506 in Teslenko and Zhiltzova 2009)................................................ Sweltsa colorata

- Head and pronotum completely brown; epiproct broad at base, constricted medially, apex wide and spoon shape dorsally (figs. 1–3 in Rehman et al. 2022).................................................................. Sweltsa ligula

7 Head with triangular black spot, pronotum with black medial stripe; epiproct rod-like, sub apically wide with a rounded tip dorsally, sub apically widened laterally (figs. 1–7 in Stark & Sivec 2009)................................ Sweltsa wui

- Head without black spot, pronotum with asymmetrical rugosities; epiproct oblong, laterally constricted almost to two-thirds, apically widened ( Figs. 1–3 )...................................................... Sweltsa lateoblonga sp. nov.

Figures

FIGURE 1. Sweltsa lateoblonga Rehman, Du & Huo sp. nov., male. A. head and pronotum; B: terminalia, dorsal view; C: terminalia, lateral view; D: terminalia, ventral view.

FIGURE 2. Sweltsa lateoblonga Rehman, Du & Huo sp. nov. A: male abdomen, dorsal view; B: female abdomen, dorsal view.

FIGURE 3. Sweltsa lateoblonga Rehman, Du & Huo sp. nov., male. A and B: epiproct, dorsal view; C and D, lateral view.