Neoperla

Chen, Zhi-Teng & Du, Yu-Zhou, 2016, Contribution to the knowledge of Neoperla (Plecoptera: Perlidae) from Hainan Province of China, Zootaxa 4144 (2), pp. 243-252 : 251-252

Key to males of species of Neoperla from Hainan Province, China.

1. Tergum 9 with a pair of small rounded nodules medially (see figs. 85–86 in Wu 1973)...................... N. binodosa

-. Tergum 9 without above mentioned nodules................................................................ 2

2. Hemitergal process of tergum 10 very long and sharp, reaching posterior margin of tergum 8 (see figs. 110–111 in Wu 1938)........................................................................................... N. longispina

-. Hemitergal process of tergum 10 not very long and sharp, not reaching tergum 8................................... 3

3. Tergum 7 with a sub-trapezoidal process, tergum 8 with an upcurved sclerite...................................... 4

-. Tergum 7 without sub-trapezoidal process, tergum 8 without upcurved sclerite..................................... 5

4. Aedeagus curved (see fig. 4 in Yang & Yang 1995)................................................ N. hainanensis

-. Aedeagus straight, process of tergum 7 with a pair of cornuted lobes laterally (see fig. 3 in Yang & Yang 1995).. N. bicornuta

5. Aedeagus without lobes ( Figs. 3–4 )......................................................... N. minuta sp. nov.

-. Aedeagus with lobes................................................................................... 6

6. Aedeagus exhibits an S-shaped curve laterally (see figs. 3–4 in Kong et al. 2014)......................... N. bicurvata

-. Aedeagus not S-shaped................................................................................ 7

7. Aedeagus with only two small lobes ( Figs. 7–8 )........................................... N. wuzhishana sp. nov.

-. Aedeagus with more than two lobes....................................................................... 8

8. Aedeagus with an elongated ventral lobe and two small dorsal lobes (see Figs. 5–6 in Kong et al. 2014).... N. furcomaculata

-. Aedeagus with more than three lobes...................................................................... 9

9. Aedeagus with four small lobes and a large lobe (see figs. 1–2 in Kong et al. 2014).......................... N. baisha

-. Aedeagus with four small lobes and two large lobes ( Figs. 14–16 ).............................. N. sexlobata sp. nov.

Figures

FIGURES 1 – 4. Neoperla minuta, sp. nov. 1. Male head and pronotum, dorsal view; 2. Male terminalia, dorsal view; 3 – 4. Aedeagus, lateral view.

FIGURES 5 – 9. Neoperla wuzhishana, sp. nov. 5. Male head and pronotum, dorsal view; 6. Male terminalia, dorsal view; 7 – 8. Aedeagus: 7. Lateral view, 8. Dorsal view; 9. Female terminalia, ventral view.

FIGURES 12 – 16. Neoperla sexlobata, sp. nov. 12. Male head and pronotum, dorsal view; 13. Male terminalia, dorsal view; 14 – 16. Aedeagus: 14. Ventrolateral view, 15. Ventral view, 16. Dorsal view.