Riseveinus, Li & Wang, 1995

Gou, Guangli & Xing, Jichun, 2024, Key to species of the genus Riseveinus Li & Wang, 1995 (Hemiptera: Cicadellidae: Evacanthinae) with description of a new species, Zootaxa 5399 (3), pp. 296-300 : 297

Key to species (males) of the genus Riseveinus

1. Head elongate, longer than length of pronotum and scutellum together.................................. R. albiveinus

- Head about as long as or shorter than pronotum and scutellum together........................................... 2

2. Aedeagus without ventral process........................................................................ 3

- Aedeagus with ventral process........................................................................... 6

3. Aedeagus with small-spiculate lateral process....................................................... R. spinatus

- Aedeagus without lateral process......................................................................... 4

4. Aedeagal shaft broad at base, tapered to apex in lateral view, without pair of apical processes; dorsal apodeme with unpaired, bilobed, lamellate process, and asymmetrically curved process, longer than shaft, with compressed apex.... R. asymmetricus

- Aedeagal shaft long and slender in lateral view, with pair of slender apical processes................................ 5

5. Aedeagus with apical processes shorter than ⅔ length of shaft; dorsal apodeme with bilobed lateral extensions crossing aedeagal shaft in lateral view....................................................................... R. cervcornutus

- Aedeagus with apical processes longer than ⅔ length of shaft; dorsal apodeme with bilobed lateral extensions not crossing aedeagal shaft in lateral view............................................................ R. elongatus sp. nov.

6. Aedeagus with unpaired ventral process....................................................... R. baoshanensis

- Aedeagus with pair of ventrolateral process................................................................ 7

7. Aedeagus ventrolateral process longer than aedeagal shaft..................................................... 8

- Aedeagus ventrolateral process shorter than aedeagal shaft.................................................... 9

8. Aedeagus with pair of slender apical processes................................................. R. chiabaotawow Aedeagus without pair of slender apical processes.................................................... R. sinensis

9. Aedeagus with pair of slender apical processes, anal tube without ventral process................................. 10

- Aedeagus without apical processes, anal tube with barblike ventral process............................... R. hamatus

10. Aedeagus ventrolateral process stout, and well separated from aedeagal shaft in caudo-ventral view; shaft apex inflated in caudo-ventral view.......................................................................... R. tenuispinus

- Aedeagus ventrolateral process slender, and close to aedeagal shaft in caudo-ventral view; shaft with parallel sided in caudo-ventral view............................................................................... R. compressus