Four new species of the leafhopper genus Riseveinus Li (Hemiptera: Cicadellidae: Evacanthinae) from China and Thailand Author Wang, Yang Author Dietrich, Christopher H. Author Zhang, Yalin text Zootaxa 2018 2018-10-31 4508 2 259 266 journal article 28046 10.11646/zootaxa.4508.2.8 71421820-a02b-4fef-a8b6-e8b216c3e8f1 1175-5326 2607072 3375CF8C-7952-4CF5-8E39-09DE2197119D Key to species of Riseveinus Li, 1995 (males) 1. Head elongate, longer than combined length of pronotum and scutellum............................. R. albiveinus (Li) - Head length less than or equal to combined length of pronotum and scutellum..................................... 2 2 Aedeagus without ventral process......................................................................... 3 - Aedeagus with ventral process........................................................................... 5 3 Aedeagus with small-spiculate lateral process ( Fig. 24 )......................................... R. spinatus sp. nov. - Aedeagus without lateral process......................................................................... 4 4 Aedeagal shaft long and slender in lateral view, with pair of slender apical processes; dorsal apodeme with bilobed lateral extensions ( Figs 8, 9 )............................................................... R. cervcornutus sp. nov. - Aedeagal shaft 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 Zhang, Zhang & Wei 5. Aedeagus with unpaired ventral process................................................. R. baoshanensis Li & Li - Aedeagus with pair of ventrolateral process................................................................. 6 6. Aedeagus ventrolateral process longer than aedeagal shaft..................................................... 7 - Aedeagus ventrolateral process shorter than aedeagal shaft..................................................... 8 7. Aedeagus with pair of slender apical processes.......................................... R. chiabaotawow (Huang) - Aedeagus without pair of slender apical processes............................................. R. sinensis (Jacobi) 8. Aedeagus with pair of slender apical processes, anal tube without ventral process................................... 9 - Aedeagus without apical processes ( Fig. 15 ), anal tube with barblike ventral process ( Fig. 14 )............................................................................................................... R. hamatus sp. nov. 9. Aedeagus ventrolateral process stout, and well separated from aedeagal shaft in caudo-ventral view; shaft apex inflated in caudo-ventral view ( Fig. 33 )............................................................ R. tenuispinus sp. nov. - Aedeagus ventrolateral process slender, and close to aedeagal shaft in caudo-ventral view; shaft with parallel sided in caudoventral view.............................................................. R. compressus Zhang, Zhang & Wei