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 Riseveinus tenuispinus sp. nov. ( Figs 27–35 ) Description. Body length (incl. forewing): ♂ , 7.9 mm ; Head width (incl. eyes): ♂ , 1.5 mm ; head length: ♂ , 1.6 mm . Crown ( Fig. 29 ) slightly shorter than length of pronotum and scutellum together. FIGURES 1–10. Riseveinus cervcornutus sp. nov. : 1. male habitus, dorsal view; 2. male habitus, lateral view; 3. male head and thorax, dorsal view; 4. male face; 5. male pygofer, lateral view; 6. male pygofer side, lateral view; 7. connective and style, ventral view; 8. aedeagal, ventral view; 9. aedeagal, lateral view; 10. subgenital plate, ventral view. FIGURES 11–17. Riseveinus hamatus sp. nov. : 11. male habitus, dorsal view; 12. male habitus, lateral view; 13. male face; 14. male pygofer side, lateral view; 15. aedeagal, connective and style, ventral view; 16. aedeagal, lateral view; 17. subgenital plate, ventral view. FIGURES 18–26. Riseveinus Spinatus sp. nov. : 18. male habitus, dorsal view; 19. male habitus, lateral view; 20. male face; 21. female habitus, dorsal view; 22. female habitus, lateral view; 23. male pygofer, lateral view; 24. aedeagal, connective and style, ventral view; 25. aedeagal, lateral view; 26. subgenital plate, ventral view. FIGURES 27–35. Riseveinus Tenuispinus sp. nov. : 27. male habitus, dorsal view; 28. male habitus, lateral view; 29. male head and thorax, dorsal view; 30. male face; 31. male pygofer side, lateral view; 32. aedeagal, connective and style, ventral view; 33. aedeagal, ventral view; 34. aedeagal, lateral view; 35. subgenital plate, ventral view. Aedeagal shaft short, swollen at base then gradually narrowing towards apex in lateral view ( Fig. 34 ), with pair of apical processes ( Fig. 33 ); apodeme bilobed with moderately long dorsolateral extensions ( Figs 33, 34 ); paired ventrolateral processes slightly shorter than aedeagal shaft, slender, and recurved dorsally and closely paralleling ventral margin of aedeagal shaft in lateral view ( Fig. 34 ). Type material. Holotype ♂ ( NMNS ), TAIWAN : Kaohsiung , Shanping Forest Res., Aiyong Rd. ca. km 8, 1200m , 22°57'32"N 120°41'43"E , 24.vi.2004 , C.H. Dietrich , 26-1, sweeping. Etymology. The specific epithet, a combination of “tenuis” meaning slender, and “ spina ” meaning spinelike, refers to the slender, spiniform aedeagal ventrolateral processes. Remarks. This species is similar to R. compressus Zhang, Zhang & Wei externally, but differs in having: 1) the aedeagus ventrolateral process slender and gracile ( Fig. 33 ; stout in R. compressus ); 2) aedeagus ventrolateral process recurved dorsally and paralleling ventral margin of aedeagal shaft in lateral view ( Fig. 34 ; recurved but well separated from shaft in R. compressus ); 3) distal part of aedeagal shaft inflated in caudal view ( Fig. 33 ; parallel-sided from base to apex in R. compressus ); 4) aedeagus ventrolateral process close to aedeagal shaft in caudoventral view ( Fig. 33 ; well separated from shaft in R. compressus ).