Goniagnathus

Fletcher, Murray J. & Zahniser, James N., 2008, The first record of Goniagnathini from Australia with description of four new species of Goniagnathus Fieber (Hemiptera: Cicadellidae: Deltocephalinae), Zootaxa 1692, pp. 43-54 : 45

Key to males of Australian species of Goniagnathus .

1. Aedeagal shaft bearing prominent lateral processes over most of apical half ( Figures 38–39 , 43–44 ).....2

– Aedeagal shaft lacking processes, except short denticulations subapically in some species......................3

2. Pygofer ( Figure 35 ) broadly rounded, lacking processes; aedeagus, in posterior view ( Figure 39 ), broadly lanceolate with strong lateral serrations; brachypterous in known specimens.............................................. ............................................................................................................... Goniagnathus crocodontis sp.nov.

– Pygofer ( Figure 40 ) apically obliquely truncate, with short triangular dorsal tooth and ventrally prominent posteriorly; aedeagus, in posterior view ( Figure 44 ), narrow with long lateral teeth; macropterous in known specimens ...................................................................................... Goniagnathus pectinatus sp.nov.

3. Aedeagal shaft ( Figures 16 , 22 ) long and fine elongate with preapical process or serrations on anterior margin; Pygofer ventrally produced ( Figure 13 ) or rounded ( Figure 19 ); macropterous in known specimens.............................................................................................................................................................4

– Aedeagal shaft ( Figure 32 ) short, thick, lacking processes preapically; pygofer ( Figure 29 ) shallowly emarginate ventrally to form two short ventral processes; brachypterous in known specimens................... ................................................................................................................. Goniagnathus venenensis sp.nov.

4. Pygofer with dorsal tooth, posteroventrally rounded, not prominent ( Figure 19 ); aedeagus with row of short anterior serrations preapically on each side ( Figures 22–24 ) .......... Goniagnathus centralis (Evans)

– Pygofer apically rounded without dorsal tooth, prominently produced posteroventrally ( Figure 13 ); aedeagus apically sagittate with anterior preapical tooth on each side ( Figure 16 ) ............................................... .................................................................................................................... Goniagnathus osmelaki sp.nov.

Figures

FIGURES 35 – 39. G. crocodontis male genitalia: 35. pygofer, lateral view, 36. subgenital plates, 37. right paramere, ventral view, 38. aedeagus, lateral view, 39. aedeagus, posterior view

FIGURES 40 – 44. G. pectinatus male genitalia: 40. pygofer, lateral view, 41. subgenital plates, 42. right paramere, ventral view, 43. aedeagus, lateral view, 44. aedeagus, posterior view.

FIGURES 13 – 18. G. o sm e la k i male genitalia: 13. pygofer, lateral view, 14. subgenital plates, 15, right paramere, ventral view, 16. aedeagus, lateral view, 17. apex of aedeagus, posterodorsal view, 18. female pregenital sternite.

FIGURES 19 – 28. G. centralis male genitalia: 19. pygofer, lateral view, 20. subgenital plates, 21. right paramere, ventral view, 22. aedeagus lateral view, 23. apex of aedeagus, lateral view, 24. apex of aedeagus, posterodorsal view, 25. female pregenital sternite, 26. WA specimen, subgenital plates, 27. WA specimen, apex of aedeagus, lateral view, 28. WA specimen, apex of aedeagus, posterodorsal view.

FIGURES 29 – 34. G. venenensis male genitalia: 29. pygofer, lateral view, 30. subgenital plates, 31. right paramere and base of aedeagus, ventral view, 32. aedeagus, lateral view, 33 aedeagus, posteroventral view, 34. female pregenital sternite.