Key to subgenera and species of Chinese Goniagnathus Fieber (males) 1. Pygofer side without appendage. Fused subgenital plates and valve elongate. ..................... G. (Epitephra) rugulosus - Pygofer side with or without appendage. Fused subgenital plates and valve short...................................................... 2 2. Pygofer side without appendage. Style apophysis with apex strongly oblique, subapical lobe well-developed. .......... ................................................................................................................................................ G. (Goniagnathus) brevis - Pygofer side with dorsocaudal appendage present. Style apophysis with apex not strongly oblique, subapical lobe moderate to weakly developed. G. (Tropicognathus).................................................................................................... 3 3. Style apophysis expanded apically (Fig. 1 C)................................................................................................................ 4 - Style apophysis similar in width throughout length. .................................................................................................... 5 4. Pygofer side constricted at mid-length and broadened caudally. Aedeagal shaft strongly curved caudodorsad and in apical 0.25 strongly curved anteriorly, not bifid apically. ............................................................................ G. nervosus - Pygofer side with caudal lobe rounded (Fig. 1 A). Aedeagal shaft arcuate, bifid apically (Figs 1 D, 1E). ..................... ..................................................................................................................................................... G. viraktamathi sp. n. 5. Pygofer side appendage elongate. Aedeagal shaft in lateral view with pair of apical linear processes. ...................... 6 - Pygofer side appendage robust. Aedeagal shaft in lateral view with pair of apical triangular processes. ... G. cornutus 6. Lower aedeagal processes situated at midlength of shaft. ........................................................................... G. punctifer - Lower aedeagal processes situated slightly basad of midlength of shaft. ................................................... G. taiwanus

Published as part of Duan, Yani & Zhang, Yalin, 2012, A new species of Goniagnathus Fieber (Hemiptera: Cicadellidae: Deltocephalinae: Goniagnathini) from China, pp. 39-42 in Zootaxa 3385 on page 39, DOI: 10.5281/zenodo.210084