Goniagnathus

Viraktamath, C. A. & Gnaneswaran, R., 2009, Three new species of Goniagnathus (Hemiptera: Cicadellidae) from the Indian subcontinent with description of a new subgenus, Zootaxa 2224 (1), pp. 51-59 : 52

Key to subgenera of the genus Goniagnathus

(modified from Emeljanov (1999))

1. Male pygophore with dorsal or caudal appendage well developed ....... Goniagnathus (Tropicognathus) subgen. nov.

- Male pygophore without a dorsal or caudal appendage ............................................................................................... 2

2. Fused subgenital plate rounded; apex of style short, strongly dilated, hatchet-shaped; preapical lobe well developed ...................................................................................................................................................................................... 3

- Fused subgenital plate rectangular; apex of style large, longer than wide, apically truncate; preapical lobe indistinct ...................................................................................................................................................................................... 4

3. Fused subgenital plate short, upper margin of style strongly oblique; preapical prominence rounded; aedeagal shaft nearly straight, rather S-shaped; base small, without processes, dorsal part not projecting .......................................... ............................................................................................................................ Goniagnathus (Goniagnathus) Fieber

- Fused subgenital plate elongate; upper margin of style oblique, nearly transverse; preapical prominence strong, laterally projecting nearly to style apex; aedeagal shaft arcuate, with basal forked process ............................................. ...................................................................................................................... Goniagnathus (Goniozygotes) Emeljanov

4. Fused subgenital plate longer than broad; aedeagus without ventral processes ........................................................... 5

- Fused subgenital plate broader than long; Aedeagus with ventral pair of long processes ............................................ .......................................................................................................................... Goniagnathus (Epistagma) Emeljanov

5. Dorsal part of aedeagal base not projecting (indistinct); apex of aedeagal base compressed, rounded in sagital plane .......................................................................................................................... Goniagnathus (Epitephra) Emeljanov

- Dorsal part of aedeagal base lobe-like, projecting; apex of aedeagal base pointed ....................................................... ............................................................................................................................. Goniagnathus (Episarca) Emeljanov