Goniagnathus (Tropicognathus) cornutus Duan, 2009

Duan, Yani, Zhang, Yalin & Webb, M. D., 2009, Review of the leafhopper tribe Goniagnathini (Hemiptera: Cicadellidae: Deltocephalinae) from China, Zootaxa 2314 (1), pp. 50-62 : 54-56

Goniagnathus (Tropicognathus) cornutus Duan , sp. n.

( Figs 3A–E , 7B, 7H )

Length. Male: 5.3 mm.

Ochraceous, speckled with brown mottling. Anterior margin of vertex dark brown; face with interrupted black fascia. Forewing ochraceous.

Pronotum 2.3x as long as crown. Forewing macropterous, four apical cells, three anteapical cells with, inner anteapical cell closed basally by cross vein.

Male genitalia. Pygophore subtriangular, with a few macrosetae before caudal margin, dorsocaudal appendage reaching caudo-ventral angle. Fused subgenital plates and valve with slightly convex caudal margin. Apophysis of style bilobed. Aedeagal shaft with a pair of ventral apical blade-like processes caudally narrowed to a pointed apex and one pair of slightly asymmetrical median processes on basal 0.4; gonopore large, apical.

Etymology. The species name is based on the horn-like apical aedeagal processes.

Type. Holotype: ♂, China, Hainan Prov., Mt. Lianhua , 5. viii. 1929 ( ZSU).

Remarks. This new species is closely related to Goniagnathus punctifer but can be easily distinguished from the latter by: 1) pygophore with dorsal process more robust and reaching caudo-ventral angle; 2) aedeagal shaft with paired apical processes triangular in lateral view.

Figures

FIGURE 3. Goniagnathus(Tropicognathus) cornutus Duan, sp. n. A: Male pygophore, lateral view; B: Fused subgenital plates and valve, ventral view; C: Style, dorsal view; D: Aedeagus, dorsal view; E: Aedeagus, lateral view.

FIGURE 7. Goniagnathus and Tamaricades species. A–F, habitus. A: G. brevis; B: G. cornutus Duan, sp. n.; C: T. tamaricus; D: G. nervosus; E: G. punctifer; F: G. rugulosus. G–L, face. G: G. brevis; H: G. cornutus Duan, sp. n.; I: T. tamaricus; J: G. nervosus; K: G. punctifer; L: G. rugulosus.