Gergithomorphus Haglund, 1899

Gnezdilov, Vladimir M., 2025, Once per 125 years-a new species of the genus Gergithomorphus Haglund, 1899 (Hemiptera: Fulgoroidea, Tropiduchidae) from Gabon, Zootaxa 5632 (1), pp. 138-144 : 139

Genus Gergithomorphus Haglund, 1899

Gergithomorphus Haglund, 1899: 66 . Type species: Gergithomorphus fasciatifrons Haglund, 1899 .

Diagnosis. Coryphe very transverse, strongly concave. Eyes small, diameter of each eye is 1/4 of coryphe width. Metope wide, glossy, without carinae. Fore wings hemispherical, glossy, with main longitudinal veins smooth; R multifurcate; M 2, furcating after wing middle; CuA 2, furcating at claval middle; few transverse veins; clavus small. Hind wings tri-lobed, almost as long as fore wings, with well-developed remigium and small vannus. Legs neither flattened nor foliated. Hind tibia with two lateral spines subapically. First metatarsomere twice as long as second, with two latero-apical and five intermediate spines in straight row. Second metatarsomere with two latero-apical spines. Style elongate, enlarged apically (in lateral view), with large rounded process on inner surface near midpoint. Anal tube and penis basally connected by well sclerotized suspensorium. Penis (aedeagus + phallobase) elongate, weakly curved. Phallobase narrowing apically, with two ridges along its whole length and two rows of large teeth subapically.

Composition and distribution. Two species in Equatorial western and central Africa— Gabon and the Democratic Republic of the Congo.

Key to species of Gergithomorphus

1. Postclypeus with distinct median carina ( Fig. 2 ). Mesonotum and fore wings smoky brown ( Fig. 1 )................................................................................................ G. fasciatifrons Haglund, 1899

- Postclypeus smooth, without median carina ( Fig. 5 ). Mesonotum and fore wings light brownish green ( Figs 3, 4 )................................................................................................. G. levis sp. nov.

Figures

FIGURES 1–2. Gergithomorphus fasciatifrons Haglund, 1899, holotype, female. 1—dorsal view, 2—ventral view. Not to scale.

FIGURES 3–5. Gergithomorphus levis sp. nov., holotype, male. 3—dorsal view, 4—lateral view, 5—frontal view. Scale bar—1 mm.