Ommatissus fuscus, Chang, Zhi-Min & Chen, Xiang-Sheng, 2014

Chang, Zhi-Min & Chen, Xiang-Sheng, 2014, Review of the planthopper genus Ommatissus Fieber (Hemiptera: Fulgoromorpha: Tropiduchidae) with descriptions of three new species from China, Zootaxa 3856 (2), pp. 241-252 : 244-246

Ommatissus fuscus sp. nov.

( Figs 1–3 , 13–23 )

Description. Body length (from apex of vertex to tip of forewings): male 4.4–4.5 mm (N=6), female 4.6–4.9 mm (N=6).

General colour brown to pitchy, abdomen dark brown. Vertex and pronotum ( Figs 1–2 ) pale yellow, base of pronotum brown, anterior margin of pronotum with black fasciae; disc of mesonotum yellowish brown, with brown longitudinal stripe on each side of median carina, base of mesoscutellum black brown. Frons ( Fig. 3 ) with reverse pyriform dark patch in upper part, postclypeus dark brown, anteclypeus stramineous with pale yellow median callus, genae pale yellow, lorae diffusely dark brownish. Forewings ( Fig. 1 ) with brown to black except edges. Tips of spines on hind tibiae and tarsi black.

Vertex ( Fig. 13 ) shorter in middle than widest breadth (1.0:1.8). Frons ( Fig. 14 ) longer in middle than widest breadth (1.5:1.0). Pronotum ( Fig. 5 ) broader than long (3.7:1.0). Forewings ( Fig. 16 ) with about seven apical cells. Hind tibia each with 2 distinct lateral spines, spinal formula of hind leg 7–7–2.

Male genitalia. Pygofer ( Fig. 18 ) symmetrical, anterior margin straight and posterior margin arched. Anal tube ( Figs 21–22 ) short, anal style slightly surpassing anal tube. Gonostyli ( Figs 18–20 ) bilaterally symmetrical, in lateral view about 1.4 times as long as broad, with a strong hook-like process arising from laterodoral margin, acute tip bent lateroventrad, with triangular process arising from base of dorsal margin, subapical knife-like process pointed to inner side. Aedeagus ( Figs 18, 21–23 ) elongate and tubular, shaft slender in lateral view; base broad, then becoming narrow, tip nozzle-shaped, with phallotrema apically exposed. Periandrium ( Figs 21–23 ) surrounding penis at base, dorsally connected with ventrobasal margin of anal tube, ventral projection well developed, in dorsal view bridge-like, with asymmetrical lobate processes, subapically with two hooked process pointed to outer side, ventrally with 2 small teeth.

Type Material. Holotype ♂, Langshan (26°22′N, 110°49′E), Xinning, Hunan, China, 5 Oct. 2010, X.-S. Chen. Paratypes: 3♂♂, 2♀♀, same data as holotype; 2♂♂, 2♀♀, Fenshuiling National Nature Reserve (22°47′N, 103°12′E), Jinping County, Yunnan, China, 7 Aug. 2012, J.-K. Long, W.-B. Zheng; 2♀♀, Xianheping Nature Reserve (25°06′N, 105°27′E), Anlong County, Guizhou, 26 Aug. 2012, J.-K. Long; 1♂, Wangmo County (25°10′N, 106°06′E), Guizhou, 21 Aug. 2012, W.-B. Zheng.

Host plant. Unknown.

Etymology. The specific name is derived from the Latin word “ fuscus ” (fuscous) referring its fuscous forewings except marginal area.

Distribution. China (Hunan, Guizhou, Yunnan).

Remarks. This new species is similar to O. lofouensis Muir , but can be distinguished from the latter by the forewings with brown to black except the edge; frons with reverse pyriform dark patch in the upper part; periandrium with bridge process; and aedeagus straight and tubular, with tip nozzle-shaped.

Figures

FIGURES 1 – 12. Dorsal and ventral habitus of Ommatissus species. 1 – 3. O. fuscus sp. nov.; 4 – 6. O. lateralis sp. nov.; 7 – 9. O. lofouensis Muir; 10 – 12. O. trimaculatus sp. nov.. Scale bars = 1 mm.

FIGURES 13 – 23. Ommatissus fuscus sp. nov. 13. Head and thorax, dorsal view; 14. Same, lateral view; 15. Head, ventral view; 16. Forewing; 17. Hindwing; 18. Male genitalia, lateral view; 19. Pygofer and gonostyli, ventral view; 20. Same, dorsal view; 21. Anal segment and aedeagus, dorsal view; 22. Same, right side view; 23. Aedeagus, dorsal view. Scale bars = 1.0 mm (Figs 13 – 17), 0.5 mm (Figs 18 – 23).