Tetricodissus, Wang, Menglin, Bourgoin, Thierry & Zhang, Yalin, 2015

Wang, Menglin, Bourgoin, Thierry & Zhang, Yalin, 2015, A new genus of the tribe Parahiraciini (Hemiptera: Fulgoroidea: Issidae) from Southern China, Zootaxa 3957 (1), pp. 77-84 : 79

Genus Tetricodissus gen. nov.

Type species: Tetricodissus pandlineus sp. nov.

Description. Head including eyes approximately as broad as pronotum. Coryphe subrectangular, slightly wider than long, without carina, anterior margin slightly angulately produced, posterior margin anguately concave at the middle ( Figs 1, 2 ). Metope wide, apical margin distinctly concave medially, lateral margins slightly enlarged below eyes, with median carina elevated from apical margin extending near to base, but not reaching postclypeus at disc, sublateral carinae absent ( Figs 5, 6 ). Postclypeus flat, without carina ( Figs 5, 6 ). Rostrum surpassing intermediate coxae in ventral view. Pronotum with some verrucae on disc, median carina absent. Mesonotum without carina. Fore wings elongate, without hypocostal plate, costal margin and claval margin almost paralleled, outer margin obliquely rounded, ScP+R vein forked at basal 1/5, first fork of vein MP near to middle, vein MP3+4 separated before MP1+2, vein CuA simple, claval suture distinct, veins Pcu and A1 fused at basal 2/3 of clavus ( Fig. 7 ), whole fore wing diffused with numerous transverse veins ( Figs 1, 2 ). Hind wings well developed, 3-lobed, with veins reticular, anal lobe extremely narrow ( Fig. 8 ). Hind tibiae with 2 lateral teeth in apical half.

Male genitalia. Anal tube long, slightly surpassing posterior margin of the capitulum of gonostylus ( Fig. 9 ). Gonostylus triangular in profile, caudo-ventral angle actute, capitulum well developed with apical and lateral teeth ( Figs 9, 12 ). Pygofer rectangular in lateral view; posterior margin not strongly caudally produced ( Fig. 9 ). Periandrium symmetrical, basally tubular, with a pair of ventral processes pointing anteriorly ( Fig. 13 ); apical part divide into dorsal lobe, paired lateral lobes and ventral lobe.

Female genitalia. Anal tube elongate, surpassing level of posterior margin of gonoplac. Gonocoxa VIII in dorsal view rectangular, forming a right angle with gonapophysis VIII ( Fig. 18 ). Gonoplacs nearly rounded in lateral view ( Fig. 22 ), in dorsal view fused near base, with basal latero-margin developed in a single lobe ( Fig. 21 ). Hind margin of sternite VII concave medially ( Fig. 17 ).

Etymology. The name is an arbitrary combination between two generic names of issids: Tetricodes and Issus ; the gender is masculine.

Distribution. China (Yunnan).

Remarks. Tetricodissus is similar to genus Neotetricodes Zhang & Chen, 2012, but differs by 1) the apical margin of metope obviously concave at middle (apical margin straight in Neotetricodes), 2) the periandrium with a pair of long ventral processes, without lateral laminae (periandrium with lateral laminae, but without ventral processes in Neotetricodes) and 3) veins Pcu and A1 of fore wing fused at basal 2/3 of clavus (veins of clavus fused at middle in Neotetricodes). This new genus also differs from Tetricodes Fennah, 1956 by the absence of the black hemispherical protuberance on metope, the elevated median frontal carina extending near base and the periandrium without lateral laminae.

Figures

FIGURES 1 – 6. Tetricodissus pandlineus sp. nov., adult. 1. male, dorsal view; 2. female, dorsal view; 3. male, lateral view; 4. female, lateral view; 5. male, frontal view; 6. female, frontal view. Scale bars = 1 mm. Abbreviations: V: V-shaped marking on fore wing; a and b: two apical patches on fore wing.

FIGURES 7 – 15. Tetricodissus pandlineus sp. nov., male. 7. fore wing; 8. hind wing; 9. genitalia, lateral view; 10. anal tube, dorsal view; 11. phallic complex, postero-ventral view; 12. gonostylus, lateral view; 13. phallic complex, lateral view; 14. apex of phallic complex, postero-dorsal view; 15. capitulum of gonostylus, caudal view. Scale bars 7 – 8 = 1 mm, 9 – 15 = 0.2 mm. Abbreviations: dl: dorsal periandrium lobe, ll: lateral periandrium lobe, vl: ventral periandrium lobe; ae: aedeagus.

FIGURES 16 – 22. Tetricodissus pandlineus sp. nov., female. 16. anal tube, dorsal view; 17. sternite VII; 18. gonocoxa VIII and gonapophysis VIII, lateral view; 19. gonapophysis IX and gonospiculum bridge, lateral view; 20. gonapophysis IX and gonospiculum bridge, ventral view; 21. gonoplac, dorsal view; 22. gonoplac, lateral view. Scale bars = 0.2 mm.