Spinagonalia, Cavichioli, Rodney Ramiro, 2008

Cavichioli, Rodney Ramiro, 2008, A new Neotropical sharpshooter genus Spinagonalia (Insecta, Hemiptera, Cicadellidae, Cicadellinae) with description of a new species from Citrus orchards and grapevines, Zootaxa 1746, pp. 61-64 : 61-63

Spinagonalia gen. nov.

( Figs 1 –13 )

Type-species. Spinagonalia rubrovittata Cavichioli , sp. nov.

Description. Length. Ψ 6.87 – 7.43; ɗ 6,87 – 7,31

Head ( Fig. 1 ). Crown moderately produced, length slightly more than half interocular width and slightly more than 3/10 transocular width; anterior margin rounded in dorsal view; without carina at transition from crown to face; with shallow median fovea; without sculpturing or setae. Epicranial suture distinct, extending to mid-length of crown. Frontogenal sutures extending onto crown and attaining ocelli. Ocelli on imaginary line between anterior eye angles; each equidistant from adjacent eye angle and median line of crown. Antennal ledges not protuberant in dorsal view; in lateral view slightly oblique and moderately carinate. Antennae almost as long as combined length of crown and pronotum. Frons convex; muscle impressions distinct. Epistomal suture incomplete for short distance medially. Clypeus in lateral view continuing profile of frons; slightly angled at mid-length; apex rounded.

Thorax ( Fig. 1 ). Pronotum as wide as transocular width; lateral margins slightly convergent anteriorly; median length slightly more than half transhumeral width; dorsopleural carinae complete; posterior margin with slight median emargination; disc without sculpturing or pubescence. Mesoscutellum not striate. Forewing with distal membrane; veins distinct, slightly elevated; with four apical cells of which base of third is more distal than base of fourth; without anteapical plexus of veins; outer and inner anteapical cells closed, median one open; texture slightly coriaceous and without sculpturing; in females in rest position exceeding apex of ovipositor. Hindwing vein R2+3 incomplete. Hind leg with femoral setal formula 2-1-1; apical 2/3 of anterodorsal row of macrosetae with 3-5 short intercalary setae between each pair of macrosetae; first hind tarsomere slightly longer than combined length of two more distal tarsomeres; with two parallel rows of short setae on plantar surface.

Male genitalia. Pygofer moderately produced; without process; posterior margin broadly rounded; macrosetae numerous and distributed posteriorly from basal third to apex ( Fig. 2 ). Valve transversely narrow and slender, W-shaped; anterior margin with median shallow emargination and posterior margin with median region projected posteriorly; articulating with pygofer and subgenital plates ( Fig. 3 ). Subgenital plates extending posteriorly almost to pygofer apex; subtriangular, narrowed on apical two-thirds; with few uniseriate macrosetae on lateral margins, not fused basally ( Fig. 3 ). Style narrowed, short, with slight preapical lobe and truncate apex ( Fig. 4 ). Connective short and robust; with median dorsal keel ( Fig. 4 ). Paraphysis very short, cordiform and fused with connective apex ( Fig. 4 ). Aedeagus with shaft slen- der, curved gradually dorsally ( Fig. 5 ); with pair of slender acute dorsoapical processes ( Fig. 6 ). Anal tube segment X with pair of basal ventrolateral processes, acute and curved posteriorly ( Fig. 5 ).

Female genitalia. Pygofer moderately produced; posterior margin narrowly rounded; macrosetae distributed on apical third and along ventral margin ( Fig. 7 ). Sternite VII moderately produced; posterior margin emarginated with two lobes laterally and posterolateral margins slightly angled ( Fig. 8 ). Internal sternite VIII slightly sclerotized and covering bases of first valvulae of ovipositor ( Fig. 9 ). First valvula with triangular bases and foot-shaped dorsal projection ( Fig. 10 ), apex acute ( Fig. 11 ). Second valvula broadened along apical two-thirds; dorsal margin of expanded area regularly convex, bearing approximately 22 continuous teeth, basal three teeth close-set and five next much larger than others; ventral prominence slightly distinct; apex acute to narrowly rounded ( Fig. 12 ).

Remarks. The new genus is apparently related to the Erythrogonia generic group sensu Young, 1977, sharing with some genera in this group the following characteristics: 1— presence of anal tube processes as found in Inuyana Young, 1977 , although apical in the latter and basal in Spinagonalia ; 2—connective similar to that of Inuyana ; both are narrow and with a keel projected anteriorly; 3—aedeagus slender with elongate apical processes similar to those of Aguatala Young, 1977 ; 4 —paraphysis short, similar to that of Pegogonia Young, 1977 .

Figures

FIGURES 1 – 12. Spinagonalia rubrovittata gen. nov. and sp. nov. (Paratypes). 1 – 6, male. 1 — Head, pronotum and scutellum, dorsal view; 2 — pygofer, lateral view; 3 — valve and subgenital plate, ventral view; 4 — style, connective and paraphysis, dorsal view; 5 — aedeagus and anal tube, lateral view; 6 — apex of aedeagus, posterior view; 7 – 12, female. 12 — pygofer and sternite VII, lateral view; 8 — sternite VII, ventral view; 9 — sternite VIII, dorsal view; 10 — base of the first valvula, lateral view; 11 — first valvula apex, lateral view; 12 — second valvula, lateral view.

FIGURE 13 — Spinagonalia rubrovittata gen. nov. and sp. nov. Paratype, lateral view.