Acrogonia tenuis, Silva, Roberta Dos Santos Da, Cavichioli, Rodney R., Takiya, Daniela M. & Mejdalani, Gabriel, 2017

Silva, Roberta Dos Santos Da, Cavichioli, Rodney R., Takiya, Daniela M. & Mejdalani, Gabriel, 2017, Descriptions of eight new Acrogonia species from the Amazon region, including peculiar features of the female genitalia (Hemiptera: Cicadellidae: Cicadellinae: Proconiini), Zootaxa 4244 (4), pp. 515-534 : 525-526

Acrogonia tenuis sp. nov.

( Figs. 53–74 )

Total length. Male holotype 8.5 mm; female paratype 11.0 mm.

Holotype description. Head and thorax. Structural features of head and thorax ( Figs. 53–54 ) much as described above for A. amazonensis sp. nov.

Color. Crown, anterior margin of pronotum and mesonotum ( Fig. 53 ) yellow with irregular reddish-brown or brown marks; disc of pronotum reddish-brown with yellow margins; mesonotum with apex pale yellow. Forewings ( Figs. 53–54 ) reddish-brown, except for membranous portions. Face, lateral and ventral portions of thorax, and legs ( Fig. 54 ) mostly yellow; superior portion of frons and of lateral lobe of pronotum brown.

Male genitalia. Pygofer ( Fig. 55 ), in lateral view, strongly produced posteriorly; with distinct lobe on basiventral portion; disc with dispersed setae. Subgenital plates ( Figs. 56–57 ), in ventral view, subtriangular; basal third slightly expanded laterally and then tapering toward apex; distal portion appearing articulated with remainder of plate ( Figs. 56–57 ); in lateral view, plates short, not extending posteriorly beyond basal half of pygofer; plate surface with scattered setae. Connective ( Fig. 58 ), in dorsal view, T-shaped; stalk with median keel, apex distinctly expanded. Style ( Fig. 58 ), in dorsal view, extending posteriorly much farther than apex of connective; preapical lobe distinct, bearing few setae; apical portion directed outward; apex acute. Aedeagus ( Figs. 59–60 ) symmetrical; shaft ( Fig. 59 ), in lateral view, elongate, sinuate, distal half slender and slightly curved dorsally, median third with small dentiform process; in ventral view, apex ( Fig. 60 ) with pair of tiny processes directed laterally; aedeagal base with pair of conspicuous basal processes with their apices curved anterodorsally. Anal tube ( Fig. 61 ) without processes.

Female. Genitalia. Sternite VII ( Fig. 62 ), in ventral view, with basal, median bifurcated structure (BBS) and pair of lateral, narrow elongate projections (LPR). Pygofer ( Fig. 63 ), in lateral view, strongly produced posteriorly; apex obtuse; disc with dispersed setae. First valvifers ( Fig. 64 ), in lateral view, elongate, subrectangular. First valvulae ( Fig. 64 ), in lateral view, with conspicuous basiventral lobe (BLB; Fig. 65 ); with projection on median portion of ventral margin (VPR); apex acute, dentiform ( Figs. 64, 69 ); setae distributed on ventral margin of basal third and basiventral lobe; ventral interlocking device located on basal half of blade; dorsal sculptured area ( Figs. 66–67, 69 ) extending from basal portion of blade to apex, formed mostly by scale-like process arranged in oblique lines; ventral sculptured area ( Fig. 68 ) restricted to apical portion of blade, formed mostly by scale-like processes. Second valvulae ( Fig. 70 ), in lateral view, with dorsal margin slightly convex; ventral margin almost straight; preapical prominence strong ( Fig. 74 ); apex obtuse; about 27 teeth ( Figs. 70–74 ) distributed on dorsal expanded portion of blade; most teeth ( Fig. 72 ) triangular, armed with denticles, with ascending portion (= anterior edge) short, descending portion (= posterior edge) elongate; blade with ducts ( Figs. 72–73 ) extending to apical portion and to teeth or terminating below latter; few basal teeth ( Fig. 71 ) without ducts. Gonoplacs, in lateral view, with basal half narrow and apical half distinctly expanded; apex obtuse.

Etymology. The name of the new species, tenuis , refers to the slender apical half of the aedeagus ( Figs. 59– 60 ).

Type material. Holotype: male, “Sinop—MT [state of Mato Grosso]\ X.1976 \ M. [ Moacir ] Alvarenga col.” ( DZUP) . Paratype: one female, same data as holotype ( DZUP) .

Figures

FIGURES 53 – 61. Acrogonia tenuis sp. nov. 53, body, male holotype (DZUP), dorsal view (total length 8.5 mm); 54, body, male holotype, lateral view; 55 – 61, male genitalia: 55, pygofer, lateral view; 56, subgenital plates, ventral view; 57, subgenital plate and part of style, lateral view; 58, styles and connective, dorsal view; 59, aedeagus and its basal processes, lateral view; 60, aedeagus and its basal processes, ventral view; 61, anal tube, lateral view. Scale bars: 55 = 1 mm; 56 – 61 = 0.5 mm.

FIGURES 62 – 74. Acrogonia tenuis sp. nov., female. 62, sternite VII, ventral view; 63, pygofer, lateral view; 64, first valvifer and first valvula, lateral view; 65, basal lobe of first valvula; 66, dorsal sculptured area at basal portion of blade; 67, dorsal sculptured area at median portion of blade; 68, ventral sculptured area; 69, apical portion of blade; 70, second valvula, lateral view; 71, teeth at basal portion of blade; 72, teeth at median portion of blade; 73, teeth at apical portion of blade; 74, apical third of blade. Scale bars: 62 – 64, 70 = 1 mm. BBS: basimedian bifurcated structure, BLB: basal lobe, LPR: lateral projection, VPR: ventral projection.