Acrogonia filiformis, 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 : 526-530

Acrogonia filiformis sp. nov.

( Figs. 75–92 )

Total length. Male holotype 10.5 mm; male paratype 10.0 mm; female paratype 11.4 mm.

Holotype description. Head and thorax. Structural features of head and thorax ( Figs. 75–76 ) much as described above for A. amazonensis sp. nov., except for median length of crown approximately equal to interocular width and 7/10 transocular width; forewings ( Figs. 75–76 ) mostly translucent.

Color. Crown ( Fig. 75 ) brown with yellow dots and marks bordering anterior margin from apical portion to anterior eye angles; other small yellow markings also present; frontogenal, temporal and coronal sutures dark brown to black. Posterior 2/3 of pronotum and mesonotum ( Fig. 75 ) dark brown; anterior 1/3 of pronotum brown with irregular yellow marks; lateral portions of pronotum yellowish; mesonotum with pair of lateral brownishyellow marks, apex pale yellow. Forewings ( Figs. 75–76 ) mostly translucent with brown areas and dots on clavus and apical third of corium. Face ( Fig. 76 ) dark brown; frons superiorly brown with yellow marks, yellow inferiorly. Lateral and ventral portions of thorax ( Fig. 76 ) mostly dark brown. Legs ( Fig. 76 ) brownish-yellow to brown.

Male genitalia. Pygofer ( Fig. 77 ), in lateral view, well produced posteriorly; without basiventral projection; with sclerotized projection directed inward on distal third of ventral margin; disc with dispersed setae. Subgenital plates ( Fig. 78 ), in ventral view, subtriangular, basal portion slightly expanded laterally, then narrowing slightly toward distal fourth, latter more strongly narrowed; median portion of lateral margin slightly concave; in lateral view, plates elongate, extending almost as far posteriorly as pygofer apex; plate surface with scattered setae. Connective ( Fig. 79 ), in dorsal view, T-shaped; arms short; stalk narrow, very elongate, with median keel. Style ( Fig. 79 ), in dorsal view, extending much farther posteriorly than apex of connective; outer margin sinuous; without preapical lobe; apex acute. Aedeagus ( Fig. 80 ) symmetrical, filiform, elongate; shaft curved dorsally at base and curved ventrally at basal third; without processes. Anal tube ( Fig. 81 ) without processes.

Female. Genitalia. Sternite VII ( Fig. 82 ), in ventral view, bilobed; with deep V-shaped posterior emargination. Pygofer ( Fig. 83 ), in lateral view, well produced posteriorly; apex obtuse; setae distributed mostly on posterior portion and extending anteriorly along ventral margin. First valvifers ( Figs. 84–85 ), in lateral view, subrectangular. First valvulae ( Fig. 84 ), in ventral view, slightly expanded basally; in lateral view ( Fig. 85 ), with slight projection on basiventral half; apex acute, dentiform ( Figs. 85–87 —DNP); ventral interlocking device ( Fig. 84 —VID) located on basal half of blade, small, lobate; dorsal sculptured area extending from basal portion of blade to apex, formed mostly by scale-like processes arranged in oblique lines; ventral sculptured area ( Fig. 87 ) restricted to apical portion of blade, formed mostly by scale-like processes. Second valvulae ( Fig. 88 ), in lateral view, distinctly expanded beyond basal curvature; dorsal margin convex; ventral margin approximately straight; preapical prominence strong ( Figs. 88 —PPR, 92); apex obtuse ( Figs. 88, 92 ); about 16 teeth ( Figs. 88–91 ) distributed on dorsal expanded portion of blade; most teeth ( Figs. 90–91 ) triangular, armed with denticles, with ascending portion (= anterior edge) short, descending portion (= posterior edge) long; basalmost two or three teeth small and inconspicuous; blade with ducts ( Figs. 90–92 ) extending to apical portion and to teeth or terminating below latter; few basal teeth ( Fig. 89 ) without ducts. Gonoplacs, in lateral view, with basal half narrow and apical half distinctly expanded; apex obtuse.

Intraspecific variation. The color of the anterior pronotal margin varies from brown to brownish-yellow. The mesonotum may be entirely brown or brown with yellow dots. Some variation may be due to fading of coloration in preserved specimens.

Etymology. The name of the new species, filiformis , refers to the thread-like shape of the aedeagus ( Fig. 80 ).

Type material. Holotype: male, “Sinop-MT [state of Mato Grosso]\ BR X-1976 \ M. [Moacir] Alvarenga ” ( DZUP) . Paratypes: one male, “ Brasil Pará \ Serra Norte \ EST. NIANGANÊS\ Col. NOTURNA \ 26-X.1984 ” ( MPEG) ; one female, “ Sinop - MT\ X.1976 \ M. Alvarenga col” ( DZUP) .

Figures

FIGURES 75 – 81. Acrogonia filiformis sp. nov. 75, body, female paratype (DZUP), dorsal view (total length 11.4 mm); 76, body, female paratype, lateral view; 77 – 81, male genitalia: 77, pygofer, lateral view; 78, subgenital plates, ventral view; 79, styles and connective, dorsal view; 80, aedeagus, lateral view; 81, anal tube, lateral view. Scale bars: 77 – 80 = 1 mm; 81 = 0.5 mm.

FIGURES 82 – 92. Acrogonia filiformis sp. nov., female. 82, sternite VII, ventral view; 83, pygofer, lateral view; 84, first valvifers and first valvulae, ventral view; 85, first valvifer and first valvula, lateral view; 86, apical portion of blade; 87, ventral sculptured area; 88, second valvula, lateral view; 89, teeth at basal portion of blade; 90, teeth at basimedian portion of blade; 91, teeth at medioapical portion of blade; 92, apex of blade. Scale bars: 82, 83, 85 = 1 mm; 84, 88 = 0.5 mm. DNP: dentiform projection, PPR: preapical prominence, VID: ventral interlocking device.