Erythrogonia calva (Taschenberg, 1884)

Carvalho, Rachel A. & Mejdalani, Gabriel, 2014, Remarkable morphological features of taxonomic interest in the female genitalia of five Erythrogonia species (Hemiptera: Cicadomorpha: Cicadellidae), Zootaxa 3872 (3), pp. 275-290 : 279-281

Erythrogonia calva (Taschenberg, 1884)

( Figs 17–32 )

Length: female 7.8–8.2 mm (n = 2), male 8.0– 8.2 mm (n = 2).

Diagnosis. Anterior dorsum ( Fig. 17 ) brown to dark brown with yellow or yellowish-red triangular macula on crown contiguous to oval median macula on pronotum. Forewings ( Fig. 17 ) red with costal margin brown to dark brown, without maculae; membrane dark brown. Male pygofer with pair of small spiniform processes dorsoapically; subgenital plates with distal half strongly narrowed; aedeagal shaft slightly curved dorsally and then ventrally on apical portion, apex with pair of spiniform processes directed anterodorsally; paraphyses with rami long, sinuous, slightly exceeding pygofer apex. Female sternite VII ( Fig. 19 ) with posterior margin broadly emarginate and with slight median lobe, posterolateral portions forming triangular projections, basal portion with large inner lobe; sternite VIII ( Figs 18 and 19 ) formed by pair of lateral sclerites; first valvifers ( Figs 20–22 ) large, with hooklike process, connected to each other by broad triangular sclerite ( Fig. 21 ; a dashed line depicts the ventral margin of the sclerite); first valvulae ( Figs 22 and 24 ) with basiventral margin bearing small triangular projection; bases of second valvulae ( Fig. 23 ) with distinct, medially concave sclerite between rami.

Female genitalia. Sternite VII ( Fig. 19 ) with posterior margin broadly emarginate and with slight median lobe, posterolateral portions forming triangular projections; lateral margins expanded on apical half; lateral portions of posterior margin and almost all lateral margin serrated; ventral surface with median longitudinal carina, weakly striate, without setae; basal portion forming large inner lobe. Sternite VIII ( Figs 18 and 19 ), in dorsal view, with pair of sclerites positioned laterally and externally above first valvifers. Pygofer well produced posteriorly; posterior margin narrowly rounded; macrosetae on posterior portion and extending anteriorly along ventral margin. First valvifers ( Figs 20–22 ), in lateral view, large and quadrangular, anterior margin with hooklike process directed ventrally ( Fig. 21 , HPR); posteroventral corner with blunt projection; valvifers connected internally to each other by broad triangular sclerite on dorsal portion ( Figs 20 and 21 , TRS; a dashed line depicts the ventral margin of the sclerite in Fig. 21 ). Basal portion of first pair of valvulae ( Fig. 21 ), in ventral view, broadened, with distinct outer projection; basiventral margin bearing small triangular projection; sculptured areas ( Figs 25–27 ) mostly scalelike and distributed along almost all dorsal margin and on apical portion of ventral margin (with more linear tegumentary processes on basal portion of dorsal sculptured area and with more separated scales on ventral sculptured area); ventral margin convex except for small preapical concavity; apex acute; ventral interlocking device ( Fig. 22 ) located on basal half of blade, extending along ventral margin for most of its length, distal portion directed dorsally. Second pair of valvulae ( Fig. 28 ) broadened beyond basal curvature, narrowing slightly towards narrowly rounded apex; ventral margin approximately rectilinear; preapical prominence ( Fig. 32 ) inconspicuous; with approximately 27 mostly triangular continuous teeth (basal teeth more rounded; Fig. 29 ), extending from expanded basal portion to apical portion of blade; most teeth ( Fig. 27 ) with steep, smaller ascending portion and gradually declivous, larger descending portion; denticles ( Figs 30–32 ) distributed on teeth and on apical portion (except on apex) of blade (dorsal and ventral dentate apical portions with about same size); blade with ducts attaining teeth or terminating below them and extending to apex ( Figs 30–32 ); with distinct, medially concave sclerite between bases of rami ( Fig. 23 , SCL). Gonoplacs with basal half distinctly narrow in comparison with apical half, abruptly expanded on median portion; apical half with few setae; apex rounded.

Distribution. Venezuela, Brazil (states of Paraná and Santa Catarina), Argentina.

Material examined. Brazil: state of Paraná: one male and three females ( DZUP); state of Santa Catarina: one male ( MNRJ). One male and one female without locality label ( MNRJ).

Figures

FIGURES 17 – 23. Erythrogonia calva (Signoret). Female body (17) and genitalia (18 – 24): apex of abdomen in (18) dorsal and (19) ventral views; base of first valvifers and valvulae in (20) dorsal and (21) anterior views (a dashed line depicts the ventral margin of the triangular sclerite); (22) first valvifer and valvula, lateral view; (23) base of second valvulae, anterodorsal view. HPR = hooklike process; RAM = ramus; SCL = sclerite; TRS = triangular sclerite; VFI = first valvifer; VLI = first valvula. Only clearly visible portions of structures were colored in figures 18 and 19.

FIGURES 24 – 32. Erythrogonia calva (Signoret). Ovipositor first (24 – 27) and second (28 – 32) valvulae: (24) valvula, lateral view; (25) basidorsal, (26) apicodorsal, and (27) ventral sculptured areas in detail; (28) valvula, lateral view; teeth of (29) basal, (30) median, and (31) apical portions in detail; (32) denticles of ventroapical margin. DEN = denticle; DSA = dorsal sculptured area; DUC = duct; PPR = preapical prominence; VSA = ventral sculptured area; TOO = tooth.