Juliaca sertigerula ( Jacobi, 1905 )

Dos Santos, Alana C., Cavichioli, Rodney R., Takiya, Daniela M. & Mejdalani, Gabriel, 2018, Juliaca Melichar, 1926 (Hemiptera: Cicadellidae: Cicadellini): description of a new species from Southeastern Brazil and redescriptions of J. sertigerula (Jacobi, 1905) and J. xanthogramma (Signoret, 1854) comb. nov., Zootaxa 4472 (1), pp. 165-175 : 168-171

Juliaca sertigerula ( Jacobi, 1905)

( Figures 14–30 )

Tettigoniella sertigerula Jacobi, 1905 : p. 180 [original description]. Distribution: Peru and Bolivia.

Juliaca sertigerula ( Jacobi, 1905) : Young 1977: p. 448 [new combination], p. 469, fig. 384a, f, p [illustrations of the anterior dorsum and aedeagus]. Distribution: Ecuador, Peru, and Bolivia.

Length: male 4.8–5.1 mm (n = 3); female 5.1–5.2 mm (n = 2).

Head ( Figs. 14 , 20 ), in dorsal view, well produced anteriorly, triangular; median length of crown approximately 6/10 of interocular width and 4/10 of transocular width; anterior margin subacute, without carina at transition from crown to face. Ocelli located on imaginary line between anterior eye angles, each approximately equidistant between median line of crown and adjacent anterior eye angle. Crown without transverse concavity before ocelli; antennal ledge, in lateral view, with anterior margin vertical and straight. Face without distinct pubescence; frons slightly flattened medially, muscle impressions distinct; epistomal suture obsolete; clypeus, in lateral view, with profile continuing contour of frons.

Thorax ( Figs. 14 , 20 ) with pronotal width greater than transocular width of head; lateral margins of pronotum convergent anteriorly, posterior margin slightly concave; dorsolateral carina distinct, extending as far anteriorly as eye margin; disk without transverse rugae. Mesonotum with scutellum not striate. Forewing with membrane indistinct; bases of anteapical cells indistinct; four apical cells, base of fourth indistinct. Hind wing with vein R2+3 incomplete. Hind leg with length of first tarsomere greater than combined length of two more distal tarsomeres.

Male terminalia. Pygofer ( Fig. 15 ), in lateral view, slightly produced posteriorly; posterior margin convex; disk with macrosetae on apical half; without processes. Subgenital plate ( Fig. 16 ), in ventral view, with apical half strongly narrowed; in lateral view, extending posteriorly slightly beyond pygofer apex; with long uniseriate macrosetae, microsetae also present. Style ( Figs. 17–18 ), in dorsal view, without preapical lobe; slightly narrowed preapically; apex truncate. Connective ( Figs. 17–18 ), in dorsal view, Y-shaped, arms broad and strongly divergent; stalk short, not extending as far posteriorly as apex of style. Aedeagus ( Fig. 19 ) symmetrical, without processes; shaft, in lateral view, with dorsal margin convex and ventral margin concave; apex truncate. Paraphyses ( Fig. 18 ) symmetrical; in dorsal view, with stalk broad, articulated with apex of connective; rami very slender, shorter than stalk, with pair of basal projections directed basolaterally.

Female terminalia. Sternite VII ( Figs. 21–22 ), in ventral view, well produced posteriorly, gradually narrowed towards apex; distal margin with small, median dentiform projection. Pygofer ( Fig. 21 ), in lateral view, moderately produced posteriorly; posterior margin narrowly rounded; macrosetae distributed on posterior half and extending anteriorly along ventral margin. Second valvula ( Figs. 23–27 ), in lateral view, straight; dorsal margin bearing about 20 continuous teeth; most teeth ( Figs. 24–26 ) elongate, with basal portion projected dorsally and apical portion very low, flattened; apicalmost 3–4 teeth ( Fig. 27 ) triangular; denticles distributed on teeth and on apical portion of blade (ventral dentate apical portion distinctly longer than dorsal portion, Fig. 27 ); preapical prominence ( Fig. 27 ) distinct; apex acute. Gonoplac (partially visible in Fig. 21 ), in lateral view, with basal half narrow; apical half expanded, slightly narrowed towards apex; latter obtuse.

Color ( Figs. 14 , 20 , 28–30 ). Dorsum dark brown to black with transverse stripes that may be complete or interrupted. Crown with transverse yellow, greenish-yellow or green stripe extending laterally over antennal ledges, or with pair of lateral spots. Pronotum with posterior transverse yellow, greenish-yellow or green stripe (sometimes covering most of disk, sometimes reduced to a few spots) extending laterally over lateral pronotal lobes. Forewing with two transcommissural yellow, greenish-yellow or green stripes, basal one extending from basal half of clavus (including apex of scutellum) to costal margin, apical one extending from distal portion of clavus to costal margin; distal third with yellow, greenish-yellow, green or bluish-white curved stripe extending from outer margin of first apical cell to costal margin; vitreous area located at costal margin between apical transcommissural stripe and curved distal stripe. Face dark brown to black; antennal ledge, posterior margin of gena, maxillary plate, inferior portions of lorum and clypeus, labrum, and labium yellow to brownish-yellow (these yellow to brownish-yellow areas are sometimes more extensive). Lateral and ventral portions of thorax mostly dark brown to black. Legs yellow to brownish-yellow; posterior coxa dark brown to black. Abdomen, in ventral view, dark brown to black; posterior margin of sternites and lateral and posterior margins of laterotergites yellow; subgenital plate yellowish-brown.

Taxonomic notes. Young (1977) illustrated only the anterior dorsum and aedeagus of J. sertigerula . The external morphology and color features of our specimens agree with the original description of Jacobi (1905). This colorful and variable species, whose (sometimes interrupted) stripes or spots may be yellow, greenish-yellow, green or bluish-white, can be distinguished by the following features ( Figs. 14 , 20 , 28–30 ): (1) crown with transverse stripe extending laterally over antennal ledges, or with pair of lateral spots; (2) pronotum with posterior transverse stripe (sometimes covering most of disk, rarely reduced to a few spots) extending over lateral pronotal lobes; (3) forewing with two transcommissural stripes, a curved preapical stripe, and a vitreous area located at costal margin between distal transcommissural stripe and preapical curved stripe. In addition to the aforementioned color variation, the stripes (crown, pronotum, and forewing) also vary from narrow to broad ( Figs. 14 , 20 , 28–30 ; see also images in Wilson et al. 2009, a site that shows intraspecific color variation in specimens from Chanchamayo, Junín, Peru).

Known distribution. Ecuador, Peru (Junín, Cusco, Madre de Dios), and Bolivia (La Paz) ( Jacobi 1905, Young 1977, McKamey 2007, Wilson et al. 2009).

Material examined. Peru, departments of Cusco and Madre de Dios . Three males and one female, “Peru, Cuzco, Estrada 30 C, \ 26 km W Quicemil [Quincemil] 23 and \ 26.viii.2012, (sweep) \ 13°21’18’’S 70°53’22[’’]W, \ 985m J.A. Rafael & R.R. \ Cavichioli leg.” ( MNRJ); three males and three females, “ Peru , Cuzco, Quicemil [Quincemil] \ 20/ 31.viii.2012, (sweep) \ 13°13’04’’S 70°43’40’[’’]W, \ 613m R.R. Cavichioli leg.” ( DZUP); two males, “ PERU : Cusco, 3 rd km E Quincemil \ 13°13’03’’S 70°43’40’’W 633m \ 20.VIII-01.IX.2012 Malaise \ RR Cavichioli, JA Rafael, APM \ Santos & DM Takiya” ( DZRJ); two males, “ PERU : Cusco, 27 rd km W \ Quincemil 1013m \ 13°21’57’’S 70°53’51’’W \ 23-26.VIII.2012 \ APM Santos & DM Takiya ” ( DZRJ); one male, “ Peru , Cuzco, Capire \ 29.viii.2012, (sweep) \ 13°24’21’’S 70°54’10[’’]W, \ 1270m / R.R. Cavichioli leg.” ( DZUP); one male and one specimen without abdomen, “ PERU : Cusco, Capiri \ 13°25’35’’S 70°54’19’’W \ 1260m 29.VIII.2012 \ APM Santos & DM Takiya ” ( DZRJ); one male, “ PERU : Cusco, Ttio \ 13°31’54’’S 70°53’55’’W \ 2000m \ 25-30.VIII.2012 \ APM Santos & DM Takiya ” ( DZRJ); one male and one female, same data as the preceding except “sweep” ( DZRJ); five females, “ PERU : Madre de Dios, 12 rd \ km E Mazuko , pte. Amanapu \ 13°02’51’’S 70°20’46’’W 382m \ 18.VIII.2012 light \ APM Santos & DM Takiya ” ( DZRJ); three females, same data as the preceding except “pennsyl” ( DZRJ); two males, “ PERU : Madre de Dios, 12 rd \ km E Mazuko , pte. Amanapu \ 13°02’51.1’’S 70°20’45.9’’W \ 382m 18-22.VIII.2012 Malaise \ RR Cavichioli, JA Rafael, APM \ Santos & DM Takiya” ( DZRJ). Additional specimens of this species are deposited in DZRJ and DZUP.

Figures

FIGURES 14–19. Juliaca sertigerula (Jacobi, 1905). Male. 14, head, pronotum, and mesonotum, dorsal view. 15–19, male terminalia. 15, pygofer, lateral view. 16, valve and subgenital plate, ventral view. 17, connective and style, dorsal view. 18, connective, style, and paraphyses, dorsal view. 19, ejaculatory bulb and aedeagus, lateral view.

FIGURES 20–27. Juliaca sertigerula (Jacobi, 1905). Female. 20, body, dorsal view (length 5.2 mm; antennae and legs not depicted). 21, apical portion of abdomen, lateral view. 22, sternite VII, ventral view. 23–27, ovipositor valvula II. 23, general lateral view. 24, teeth at basal portion. 25, teeth at median portion. 26, tooth at apical portion. 27, apex in detail.

FIGURES 28–30. Juliaca sertigerula (Jacobi, 1905). Color variation in specimens from Cusco, Peru (length 5.0–5.1 mm; antennae and legs not depicted). 28, male from Quincenil. 29 and 30, males from Ttio. Females show similar variation.