Onega musa, Ferreira & Lozada & Takiya, 2018

Ferreira, André Luis Diniz, Lozada, Pedro W. & Takiya, Daniela Maeda, 2018, A new species of the sharpshooter genus Onega Distant, 1908 (Hemiptera: Cicadellidae: Cicadellini) from Ecuador and Peru, Revista Brasileira de Entomologia 62 (4), pp. 324-327 : 325-326

Onega musa sp. nov. Ferreira, Lozada & Takiya ( Figs. 1–12 )

Length: males 14.4–14. 6 mm, females: 14.4–15.9 mm.

Diagnosis: Body mostly yellow, with brown maculae distributed on crown, pronotum, and forewings. Concavity on frons only on superior fourth. Posterior margin of male pygofer serrate; with long microsetae at basiventral margin. Aedeagus with shaft bisinuate, with elongate preapical dorsal process (bifurcate or not) and apical acute sinuous process extending beyond gonopore.

Coloration: Crown yellow; margins besides eyes dark brown; median macula dark-brown ( Fig. 1 ). Face yellow, except pairs of maculae on frons at bases of antennae and on genae, light brown ( Fig. 2 ). Pronotum reddish-brown ( Fig. 1 ) with five spots mostly confluent arranged as a “V” on disc and two semi-circular maculae on posterior margin, bright yellow ( Fig. 1 ). Mesonotum bright yellow; lateral basal angles and apical spot, reddish-brown ( Figs. 1–3 ). Forewing mostly bright yellow, with several irregular reddish-brown ( Figs. 1 and 2 ) areas; apex translucent ( Figs. 1–3 ). Hind wing translucent white ( Figs. 1–4 ). Thoracic pleura mostly yellow with few light brown maculae. Legs mostly dark brown ( Figs. 2–4 ). Abdomen mostly red.

External morphology: Crown with median length 3/5 interocular and slightly less than 2/5 transocular width; apical and lateral concave areas on crown not confluent ( Fig. 1 ). Frons mostly flattened, concave only on superior fourth ( Fig. 2 ). Pronotum with posterior margin slightly concave ( Fig. 1 ) or straight ( Fig. 3 ). Forewing with most of corium with plexus of veins, absent on apical, brachial, and costal cells; clavus with crossveins between claval veins ( Figs.1 and 2 ). Hind legs with femoral setal formula 2:1:1; first tarsomeres with length approximately equal to combined length of distal ones. Other external characters as in generic description ( Young, 1977).

Male genitalia: Pygofer moderately produced; posterior margin rounded and serrate; without processes; macrosetae dispersed throughout posterior 2/3; long microsetae restricted to basiventral margin ( Fig. 5 ). Subgenital plate extending slightly posterior to midlength of pygofer; fused basally; with uniseriate macrosetae and fine setae basiventrally ( Fig. 6 ). Connective approximately Vshaped; dorsal keel strongly sclerotized and elongate, extending anteriorly. Style extending posteriorly beyond apex of connective; apex broad and foot-shaped ( Fig. 7 ). Aedeagus with dorsal apodemes robust; shaft elongate and bisinuate, in lateral view, with a non-bifurcated dorsoapical process above the gonopore ( Fig. 8 ); apex with apical acute sinuous process extending beyond gonopore. Paraphyses absent ( Fig. 8 ).

Female genitalia: Sternite VII with posterior margin with shallow median emargination; transverse striations on disc ( Fig. 10 ). Internal abdominal sternite VIII forming simple membranous plate. Pygofer with few macrosetae distributed dorsally on apical third ( Fig. 11 ). First valvula, in ventral view, with base truncate and lateral preapical concavities ( Fig. 12 ). Second valvula bearing 38 non-contiguous teeth ( Fig. 14 ); teeth with denticles distributed on anterior and posterior margin ( Fig. 13 ); apex broadly rounded ( Fig. 15 ). Gonoplac with apex narrowly round; few microsetae on apical margin ( Fig. 11 ).

Variation of paratypes: The general coloration of the Ecuadorian paratype varies in having the yellow tone much brighter; dorsal areas darker brown; median crown macula reddish-brown; frons completely yellow; and pronotum discal spots not confluent ( Figs. 3 and 4 ). In the male genitalia, the Ecuadorian paratype have subgenital plates with lateral macrosetae absent at basal third and aedeagus with dorsoapical process bifurcate and shorter apical process ( Fig. 9 ). Peruvian paratypes may also have bifurcate dorsoapical process. Furthermore, the Ecuadorian paratype has a sclerotized round area on the ventral margin of segment X of anal tube.

Distribution: PERU, Cajamarca Department and ECUADOR, Zamora Chinchipe Province.

Material examined: Holotype, 1 male, “Peru, CA: Cajamarca/06” 8 / 78 ◦ SL 2300 m / 18. X. 1998 / J. Grados ”, MUSM . Paratypes: 2 males and 4 females, same data of holotype, MUSM ; 1 male and 1 female, same data of holotype, DZRJ ; 1 male, “ ECUADOR: Zimbora – Chinchipe / Via Valladolid – Yngana / 2460 m, 10 August 1993, E./Tapia, G. Onore, C. Young ”, CMNH .

Etymology: The specific epithet, in apposition, is in allusion to the similarity of the color pattern of the described species with a ripe banana, fruit belonging to the genus Musa L.

Notes: The new species is very distinct of other Onega by its striking coloration (yellow with brown maculae) and its aedeagal shape with a unique dorsoapical process. The new species keys to couplet 7 in Takiya and Cavichioli (2004) ’s key to species of Onega , but it will not proceed further.

Figures

Figs. 1–4. Onega musa sp. nov.: (1–2) holotype; (1) dorsal habitus; (2) lateral habitus; (3–4) paratype from Ecuador; (3) dorsal habitus; (4) lateral habitus. Scale bars =2 mm.

Figs. 5–15. Onega musa sp. nov.: (5–9) male genitalia; (5) pygofer, valve, and subgenital plate, lateral view; (6) valve and subgenital plates, ventral view; (7) style and connective, ventral view; (8) aedeagus holotype, lateral view; (9) aedeagus of paratype from Ecuador, lateral view; (10–16) female genitalia; (10) sternite VII, ventral view; (11) sternite VII, pygofer, and gonoplac, lateral view; (12) bases of first valvulae of ovipositor, ventral view; (13) denticles from median portion of shaft of second valvula of ovipositor, lateral view; (14) second valvula of ovipositor, lateral view; (15) apex of second valvula of ovipositor, lateral view. Scale bars: 0.5mm (5–12); 0.2 mm (14); 0.1 mm (13–15).