Fonsecaiulus filiformis, Felix, Marcio, Antunes, Cauan, Carvalho, Rachel A. & Mejdalani, Gabriel, 2015

Felix, Marcio, Antunes, Cauan, Carvalho, Rachel A. & Mejdalani, Gabriel, 2015, Three new species of Fonsecaiulus (Hemiptera, Cicadellidae, Cicadellini) from Brazil and key to species of the genus, ZooKeys 526, pp. 131-144 : 138-139

Taxon classification Animalia Hemiptera Cicadellidae

Fonsecaiulus filiformis sp. n. Fig. 4

Diagnosis.

Fonsecaiulus filiformis sp. n. is characterized by the combination of the following features: (1) dorsum (Fig. 4a) with broad pale yellow median stripe extending from apex of crown to apex of clavus; (2) connective (Fig. 4e, f) with median keel strongly produced dorsally; (3) aedeagus (Fig. 4f) with shaft long and slender, dorsally curved, with long and acute apical process continuing its shape; (4) paraphyses (Fig. 4g) with Y-shaped basal plate with arms widely divergent and pair of long and slender rami.

Etymology.

The specific epithet, filiformis, refers to the shape of the aedeagus in lateral view.

Description.

Length. Male holotype, 5.6 mm.

Male holotype. Head and thorax. Head (Fig. 4a, b) with median length of crown slightly less than 7/10 interocular width and slightly less than 4/10 transocular width; ocelli located slightly behind a line between anterior eye angles; frons slightly flattened medially, muscle impressions distinct; epistomal suture complete; clypeus with contour continuing profile of frons. Pronotum (Fig. 4a, b) with width less than transocular width; lateral margins parallel. Forewings with inner and median anteapical cells opened basally. First tarsomere (Fig. 4b) with length approximately equal to combined length of two more distal tarsomeres. Remaining morphological characteristics of head and thorax as in the generic description of Young (1977: 760-763).

Male genitalia. Pygofer (Fig. 4c) broadly convex posteriorly, posterodorsal portion slightly produced, without processes. Valve (Fig. 4d) broad and very short, subrectangular. Subgenital plates (Fig. 4d) narrow on apical three-fourths; dorsal surface with two minute, sclerotized dentiform processes on median portion, near which apical portion of styles rests; basal portion with few short macrosetae along outer margin; few very short microsetae on apical half. Styles (Fig. 4e, f) with outer preapical por tion with long sparse setae; apex directed outwards. Connective (Fig. 4e, f) with arms short in dorsal view; stalk moderately elongate, with strongly produced median keel. Aedeagus (Fig. 4f, g), in lateral view, with shaft long and slender, dorsally curved; apex with long and acute process continuing shape of shaft, extending dorsally beyond pygofer border; gonopore ventral; dorsal apodemes long and slightly curved posteriorly. Paraphyses (Fig. 4f, g) symmetrical, basal plate Y-shaped and arms widely divergent; rami articulated to basal plate, long and slender, with apex acute, extending posteriorly beyond pygofer border; each ramus, in lateral view, sinuous, slightly curved dorsally and then slightly curved ventrally.

Color. Dorsum anteriorly brown to yellowish-brown with broad pale yellow median stripe extending from apex of crown to apex of clavus (Fig. 4a, b); stripe occupying approximately one-third of posterior margin of crown, with lateral margins sinuous on clavus. Crown (Fig. 4a) with pair of small pale yellow spots on antennal ledges and another pair adjacent to outer margin of ocelli; subtriangular pale yellow marks adjacent to inner eye angles. Pronotum (Fig. 4a, b) with narrow, median yellowish-brown stripe on pale yellow broad stripe; humeral areas reddish-brown. Forewings (Fig. 4a, b) with basal portion dark brown, median portion and most of corium veins reddish-brown, apical portion pale brown; minute pale yellow spot beyond middle of costal margin and another on apex of brachial cell. Face pale yellow. Frons with median portion bordered by pair of longitudinal narrow brown stripes, connected to each other on dorsal median portion of clypeus, then extending ventrally as a median stripe; narrow transverse brown stripes along muscle impressions. Antennal ledges (Fig. 4b), in lateral view, almost entirely brown. Thoracic sclerites (Fig. 4b) mostly pale yellow; lateral lobe of pronotum, mesepimeron, and mesepisternum dorsally dark brown. Legs (Fig. 4b) mostly pale yellow. Thoracic sternum mostly pale yellow.

Female unknown.

Type specimen.

Brazil, Goiás State. Holotype: male, "Brasil, GO, Alto Paraíso \ de Goiás, Parque \ Nacional da Chapada dos \ Veadeiros, trilha para \ canion"; " S14°10'5", W47°49'16" \ 941m 25.X.2013 sweep \ DM Takiya, BM Camisão \ e CC Gonçalves leg." (DZRJ).

Remarks.

Fonsecaiulus filiformis sp. n. (Fig. 4a, b) is very similar to Fonsecaiulus dorsifascia (Fig. 4h) in color pattern and male structures. Only these two species have a broad, median pale yellow stripe on dorsum. In the new species the lateral margins of the stripe are sinuous on forewings, whereas in Fonsecaiulus dorsifascia they are triangularly emarginated.

In the male genitalia, the pygofer and subgenital plates are very similar in both species. The apical portion of the styles in Fonsecaiulus filiformis differs from that of Fonsecaiulus dorsifascia . In the former species, the preapical lobe is more produced (Fig. 4e) than in the latter ( Young 1977: fig. 624e). The paraphyses of the new species are similar to those of Fonsecaiulus dorsifascia . The aedeagi are strongly curved dorsally in both species. However, Fonsecaiulus filiformis has a regularly very narrow aedeagus in lateral view (Fig. 4f), while Fonsecaiulus dorsifascia has the aedeagal shaft broader ( Young 1977: fig. 624f).