Gibbocicada brasiliana, Ruschel, 2018

Ruschel, Tatiana Petersen, 2018, Gibbocicada brasiliana, new genus and new species from Brazil and a key for the genera of Tibicinini (Hemiptera: Auchenorrhyncha: Cicadidae), Acta Entomologica Musei Nationalis Pragae 58 (2), pp. 559-566 : 564

Gibbocicada brasiliana sp. nov.

( Figs 2–18 )

Type locality. Brazil, Ceará state, Mucambo municipality, Carquejo village, ca. 3°52′S, 40°44′W.

Type material. HOLOTYPE:, ʻBRAZIL / Carquejo / Est Ceará / Dirings // IV 1960 ʼ ( MZSP, dry-mounted ona pin; Fig. 2 ). PARATYPES: 2 1 ♀, same data as the holotype ( MZSP) .

Description. Male. Bodycoloration greenish yellow ( Fig. 2 ), only the head with black markings.

Head. Vertex with transverse black band departing from each eye, surrounding the ocelli and extending to the posterior area behind the eyes. Eyes rounded, slightly projecting laterally beyond anterior angles of pronotum. Lateral ocelli widely separated and laterally projected, higher than median ocellus in frontal view ( Fig. 6 ). Postclypeus unstained, with ten transverse grooves. Central sulcus shallow and slender. Anteclypeus and carina tawny, apex half-moon shaped. Lorum with several silver setae ( Fig. 7 ). Labium long, reaching the metacoxae ( Fig. 8 ).

Thorax. Pronotum ( Fig. 6 ) with lateral and sub-lateral lobes with wrinkles. Mesonotum ( Fig. 2 ) with submedian andlateral sigillae slightly stained in pale green. Operculum ( Fig. 9 ) broad, widely spacedbythe metacoxae, and laterally directed; posterior margin slightly convex, lateral margin very short. Meracanthus large, coveringthe internal angle of operculum in dorsal view. Proximal margins of metacoxae forming acute projections ( Fig. 8 ). Wings hyaline. Fore wings ( Figs 2–3 ): basal cell slightly smoky, twice as long as wide; posterior vein ofbasal cell arched; cubitus anterior vein slightly concave; cubital cell wider than clavus; medial cell twice as long as the ulnar cell 3, almost half of the length of fore wing; radius anterior vein closely aligned with subcosta for its length, divergent at apex; median vein long, reaching half thelength of radial cellproximal to M3+4 fork; apical cell 1 longer than any other apical cell.

Abdomen ( Fig. 2 ) subcylindrical, fusiform, short, the length equal to the combined length of head and thorax in dorsal view. Timbals elongate laterally, posteriorly directed, anterior margin of the same length as anterior margin of tergite 1 ( Fig. 10 ). Sternite VII subrectangular, with posterior margin concave and slightly emarginated; sternite VIII triangular ( Fig. 11 ).

Genitalia ( Figs 12–14 ). Pygofer distalshoulder undeveloped. Basal lobe of pygofer long, reaching uncus. Uncus long with setae, tapering to apex, thelateralmargins folding to aedeagus. Aedeagus broad, taperingto apex. Theca with ventral branches, apex of theca beak-shaped in lateral view, dorsally grooved and bifurcated on the anterior margin, with wrinkles. Vesica originating in a fissure from basal plate to the distal third of the theca. Apex of theca with two slender sclerotized branches closely spaced on the fissure of vesica.

Female ( Figs 15–18 ). Same characteristics as in the male, but body a little more yellowish ( Fig. 15 ). Operculum similar to that of the male, with the lateral margin very short and posterior margin slightly convex ( Fig. 16 ). Meracanthus large, longer than operculum, covering the internal angle of operculum in dorsal view ( Fig. 16 ). Sternite VII longer than any other, posterior margin with an obtuse middle groove reaching more than half of sternite, formingtwo lobes ( Fig. 17 ). Lateral margins of abdominal segment 9 touching medially ( Fig. 17 ). Ovipositor sheath shorter than tip of dorsal beak ( Fig. 18 ).

Measurements (in mm). Males (n = 3, values for the holotypein parentheses) lb 23.0–25.1 (25.1); wh 6.21–6.66 (6.48); lh 1.08–1.26 (1.17); wp 7.56–8.28 (8.28); lp 3.33–3.96 (3.96); wm 6.48–6.93 (6.93); lm 4.23–4.77 (4.77); lfw 31.1–34.6 (34.6); wfw 11.3–12.9 (12.9); lhw 18.3–20.3 (20.3); whw 7.7–8.8 (8.6). Female (n = 1): lb 26.8; wh 6.66; lh 1.26; wp 8.46; lp 3.78; wm 7.2; lm 5.13; lfw 34; wfw 13; lhw 19.6; whw 8.8.

Etymology. The name refers to the country of the type locality. Adjective.

Distribution. Brazil (Ceará).

Figures

Figs 2–11. Gibbocicada brasiliana gen. et sp. nov., holotype, male. 2 – habitus in dorsal view; 3 – wings in dorsal view (arrow points to the basal third of CuP and 1A which are unfused); 4 – detail of hind wing veins in dorsal view (arrow points to veins RP and M which are unfused at their bases); 5 – habitus in lateral view (wings not extended); 6 – head and pronotum in dorsal view; 7 – postclypeus in ventral view; 8 – thorax in ventral view; 9 – operculum in latero-ventral view; 10 – timbal in latero-ventral view; 11 – sternites VII and VIII in ventral view.Abbreviations: 1A – anal vein, CuA – cubitus anterior vein, CuP – cubitus posterior vein, M – median vein, mc – meracanthus, op – operculum, RP – radius posterior vein, tim – timbal, tymc – tympanal cavity, st – sternite. Scale bars: 2 – 2 cm; 3, 5 – 5 mm; 6–8, 11 – 2 mm; 4, 9, 10 –1 mm.

Figs 12–14. Gibbocicada brasiliana gen. et sp. nov., paratype, male. 12 – Pygofer, uncus and aedeagus, in latero-ventral view; 13 – same, in lateral view; 14 – aedeagus in ventral view. Abbreviations: aed – aedeagus, as – anal styles, at – anal tube, bl – basal lobe, pyg – pygofer, un – uncus, vb – ventral branches, ve – vesica, vbp – ventrobasal pocket. Scale bars: 12, 13 – 1 mm; 14 – 0.5 mm.

Figs 15–18. Gibbocicada brasiliana gen. et sp. nov., paratype, female. 15 – habitus in dorsal view; 16 – operculum in latero-ventral view; 17 – sternite VII, abdominal segment 9 and ovipositor sheath in ventral view; 18 – tergites 5–9 in lateral view.Abbreviations: ab9 – abdominal segment 9, db – dorsal beak, mc – meracanthus, op – operculum, os – ovipositor sheath, st – sternite. Scale bars: 15 – 2 cm; 16 – 1 mm; 17, 18 – 2 mm.