Nannicerus Maldonado-Capriles, 1977

Guimarães, Daniel Lucas Praciano & Rafael, José Albertino, 2022, Redescription of Nannicerus Maldonado-Capriles, 1997 (Hemiptera: Cicadellidae: Eurymelinae: Chiasmdolini) and description of two new species from North Brazil, Zootaxa 5169 (3), pp. 286-296 : 287-288

Nannicerus Maldonado-Capriles, 1977

Nannicerus Maldonado-Capriles, 1977 a: 605 ; 1984: 99; Xue & Zhang, 2018: 185; Xue, Dietrich & Zhang, 2020: 696.

Type species: Nannicerus gracilis Maldonado-Capriles, 1977 , by monotypy.

Coloration. Male: Crown light yellow, vitreous area well defined, extended on anterior margin of crown, with orange or black spots close to eyes ( Figs. 1–3 , 15–17 , 31–33 ). Ocellus gray; eye gray or dark gray ( Figs. 2 , 16 , 32 ). Frons light yellow, with median orange or black macula, two orange or black macula close to eyes, and double row of orange or black macula at basal region ( Figs. 2 , 16 , 32 ). Lorum and gena light yellow; gena with an irregular brown or dark brown macula close to lorum, with a distinctive vitreous area in median region ( Figs. 2 , 16 , 32 ). Pronotum light yellow ( Figs. 1, 3 , 15, 17 , 31, 33 ). Scutellum light yellow with brown or black laterobasal triangles, with a pair of brown or black macula in median region ( Figs. 1, 3 , 15, 17 , 31, 33 ). Thorax light yellow laterally; epimeron dark yellow or black with apex light yellow; ventrally light yellow; legs light yellow with or without black macula at median region; apex of tibiae brown ( Figs. 4 , 18 , 34 ). Forewing brown ( Figs. 5 , 19 , 35 ). Abdomen with tergite black with posterior portion with a wide light yellow band; sternite black with posterior portion with a wide light yellow band. Pygofer light brown or black with posterior margin light yellow. Subgenital plates black with posterior margin light brown.

Redescription. Males: total length 3.81–6.89 mm.

Head width slightly wider (1.2x) than pronotal width; with anterior and posterior margins superficially curved; surface finely shagreened ( Figs. 3 , 17 , 33 ). Eye reniform in dorsal view ( Figs. 3 , 17 , 33 ). UFS oblique, medially curved ( Figs. 2 , 16 , 32 ). Frons, clypeus, lorum and gena shagreen; frons convex; gena with setae below each eye, lateral margins slightly sinuate ( Figs. 2 , 16 , 32 ). Rostrum long ( Figs. 4 , 18 , 34 ). Pronotum with lateral surface rugose, without pubescence; 0.6x as long as wide, posterior margin slightly concave ( Figs. 3 , 17 , 33 ). Scutellum shagreen; with a concave area at median region in lateral view; apical half rugose ( Figs. 3 , 17 , 33 ). Forewing with four apical cells, second apical cell without cross-vein ( Figs. 5 , 19 , 35 ). Sternite II with a pair of apodemes, subtriangular with rounded apex ( Figs. 6 , 20 , 36 ).

Pygofer triangular with longitudinal fracture at upper margin, membranous on posterior portion, ventral margin concave ( Figs. 7 , 21 , 37 ). Subgenital plate reniform, in lateral view; triangular, in ventral view; internal concave basal region V-shaped; apex dorsally curved and rounded; internal margin with long macrosetae; external margin with several long microsetae ( Figs. 8, 9 , 22, 23 , 38, 39 ). Connective 1/3 shorter than style, Y-shaped; median region concave, lateral arms and apex dorsally projected; apical shaft strong ( Figs. 10 , 24 , 40 ). Style slender and long; apodeme flattened laterally; preapical lobe present, with microsetae at apex; apophysis strong and long, with apex ventrally directed ( Figs. 10, 12 , 24, 26 , 40, 42 ). Aedeagus with dorsal apodeme short, apex posteriorly projected; preatrium well developed; atrium robust; gonopore apical ( Figs. 13, 14 , 28, 29 , 44, 45 ). Anal tube with a hook shaped process ( Figs. 7 , 21, 30 , 37, 46 ).

Distribution. Guyana, Brazil.

Remarks. In the original description, Maldonado-Capriles (1977 a) described Nannicerus being characterized by the forewing with no anteapical cell. However, we identified the presence of two anteapical cells in the Brazilian specimens collected, including in specimens of N. gracilis ( Fig. 5 ).

Figures

FIGURES 1–4. Nannicerus gracilis Maldonado-Capriles, 1977, male.Yellow lines in Figs.1 and 3 used to indicate the triangular shape of head in dorsal view. 1, body, dorsal view. 2, head and thorax anteroventral view. 3, head and thorax, dorsal view. 4, body, lateral view. Scale bar: 2–3= 0.5 mm, 1, 4= 1.0 mm.

FIGURES 15–18. Nannicerus curica sp. nov., male holotype. 15, body, dorsal view. 16, head and thorax, anteroventral view. 17, head and thorax, dorsal view. 18, body, lateral view. Scale bar: 16–17= 0.5 mm, 15,18= 1.0 mm.

FIGURES 31–34. Nannicerus grandis sp. nov. male holotype. 31, body, dorsal view. 32, head and thorax ventral view. 33, head and thorax, dorsal view. 34, body, lateral view. Scale bar: 32–33: 0.5 mm, 31,34: 1.0 mm.

FIGURES 5–14. Nannicerus gracilis Maldonado-Capriles, 1977, male. 5, forewing. 6, apodemes of sternite II, dorsal view. Male genitalia: 7, pygofer, lateral view. 8, subgenital plate, lateral view. 9, subgenital plate, ventral view. 10, connective and style, dorsal view. 11, connective, lateral view. 12, style, lateral view. 13, aedeagus, lateral view. 14, aedeagus, posterior view. Anl.: anal tube; Ap: apodeme of style; Aph: apophysis; Apo: apodeme of sternite II; Atr: atrium; Bp: basal projection; Dap: dorsal apodeme; Gnd: gonoduct; Gnp: gonopore; Lbp: laterobasal process; Pat: preatrium; Sg X: segment X; Sg XI: segment XI; Shf: aedeagal shaft; St II: sternite II. Scale bar: 5= 1 mm; 6–14= 0.2 mm.

FIGURES 19–30. Nannicerus curica sp. nov. male holotype. 19, forewing. 20, apodemes of sternite II, dorsal view. Male genitalia: 21, pygofer, lateral view. 22, subgenital plate, lateral view. 23, subgenital plate, ventral view. 24, connective and style, dorsal view. 25, connective, lateral view. 26, style, lateral view. 27, aedeagus, lateral view. 28, aedeagus, posterior view. 29, aedeagus shaft in detail, posterior view. 30, laterobasal process of anal tube in detail, posterior view. Scale bar: 19= 1 mm; 20–30= 0.2 mm.

FIGURES 35–46. Nannicerus grandis sp. nov. male holotype. 35, forewing. 36, apodemes of Sternite II, dorsal view. Male genitalia: 37, pygofer, lateral view. 38, subgenital plate, lateral view. 39, subgenital plate, ventral view. 40, connective and style, dorsal view. 41, connective, lateral view. 42, style, lateral view. 43, aedeagus, lateral view. 44, aedeagus, posterior view. 45, aedeagus shaft in detail, posterior view. 46, laterobasal process of anal tube in detail, posterior view. Scale bar: 35= 1 mm; 36–46: 0.2 mm.