Rosalydia xavieri, Gonçalves & Viegas, 2022

Gonçalves, Clayton Corrêa & Viegas, Eduarda Fernanda Gomes, 2022, Rosalydia, a new genus of Neocoelidiinae (Hemiptera: Cicadellidae) from Brazilian Amazon, with description of three new species, Zootaxa 5093 (5), pp. 559-568 : 564-567

Rosalydia xavieri gen. et sp. nov.

Figs 5–6 , 26–36

Diagnosis. Pygofer, in lateral view ( Fig. 28 ), subtrapezoidal, dorsoapical margin expanded dorsoposteriorly and curved ventrally at apex, inner caudal process ( Figs 28–29 ) adjacent to posterior margin and not surpassing the ventral margin, apex subtly bifurcated; subgenital plates, in ventral view ( Fig. 31 ), slightly compressed on middle third, inner margin with about 20 teeth being larger and more sclerotized toward apex; aedeagus ( Figs 34–36 ) with pair of rounded lateral expansions in basal third with serrated margins, subapical processes very short, spine-like.

Measurements (mm). Male holotype: total length 6.9.

Coloration. Body yellow ( Figs 5–6 ), green in life. Crown ( Fig. 5 ) with four inconspicuous orange stripes, three longitudinal and one transverse forming E-shaped macula. Face ( Fig. 26 ) uniform yellow. Forewing ( Fig. 27 ) semihyaline, anal margin and adjacent portion dark yellow.

External morphology. External morphological characters as in generic description.

Male terminalia. Pygofer, in lateral view ( Fig. 28 ), subtrapezoidal, longer than high; ventral margin straight; dorsoapical margin expanded dorsoposteriorly, curved ventrally with acute apex; few short setae scattered apically; inner caudal process short and adjacent to posterior margin, not surpassing the ventral margin, in posterior view ( Fig. 29 ), curved inward, narrowing slightly towards apex, inner margin serrated on middle third, apex subtly bifurcated. Subgenital plate, in lateral view ( Fig. 30 ) approximately 3.7 times longer than maximum height; wide at base and narrowing towards apex; apical half curved dorsally at an angle of approximately 135 degrees; in ventral view ( Fig. 31 ), each plate subrectangular, slightly compressed on middle third; inner margin with about 20 teeth on apical half, being larger and more sclerotized toward apex; apex acute. Connective ( Fig. 32 ) approximately half length of style. Aedeagus ( Figs 34–36 ) with pair of rounded lateral expansions in basal third with serrated margins; shaft slightly sinuous, tapered in apical two-thirds and laterally compressed in apical region; subapical processes very short; apex acutely rounded. Anal tube ( Fig. 28 ) with tergite X 2.5 times longer than wide.

Female terminalia. Female unknown.

Material examined. Holotype ♂: “ Brasil, AM, Atalaia do\ Norte , PEF Palmeiras do\ Javari; 5°8.16’S, 72°48.72’W;\ 19-21.ii.2018; Arm. Pano\ branco; M.L. Oliveira & F.F.\ Xavier F° legs.” ( INPA).

Etymology. The Rosalydia xavieri gen. et sp. nov. is a tribute to the collector Francisco Felipe Xavier Filho, affectionately known as “Chiquinho”, an expert collector of neotropical insects, mainly from the Brazilian Amazonian entomofauna.

Remarks. Among the known species for the genus, Rosalydia xavieri gen. et sp. nov. has the most differentiated characteristics of the male terminalia: the caudal process of the pygofer is short, not exceeding the ventral margin ( Fig. 22 ); the subgenital plates have the inner margin with teeth increasing in size towards apex ( Fig. 25 ); and the aedeagus has a pair of expansions in the basal third ( Figs 28–30 ).

Figures

FIGURES 1–6. Habitus, dorsal and lateral views, respectively. 1 and 2, Rosalydia alvarengai gen. et sp. nov., holotype male. 3 and 4, R. inpa gen. et sp. nov., holotype male. 5 and 6, R. xavieri gen. et sp. nov., holotype male. Scale bars = 2.0 mm.

FIGURES 26–36. Rosalydia xavieri gen. et sp. nov., holotype male: 26, head, frontal view; 27, forewing; 28, pygofer and anal tube, lateral view; 29, process of pygofer, caudal view; 30, valve and subgenital plates, lateral view; 31, valve and subgenital plates, ventral view; 32, connective and style, dorsal view; 33, style, lateral view; 34, aedeagus, lateral view; 35, aedeagus, caudal view; 36, aedeagus, dorsal view. Scale bars: 26 = 1.0 mm, 27 = 2.0 mm, 28–36 = 0.5 mm.

FIGURES 16–25. Rosalydia inpa gen. et sp. nov., holotype male: 16, head, frontal view; 17, forewing; 18, pygofer and anal tube, lateral view; 19, process of pygofer, caudal view; 20, valve and subgenital plates, lateral view; 21, valve and subgenital plates, ventral view; 22, connective and style, dorsal view; 23, style, lateral view; 24, aedeagus, lateral view; 25, aedeagus, caudal view. Scale bars: 16 = 1.0 mm, 17 = 2.0 mm, 18–25 = 0.5 mm.