Rosalydia alvarengai, 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 : 562

Rosalydia alvarengai gen. et sp. nov.

Figs 1–2 , 7–15

Diagnosis. Pygofer, in lateral view ( Fig. 8 ), subquadrangular, dorsoapical margin expanded dorsally, forming rounded lobe, caudal process ( Figs 8–9 ) contiguous to posterior margin and surpassing the ventral margin, basal portion of process with spine, apex bifurcated; subgenital plates, in ventral view ( Fig. 11 ), subtriangular, with lateral margins converging towards apex, apical three-fourths of inner margin with about 30 teeth approximately regular in size; aedeagus ( Figs 14–15 ) with shaft medially compressed, subapical processes slightly dilated apically and with crenulated dorsoapical margin.

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

Coloration. Body yellow ( Figs 1–2 ), green in life. Crown ( Fig. 1 ) with four orange stripes, three longitudinal and one transverse forming E-shaped macula. Face ( Fig. 7 ) uniform yellow. Forewing ( Figs 1–2 ) semi-hyaline.

External morphology. External morphological characters as in the generic description.

Male terminalia. Pygofer, in lateral view ( Fig. 8 ), subquadrangular, slightly higher than long; ventral margin straight; dorsoapical margin expanded dorsally, forming rounded lobe; few short setae scattered dorsoapically; caudal process contiguous to posterior margin and surpassing ventral margin, basal portion with spine on posterior margin, in posterior view ( Fig. 9 ), process approximately straight and of constant width along entire length, apex bifurcated. Subgenital plate, in lateral view ( Fig. 10 ) approximately 4 times longer than its maximum height; high at base and narrowing subtly and progressively towards apex; in ventral view ( Fig. 11 ), each plate subtriangular, broad at base and narrowing towards apex; apical three-fourths of inner margin with about 30 teeth approximately regular in size; apex rounded. Connective ( Fig. 6 ) approximately two-thirds length of style. Aedeagus, in lateral view ( Fig. 14 ), with shaft slightly sinuous, tubular on basal third and flattened dorsoventrally on apical two-thirds; in caudal view ( Fig. 15 ), shaft medially compressed; subapical processes slightly dilated apically and with crenulated dorsoapical margin; apex broadly rounded. Anal tube ( Fig. 8 ) with tergite X twice longer than wide.

Female terminalia. Female unknown.

Material examined. Holotype ♂: “ Sinop , Mato Grosso \ Brasil, X-1975 \ M. Alvarenga leg.” ( DZUP).

Etymology. The Rosalydia alvarengai gen. et sp. nov. is a tribute to the collector. Moacyr Alvarenga was an officer of the Brazilian Air Force that traveled around Brazil collecting in several places never studied before. The large number of Brazilian insects collected by him are currently represented in many museum collections around the world.

Remarks. Rosalydia alvarengai gen. et sp. nov. resembles R. inpa gen. et sp. nov. in having the caudal process of the pygofer surpassing the ventral margin ( Figs 8 , 18 ); subgenital plates with all teeth of the inner margin approximately the same size ( Figs 11 , 21 ); and aedeagus unexpanded on the basal third ( Figs 14 , 24 ). However, Rosalydia alvarengai gen. et sp. nov. is easily differentiated from the other species by the diagnostic characteristics mentioned above.

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 7–15. Rosalydia alvarengai gen. et sp. nov., holotype male: 7, head, frontal view; 8, pygofer and anal tube, lateral view; 9, process of pygofer, caudal view; 10, valve and subgenital plates, lateral view; 11, valve and subgenital plates, ventral view; 12, connective and style, dorsal view; 13, style, lateral view; 15, aedeagus, lateral view; 15, aedeagus, caudal view. Scale bars: 7 = 1.0 mm, 8–15 = 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.