Rosalydia, 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 : 560-567

Rosalydia gen. nov.

Figs 1–36

Type-species. Rosalydia xavieri gen. et sp. nov., by present designation.

Diagnosis. Medium-sized cylindrical leafhoppers; head ( Figs 1–6 ), moderately produced anteriorly, crownface transition angled, with marginal carina; crown ( Figs 1, 3, 5 ) subpentagonal, with four orange stripes, three longitudinal and one transverse forming E-shaped macula; lateral margins of crown ( Figs 2, 4, 6 ), adjacent to eyes, raised and not carinate; ocellus ( Figs 2, 4, 6 ) on anterior margin of head, distant from eye margin; pronotum ( Figs 1, 3, 5 ) acutely emarginate; forewing ( Figs 17 , 27 ) with venation indistinct, except in apical portion, with four apical and three anteapical cells; male pygofer ( Figs 8 , 18 , 28 ) with dorsoapical margin expanded and produced dorsally or posteriorly, caudal margin with process on inner surface or contiguous to posterior margin; subgenital plates ( Figs 10–11 , 20–21 , 30–31 ) fused together only at base, inner margin with several sclerotized teeth; connective ( Figs 12 , 22 , 32 ) Y-shaped; style ( Figs 13 , 23 , 33 ) with tooth below hooked apex; aedeagus ( Figs 14–15 , 24–25 , 34–36 ) with shaft long and slender, with pair of short preapical processes, gonopore apical.

Etymology. The generic name Rosalydia (feminine noun), is a tribute to the Dipterologist Profa. Dra. Rosaly Ale-Rocha for their friendship and importance for the scientific development of the authors of this paper. We are grateful to Dra. Rosaly for being our advisor in the Graduate Program in Entomology at Instituto Nacional de Pesquisas da Amazônia.

Description. Head, in dorsal view ( Figs 1, 3, 5 ), moderately produced anteriorly, median length of crown approximately equal to or slightly less than interocular width; transocular width about six-sevenths of humeral width of pronotum; crown subpentagonal, anterior margin bluntly angulate, surface flat and smooth; ocellus on anterior margin of head, distant from eye margin, not visible in dorsal view; coronal maculae and coronal suture indistinct. Head, in frontal view ( Figs 7 , 16 , 26 ), with face approximately as high as wide; frontogenal suture reaching to ocelli; antennal ledge oblique and carinate; frons approximately 1.3 times longer than wide; muscle impressions indistinct; epistomal suture distinct, complete and straight; clypeus approximately 1.6 times longer than maximum width, lateral margins parallel, apex straight; maxillary plate produced ventrally, slightly surpassing the clypeus apex; lorum ellipse-shaped, apical margin not reaching apex of clypeus; gena incompletely covering episternum. Head, in lateral view ( Figs 2, 4, 6 ), with crown-face transition acute, with marginal carina; lateral margins of crown, adjacent to eyes, raised and not carinated; antennal pits at same level as imaginary line tangent to anteroventral angles of eyes; antenna with long flagellum, exceeding half length of forewing; frons convex. Pronotum ( Figs 1, 3, 5 ) with slightly transverse striae on disc; lateral margins rounded, convergent anterad, as long as eye; posterior margin acutely excavated; in lateral view ( Figs 2, 4, 6 ), slightly declivous; dorsopleural carina present and arched. Mesonotum ( Figs 1, 3, 5 ) as long as wide. Forewing ( Figs 17 , 27 ) semi-hyaline, approximately 3.2 times longer than maximum width; venation slightly distinct, more distinct apically; three anteapical and four apical cells, bases of second and fourth apical cells approximately equidistant, base of third apical cell more distal than basis of second and fourth apical cells; alar appendix narrow; apex rounded. Hind wing with vein R 4+5 and M 1+2 preapically convergent, fused at apex, forming single vein. Profemur with AD, AM, and PD rows reduced and poorly defined, with exception of apical setae AD 1, AM 1, and PD 1, respectively; AV formed by a single apical seta; PV row absent; IC row formed by slightly arched comb of fine setae, beginning at distal half of femur and extending to apex. Protibia, in cross-section, semi-circular; AV row formed by approximately 15 setae, slightly longer and thicker towards apex; AD formed by a single apical seta; PD formed by two setae, one at beginning of apical third and another at apex; PV row with 2–3 widely spaced setae. Metafemur with setal formula 2:2:1, with inner seta of second pair reduced in size. Metatibial AD row with 2– 5 intercalary setae between macrosetae; PD, AD, and PV rows with 17–18, 9–11, and 40–42 macrosetae, respectively; AV row with approximately 5–6 macrosetae distributed only in the middle third of tibia. Metatarsomere I longer than combined length of two distal tarsomeres; plantar surface with two rows of setae, external row with longer and robust setae than inner row; pecten with five platellae. Metatarsomere II pecten with three platellae.

Male terminalia. Pygofer ( Figs 8 , 18 , 28 ) shorter than subgenital plates; macrosetae absent; dorsoapical margin expanded and produced dorsally or dorsoposteriorly; presence of caudal process on inner surface or contiguous to posterior margin, directed ventrally ( Figs 9 , 19 , 29 ). Valve ( Figs 11 , 21 , 31 ) completely fused to subgenital plates. Subgenital plates, in lateral view ( Figs 10 , 20 , 30 ), moderate to deeply excavated, dorsally curved from apical half; in ventral view ( Figs 11 , 21 , 31 ), fused together only at base; inner margin with several sclerotized teeth; macrosetae absent. Connective ( Figs 12 , 22 , 32 ) Y-shaped, arms approximately twice the length of stem; stem articulated at aedeagus base, not bifurcated at point of articulation. Style ( Figs 12–13 , 22–23 , 32–33 ) with apodeme non-bilobed; preapical lobe undeveloped; preapical setae present; apex curved ventrally, hook-shaped, with irregular ventral margin bearing a small sclerotized tooth. Aedeagus ( Figs 14–15 , 24–25 , 34–36 ) with dorsal apodeme and preatrium elongate; shaft very long and slender, flattened dorsoventrally, directed dorsally, with pair of short lateral preapical processes directed ventrally; gonopore apical. Anal tube ( Figs 8 , 18 , 28 ) cylindrical, without process; ventral surface membranous.

Female terminalia. Female unknown.

Distribution. Brazil: Amazonas and Mato Grosso.

Remarks. Rosalydia gen. nov. is externally very similar to species of Coelidiana Oman, 1936 , Paracoelidiana Marques-Costa & Cavichioli, 2007 , Scopocoelidia Marques-Costa & Cavichioli, 2007 and Mejdalania Gonçalves, 2021. However, the presence of caudal process on inner surface or contiguous to posterior margin of pygofer ( Figs 8 , 18 , 28 ) and several sclerotized teeth on the inner margins of the subgenital plates ( Figs 10–11 , 20–21 , 30–31 ) are unique characteristics that separate the new genus from all other known Neocoelidiinae .

Key to species of Rosalydia gen. nov.

1. Pygofer, with short caudal process, not surpassing the ventral margin ( Fig. 28 ); subgenital plates with teeth of inner margin increasing in size towards apex ( Fig. 31 ); aedeagus with pair of expansions in basal third ( Figs 34–36 ) (Amazonas)....................................................................................... R. xavieri gen. et sp. nov.

- Pygofer, with long caudal process, surpassing the ventral margin ( Figs 8 , 18 ); subgenital plates with teeth of inner margin approximately regular in size ( Figs 11 , 21 ); aedeagus without pair of expansions in basal third ( Figs 14 , 24 )............. 2

2. Pygofer subquadrangular, dorsoapical margin expanded dorsally, forming rounded lobe, caudal process with spine on basal portion, apex bifurcated ( Figs 8–9 ); subgenital plates with lateral margins converging towards apex ( Fig. 11 ); aedeagus with subapical processes slightly dilated apically with crenulated dorsoapical margin ( Figs 14–15 ) (Mato Grosso)......................................................................................... R. alvarengai gen. et sp. nov.

- Pygofer subtrapezoidal, dorsoapical margin expanded dorsoposteriorly and curved ventrally at apex, caudal process without spine on basal portion, apex not bifurcated, with several rugosity ( Figs 18–19 ); subgenital plates broad in basal half and distinctly narrowed in apical half ( Fig. 21 ); aedeagus with subapical processes very short, spine-like ( Figs 24–25 ) (Amazonas)........................................................................................ R. inpa gen. et sp. nov.

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.

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.