Erythrogonia dmitrievi, Quintas & Silva & Takiya & Mejdalani, 2025

Quintas, Victor, Silva, Adriane P., Takiya, Daniela M. & Mejdalani, Gabriel, 2025, Exploring the diversity of leafhoppers from Brazil: five new species of Erythrogonia Melichar (Insecta: Hemiptera: Cicadellidae: Cicadellini), Zootaxa 5686 (2), pp. 249-269 : 257-259

Erythrogonia dmitrievi sp. nov.

Length. Male holotype 6.5 mm; male paratype 6.3 mm; female paratype 6.4 mm.

( Figs. 10 , 31–38 )

Head ( Figs. 10 , 31 ). Median length of crown approximately 0.8 of interocular width and 0.5 of transocular width; ocelli located approximately on imaginary line between anterior angles of compound eyes, each ocellus equidistant from median line of crown and adjacent anterior eye angle; coronal suture distinct; coronal surface smooth, without shallow median concavity. Face with muscle impressions of frons distinct; epistomal suture obscure medially; clypeus continuing profile of frons on upper portion and more nearly horizontal on lower portion.

Thorax ( Fig. 10 ). Pronotum, in dorsal view, with width approximately equal to transocular width of head; lateral margins convergent anteriorly; posterior margin slightly concave medially; dorsolateral carina complete, almost rectilinear, slightly declivous anterad. Mesonotum with scutellum not transversally striate. Forewing with membrane well-delimited, including all apical cells except base of fourth; veins mostly distinct, not elevated. Other features of head and thorax as in the generic description ( Young 1977, p. 767).

Male terminalia. Pygofer ( Fig. 32 ), in lateral view, moderately produced posteriorly; posterior margin broadly rounded; without processes; macrosetae distributed mainly on posterior margin and extending anteriorly. Valve, in ventral view, subrectangular. Subgenital plate ( Figs. 33–35 ), in ventral view, elongate and robust, extending almost as far posteriorly as pygofer apex; basal half expanded; distal half narrowed; apex narrowly rounded; dorsal surface with distinct projection at median portion associated with style apex; plate fused to its counterpart at base; with uniseriate macrosetae. Connective ( Figs. 34, 35 ), in dorsal view, somewhat T-shaped; arms short and broad; stalk with median keel. Style ( Figs. 33, 34 ), in dorsal view, extending posteriorly beyond apex of connective; without preapical lobe; apex obtuse. Aedeagus ( Figs. 36, 37 ) symmetrical; shaft, in lateral view, tubular, with pair of slender straight processes at apical portion, directed dorsally; basal portion of aedeagus with pair of projections directed anteriorly. Paraphyses ( Figs. 34, 35 ) symmetrical; stalk, in dorsal view, elongate and robust; with pair of strong bifurcate rami.

Female terminalia. Sternite VII ( Fig. 38 ), in ventral view, with deep median emargination at posterior margin.

Color ( Figs. 10 , 31 ). Dorsum (crown, pronotum, mesonotum, and forewings) mostly brown to dark brown. Crown with pair of triangular white spots, separated from each other at median line. Eyes dark brown. Pronotum with subrectangular white spot with median posterior indentation. Forewing with pair of white spots on basal half of clavus, larger one transcommissural and smaller one near claval sulcus; apex of clavus with additional small white spot; corium with pair of white spots at preapical portion, smaller one at inner anteapical cell and larger one at costal margin, extending to central anteapical cell. Ground color of face pale yellow. Superior portion of lateral pronotal lobe brown, inferior portion pale yellow; lateral and ventral portions of meso- and metathorax mostly pale yellow; legs mostly pale yellow.

Etymology. The new species name, dmitrievi , is given in honor of Dr. Dmitry Dmitriev (Illinois Natural History Survey, Urbana-Champaign) in recognition of his contribution to the development of cybertaxonomy and leafhopper studies, as well as for his friendship.

Material examined. Brazil, state of Maranhão. Male holotype : “ Brasil (MA [Maranhão]), Bom Jardim \ REBIO [Reserva Biológica]- Res. Biol. Gurupi \ Armadilha Malaise \ 17–27.i.2010, F. Limeira- \ de-Oliveira, J.T. Câmara \ & A.A.T. Sousa, cols.” ( CZMA) . Paratypes: one male, same data as holotype ( DZRJ) ; one female, same data as holotype ( CZMA) .

Taxonomic notes. Erythrogonia dmitrievi sp. nov. is similar to E. anduzei Young, 1977 , E. dottaga Medler, 1963 , and E. laeta ( Fabricius, 1787) . These four species share a similar arrangement of the spots on the crown, pronotum, and forewings. However, the new species can be differentiated by the bifurcated rami of the paraphyses ( Figs. 34, 35 ) and aedeagus with a pair of slender processes at apical portion ( Figs. 36, 37 ). Although the female terminalia were properly prepared, their original condition was unfortunately quite compromised, not allowing the description of the ovipositor and other structures. Hence, it was only possible to describe the sternite VII ( Fig. 38 ).

Figures

FIGURES 7–11. Dorsal habitus of holotypes of five new Brazilian species of Erythrogonia (antennae and legs omitted). 7, E. peclyae sp. nov. (Roraima); 8, E. dalvae sp. nov. (Amazonas); 9, E. adolfoi sp. nov. (Acre); 10, E. dmitrievi sp. nov. (Maranhão); 11, E. dietrichi sp. nov. (Goiás). Scale bars = 1 mm.

FIGURES 31–38. Erythrogonia dmitrievi sp. nov. Male. 31, face, anterior view; 32, pygofer, lateral view; 33, subgenital plates, styles, and connective, ventral view; 34, subgenital plates, styles, connective, and paraphyses, ventral view; 35, subgenital plate, styles, connective, and paraphyses, lateral view; 36, anal tube and aedeagus, lateral view; 37, aedeagus, ventral view. Female. 38, sternite VII, ventral view. Scale bars: 32–37 = 0.5 mm; 38 = 1 mm.