Takiyaella Gonçalves & Domahovski 2021, gen. nov.

Genus Takiyaella gen. nov.

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Figs 1–13

Takiyaella daniela gen. et sp. nov.

Medium-sized leafhoppers (Fig. 12). Head (Figs 1A, 7A, 8A) slightly produced anteriorly, with crown-face transition rounded, without carina; lateral margins of crown, adjacent to eyes, elevated and not carinated. Antennal ledge (Fig. 1B) narrow, slightly prominent and weakly carinated. Forewing (Figs 1D, 7D) with two or three dark maculae on claval commissure; crossvein ʻsʼ missing. Male pygofer (Figs 3E, 8E) approximately rectangular, ventral margin with sclerotized subapical serrated tooth; caudal margin usually with ventral rounded lobe. Subgenital plates (Figs 1G, 8G) fused to each other along the basal two-thirds; ventral surface with few apical macrosetae. Connective (Figs 1H, 3H) Y- or V-shaped. Aedeagus (Figs 1J, 7J, 8J) with one or two pairs of atrial processes, gonopore apical. Second valvula of ovipositor (Figs 4G, 9G) fused to each other just near base, dorsal margin with several irregular small teeth.

The generic name Takiyaella (feminine noun) is a tribute to Prof. Dr Daniela Maeda Takiya in recognition of her remarkable contribution to our knowledge of the Brazilian Auchenorrhyncha.

HEAD AND THORAX. Head, in dorsal view (Figs 1A, 7A), slightly produced anteriorly, median length of crown approximately equal or slightly less than interocular width; transocular width about 4 /5 humeral width of pronotum; crown subrectangular, anterior margin rounded, surface flat, texture shagreen; ocellus medium-sized, on anterior margin of head, distant from eye margin, visible in dorsal view; coronal maculae distinct at basal half, between midline and eyes; coronal suture distinct in basal third, evanescent anteriorly. Head, in frontal view (Figs 1B, 10B), with face slightly higher than wide; frontogenal suture extending to antennal ledge but not reaching ocellus; antennal ledge narrow, slightly prominent, oblique and weakly carinated; frons approximately 1.8 × as long as wide; muscle impressions indistinct; epistomal suture distinct but incomplete, evanescent medially; clypeus 1.5 × as long as maximum width, lateral margins parallel, apex slightly emarginated; maxillary plate produced ventrally, reaching clypeus apex; lorum ellipse-shaped, apical margin not reaching apex of clypeus; gena incompletely covering episternum. Head, in lateral view (Figs 1C, 3C), with crown-face transition rounded, without carina; lateral margins of crown, adjacent to eyes, elevated and not carinated; antennal pits at same level as an imaginary line tangent to anteroventral angles of eyes; antenna with long flagellum, exceeding half-length of forewing; frons convex. Pronotum (Figs 1A, 5A) with inconspicuous transverse striae on disc; lateral margins rounded, convergent anterad, and slightly shorter than eye length; posterior margin roundly excavated; in lateral view (Figs 1C, 8C), slightly declivous; dorsopleural carina present and complete. Mesonotum (Fig. 8A) as long as wide. Forewing (Figs 1D, 7D) mostly semi-hyaline, except for apical cells and apex of anteapical cells hyaline, 3.5 × as long as maximum width; venation indistinct, except apically; two anteapical cells, crossvein sectorial ʻsʼ missing; four apical cells: first to third approximately rectangular, third enlarged apically, fourth rhomboid, base of second more proximal than base of third; appendix narrow; apex rounded. Hind wing with vein R 4+5 and M 1+2 preapically convergent, fused to each other 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 and PV rows 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 20 setae, slightly longer and thicker towards apex; AD and PD rows without differentiated setae; PV row with 2–3 widely spaced setae. Metafemur with setal formula 2:2:1, with inner setae of second pair reduced in size. Metatibial AD row with 2– 4 intercalary setae between macrosetae; PD, AD, and PV rows with 13– 15, 10–12, and 28–32 macrosetae, respectively; AV row with approximately 11 macrosetae distributed along most of tibia, except in the proximal and distal portions. 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 1E, 3E, 5E) approximately rectangular, usually apically expanded with an apical ventral lobe; macrosetae absent; ventral margin little sclerotized medially, with a sclerotized and serrated tooth on apical portion. Valve (Figs 1G, 8G) without indication of separation with subgenital plates. Subgenital plate (Figs 3G, 5G) not exceeding pygofer apex; plates fused to each other along the basal two-thirds; ventral surface with few apical macrosetae; in lateral view (Figs 1F, 7F), deeply concave. Connective (Figs 1H, 7H) Y- or V-shaped, articulated to aedeagus base, not bifurcated at the point of articulation. Style (Figs 1I, 8I) with apodeme expanded; ventral margin with median lobe; preapical setae present; preapical lobe moderately developed, slightly produced posterad; apex curved ventrally, hook-shaped. Aedeagus (Figs 1J–K, 5J–K) with preatrium long and robust; atrium with one or two pairs of processes; shaft curved dorsoanteriorly, usually expanded at apex; gonopore apical. Anal tube (Figs 3M, 5L, 8E) cylindrical, usually with small basiventral process with denticles.

FEMALE TERMINALIA. Sternite VII (Figs 2C, 4C, 6C, 9C, 11A) subquadrangular; posterior margin widely rounded. ʻInternalʼ sternite VIII membranous. Pygofer (Figs 2D, 4D, 6D, 9D, 11B) elongate, 1.7 × as long as maximum height; macrosetae distributed near apex and ventral margin. First valvifer (Figs 2E, 4E, 6E, 9E, 11C) higher than long, dorsal margin straight, posterior margin slightly oblique. First valvula of ovipositor (Figs 2E, 4E, 6E, 9E, 11C) elongated, moderately curved dorsally; dorsal sculptured area submarginal, present throughout apical half; apex (Figs 2F, 4F, 6F, 9F, 11D) acute. Second valvifer (Figs 2I, 4I, 6I, 9I, 11G) higher than long. Second valvula of ovipositor (Figs 2G, 4G, 6G, 9G, 11E) elongated, moderately curved dorsally in the apical half, fused to each other just near base; apical portion (Figs 2H, 4H, 6H, 9H, 11F) slightly expanded, dorsal margin with several irregular small teeth. Gonoplac (Figs 2I, 4I, 6I, 9I, 11G) expanded on apical half; external surface along ventral margin and apex with dentiform cuticular projections and few short and robust setae; apex (Figs 2J, 4J, 6J, 9J, 11H) rounded or acutely rounded.

Brazil (states of Minas Gerais, Paraná and Rio de Janeiro). Species of Takiyaella gen. nov. occur in southern and southeastern Brazil, in the Atlantic Rainforest biome (Fig. 13).

Takiyaella gen. nov. shares some similarities with Paraphysiana Chiamolera, Cavichioli & Anderle, 2003 as follows: (1) crown with anterior margin rounded; (2) crown-face transition without carina; (3) frontogenal suture not reaching ocellus; (4) antennal ledge narrow and slightly prominent; (5) pronotum with posterior margin roundly excavated; and (6) forewing with dark maculae along the anal margin.

However, the new genus can be easily separated from Paraphysiana due to hind wing with veins R 4+5 and M 1+2 preapically convergent, fused at apex, forming single vein, whereas in Paraphysiana R 4+5 and M 1+2 are convergent, fused to each other, but they are divergent apically; pygofer without inner ventral processes (present in Paraphysiana); subgenital plates without dorsal tooth (present in Paraphysiana); style with preapical lobe moderately developed, whereas in Paraphysiana it is strongly developed and produced caudally; paraphysis absent (present in Paraphysiana); and the aedeagus with atrial processes (absent in Paraphysiana).