Taxonomic revision and phylogeny of the sharpshooter genus Dasmeusa Melichar, 1926, with a scanning electron microscopy study of D. pauperata (Fabricius, 1803) (Hemiptera: Cicadellidae: Cicadellini)

The genus Dasmeusa is distributed in Northern and Northeastern Brazil and the Guianas. Until the present study, six species were recognized within Dasmeusa. The species of this genus are very similar in terms of color and external morphology, being distinguished mainly by the male terminalia. Here, we review and redescribe Dasmeusa and its species, describe four new species, and present the first phylogenetic analysis of the genus, including 40 morphological characters and 15 terminal taxa. Dasmeusa flavescens Metcalf and Erythrogonia bicolor Metcalf are considered junior synonyms of the type-species, Dasmeusa pauperata (Fabricius). Scanning electron microscopy was employed for a detailed study of the integument of the type-species, including sensilla, surface sculpturing, brochosomes, organ of Evans, and other structures. The phylogenetic analysis with equal weights resulted in nine most parsimonious trees. The implied weighting method resulted in two trees, both with the same ingroup topology as observed in one of the nine equal-weights trees. This preferred topology is as follows: ((D. basseti (D. mendica (D. rafaeli sp. nov., D. falcifera sp. nov.))) (D. isabellina (D. oriximina sp. nov. (D. pauperata (D. imperialis, D. dinizi sp. nov.))))). Dasmeusa was recovered as monophyletic in all trees, being supported by five apomorphic characters

Diversity of Hemiptera Auchenorrhyncha in citrus, coffee and a fragment of native forest of the State of São Paulo

A população de Hemiptera Auchenorrhyncha foi estudada em pomares de laranja doce (Citrus sinensis), cafezais (Coffea arabica) e floresta estacional semidecidual com fisionomia arbustiva, em Bebedouro (SP), com o objetivo de avaliar a influencia do ecossistema natural na composição de espécies do agroecossistemas. O monitoramento foi feito com cartões adesivos amarelos, os quais foram trocados a cada 15 dias, efetuando-se a contagem e identificação dos Auchenorrhyncha coletados. Capturou-se o total de sete famílias, 11 subfamílias e 98 espécies, sendo Cicadellidae o grupo mais abundante. A floresta nativa apresentou a maior riqueza, diversidade e equitabilidade de espécies de Auchenorrhyncha, demonstrando ser mais estável que os demais habitats. Os altos valores de similaridades obtidos entre os agroecossistemas e a floresta demonstram que grande parte das espécies de cigarrinhas que está ocorrendo nos habitats agrícolas também está ocorrendo na floresta, indicando que esta pode estar funcionando como reservatório de espécies. A abundância de grupos taxonômicos de Auchenorrhyncha coletados variou nos habitats avaliados, sendo Proconiini o mais abundante no cafezal próximo à floresta, Athysanini, Scaphytopiini, Neocoelidiinae e Coelidiinae no pomar de laranja e cafezal distante da floresta; Cicadellinae e Agalliinae não se relacionaram a nenhum dos habitats. A presença de insetos vetores e possíveis vetores de doenças de plantas cultivadas nos habitats avaliados indicam a necessidade da implantação do manejo de pragas nessa área.The population of Hemiptera Auchenorrhyncha was studied in sweet citrus groves (Citrus sinensis), coffee plantations (Coffea arabica) and a semi-deciduous seasonal forest with shrub physiognomy in Bebedouro, SP, to evaluate the influence of the natural ecosystem on the species composition of the agroecosystems. Monitoring was carried out by using yellow stick cards, which were replaced every 15 days and all Auchenorrhyncha collected were counted and identified. Seven families, 11 subfamilies and 98 species were collected, with Cicadellidae being the most abundant. The native forest presented larger wealth, diversity and equitability of Auchenorrhyncha species, demonstrating to be more stable than the other habitats. The high values of similarities obtained between the agroecosystems and the forest demonstrated that great part of Auchenorrhyncha species occurring in the agricultural habitats was also occurring at the forest, indicating that the last may serve as reservoir of species. The abundance of the taxonomic groups of Auchenorrhyncha collected varied with the evaluated habitats, with Proconiini being the most abundant in the coffee plantation next to the forest, Athysanini, Scaphytopiini, Neocoelidiinae and Coelidiinae in the orange orchard and coffee plantation distant from the forest; Cicadellinae and Agalliinae were not related to any of the habitats. The presence of vector insects and possible vectors of plant diseases in the appraised habitats indicate the need of the implementation of strategies for landscape management.Fundo de Defesa da Citricultura (FUNDECITRUS

Catálogo Taxonômico da Fauna do Brasil: setting the baseline knowledge on the animal diversity in Brazil

The limited temporal completeness and taxonomic accuracy of species lists, made available in a traditional manner in scientific publications, has always represented a problem. These lists are invariably limited to a few taxonomic groups and do not represent up-to-date knowledge of all species and classifications. In this context, the Brazilian megadiverse fauna is no exception, and the Catálogo Taxonômico da Fauna do Brasil (CTFB) (http://fauna.jbrj.gov.br/), made public in 2015, represents a database on biodiversity anchored on a list of valid and expertly recognized scientific names of animals in Brazil. The CTFB is updated in near real time by a team of more than 800 specialists. By January 1, 2024, the CTFB compiled 133,691 nominal species, with 125,138 that were considered valid. Most of the valid species were arthropods (82.3%, with more than 102,000 species) and chordates (7.69%, with over 11,000 species). These taxa were followed by a cluster composed of Mollusca (3,567 species), Platyhelminthes (2,292 species), Annelida (1,833 species), and Nematoda (1,447 species). All remaining groups had less than 1,000 species reported in Brazil, with Cnidaria (831 species), Porifera (628 species), Rotifera (606 species), and Bryozoa (520 species) representing those with more than 500 species. Analysis of the CTFB database can facilitate and direct efforts towards the discovery of new species in Brazil, but it is also fundamental in providing the best available list of valid nominal species to users, including those in science, health, conservation efforts, and any initiative involving animals. The importance of the CTFB is evidenced by the elevated number of citations in the scientific literature in diverse areas of biology, law, anthropology, education, forensic science, and veterinary science, among others

Iragua ferruginea Cavichioli 1991

<i>Iragua ferruginea</i> Cavichioli, 1991 <p>(Figures 8–22)</p> <p> <b>Female.</b> Total length 10.9–11.4 mm (n = 2).</p> <p>External morphology and color pattern (Fig. 8) as in the specific description of Cavichioli (1991: 81).</p> <p>Terminalia with abdominal sternite VII (Figs. 9–10), in lateral view, strongly produced ventrally, keeled medially; in ventral view, lateral margins convergent posteriorly, posterior margin with small but distinct median emargination. “Internal” sternite VIII (Fig. 11), in dorsal view, with two large, central sclerotized semicircular areas, one located above the other. Pygofer (Fig. 12), in lateral view, well produced posteriorly, subtriangular, apex subacute; with large macrosetae distributed mostly on posterior two-thirds of disk. Valvifer I (Fig. 12), in lateral view, lozenge-shaped. Valvulae I (Fig. 13), in ventral view, distinctly expanded basally; blade, in lateral view, approximately rectilinear beyond basal curvature but with apical portion slightly curved ventrally; apex acute; dorsal sculptured area extending from basal portion to apex, formed by scale-like processes arranged in oblique lines (Fig. 15), except basally with more linear processes (Fig. 14); ventral sculptured area restricted to apical portion, formed by aligned or nearly aligned scale-like processes; ventral interlocking device located on basiventral half of blade. Valvulae II (Fig. 16), in lateral view, moderately expanded beyond basal curvature; dorsal margin convex; apex (Fig. 20) broadly rounded; ventral preapical prominence (Fig. 21) distinct; dorsal margin with about 35 subtriangular teeth (Figs. 18–19), usually clearly separated from each other; teeth at basal ascending portion (Fig. 17) more rounded and of irregular form; irregular denticles (serration) distributed on teeth; dorsal apical portion of blade without denticles, much shorter than ventral apical portion, the latter with irregular denticles. Gonoplacs (Fig. 22) of the usual form in sharpshooters (in lateral view, with distal half expanded and with obtuse apex).</p> <p> <b>Material examined.</b> Three females: Brazil, state of Rondônia, Ouro Preto do Oeste, 8/X/1986, J. Becker col. (MNRJ).</p> <p> <b>Taxonomic notes.</b> Our female specimens are from the type-locality of <i>I. ferruginea</i> in the Amazonian state of Rondônia (northern Brazil) and their external form and color pattern (Fig. 8) are as in the original specific description of Cavichioli (1991). We found in the female terminalia of <i>I. ferruginea</i> a conspicuous and peculiar “internal” sternite VIII, which is formed by two large, central sclerotized semicircular areas, one located above the other (Fig. 11). In his detailed description of the genus, Young (1977) did not mention this structure (sclerites of the genital chamber in his terminology). In the valvulae II of the ovipositor, we call attention to the dorsal apical portion (<i>i.e.</i>, the distal area between the last tooth and the blade apex), which has no denticles and is much shorter than the ventral dentate apical portion; the apex of the blade is broadly rounded (Figs. 16, 20–21). These features of the valvulae II occur also in <i>Ladoffa</i>, a genus considered closely related to <i>Iragua</i> (see Young 1977: 357, fig. 286m of <i>L. sannionis</i> Young, 1977).</p>Published as part of <i>Cavichioli, Rodney R. & Mejdalani, Gabriel, 2017, The sharpshooter genus Iragua Melichar: a new Colombian species, the female of I. ferruginea Cavichioli, and a key to males of the genus (Insecta: Hemiptera: Cicadellidae: Cicadellini), pp. 120-126 in Zootaxa 4281 (1)</i> on pages 122-125, DOI: 10.11646/zootaxa.4281.1.12, <a href="http://zenodo.org/record/815989">http://zenodo.org/record/815989</a&gt

Iragua albinoi Cavichioli & Mejdalani 2017, sp. nov.

<i>Iragua albinoi</i> sp. nov. <p>(Figures 1–7)</p> <p> <b>Male holotype.</b> Total length 9.2 mm.</p> <p>Head (Fig. 1) with median length of crown about 6/10 of interocular width and 4/10 of transocular width; surface of crown with slight longitudinal fovea; antennal ledges, in lateral view, with anterior margin oblique and convex; frons slightly flattened medially. Pronotum (Fig. 1) with posterior margin almost rectilinear; disk without transverse rugae; scutellum not transversely striate. Forewings (Fig. 1) without distinct membrane; surface opaque; second apical cell slightly narrowed apically. Remaining morphological characters of head and thorax as in the generic description of Young (1977: 399).</p> <p>Color (Fig. 1). Ground color of dorsum brown. Posterior portion of crown and anterior portion of pronotum suffused with dark brown; pronotum with pair of large red triangular areas; scutellum red. Forewings with most of clavus red; transverse transcommissural brown stripe at midlength of clavus; small brown area adjacent to claval sulcus, located slightly posterior to transcommissural stripe; base and apex of clavus dark brown; corium brown with two large oblique red areas, the first on basal half parallel to brachial cell, the second extending anteriorly from apical portions of brachial cell and inner discal cell, where it is broader, to near costal margin; distal third of corium with white stripe extending from outer margin of first apical cell to costal margin, followed by narrower parallel red stripe; white arc close to apex of anteapical cells, extending from outer margin of first apical cell to costal margin. Face, lateral and ventral portions of thorax, and legs mostly brownish-yellow; labium brown.</p> <p>Male terminalia with pygofer (Fig. 2), in lateral view, moderately produced posteriorly; dorsoapical margin narrowly rounded; with long macrosetae on posterior half of disk; without processes. Valve (Fig. 3), in ventral view, subrectangular. Subgenital plates (Figs. 2–3), in ventral view, subtriangular, distinctly narrowed on median third; with long uniseriate macrosetae and with many microsetae; in lateral view, plates not extending as far posteriorly as apex of pygofer. Connective (Fig. 4), in dorsal view, T-shaped; arms robust; stalk slender, with distinct median keel. Style (Fig. 4), in dorsal view, extending as far posteriorly as connective; without preapical lobe; apical portion of apophysis curved outwards; apex obtuse. Aedeagus (Figs. 5–6), in lateral view, with shaft strongly curved ventrally; apex narrowed; gonopore located at apex; atrium well-developed, projected ventrally, with pair of strong unciform processes; in caudal view, with short basidorsal apodemes. Paraphyses (Fig. 7) articulated to apex of connective; in dorsal view, with cup-shaped stalk about as long as rami, the latter slender and subparallel (just slightly divergent apically).</p> <p>Female unknown.</p> <p> <b>Material examined.</b> Male holotype: “ COLOMBIA: Huila, \ San Agustin, 1,500 m. \ 8.xi.1971 ”; “ M. Cooper \ B.M. 1972-275” (DZUP).</p> <p> <b>Etymology.</b> We are pleased to name this beautiful new species for Prof. Dr. Albino Morimasa Sakakibara (Departamento de Zoologia, Setor de Ciências Biológicas, Universidade Federal do Paraná). Dr. Sakakibara’s works on the treehoppers, which include outstanding descriptions, habitus drawings and photographs, have always been an inspiration to us.</p> <p> <b>Taxonomic notes.</b> <i>Iragua albinoi</i> <b>sp. nov.</b> can be distinguished from the remaining species of the genus by the color pattern of the forewings, <i>i.e.</i>, most of clavus red and corium brown with two large oblique red areas and a transverse white stripe followed by a narrower red stripe (Fig. 1). The new species does not have two dark spots at the apex of each forewing, a feature that perhaps defines a group of species within <i>Iragua</i> (including <i>I. chola</i>, <i>I</i>. <i>diversa</i>, <i>I. ferruginea</i> (Fig. 8), <i>I. infuscata</i>, <i>I. montana</i>, <i>I. nubila</i> and <i>I. vallis</i>). In the male terminalia, the pair of unciform processes of the aedeagal atrium is a diagnostic feature of <i>I. albinoi</i> (Figs. 5–6). We provide below a key to males of the 14 known species of the genus. Readers are referred to Wilson <i>et al.</i> (2009), who provided digital images of the body in dorsal view of 11 <i>Iragua</i> species; these images are useful for recognizing and comparing the species and can be used in conjunction with our key.</p>Published as part of <i>Cavichioli, Rodney R. & Mejdalani, Gabriel, 2017, The sharpshooter genus Iragua Melichar: a new Colombian species, the female of I. ferruginea Cavichioli, and a key to males of the genus (Insecta: Hemiptera: Cicadellidae: Cicadellini), pp. 120-126 in Zootaxa 4281 (1)</i> on page 121, DOI: 10.11646/zootaxa.4281.1.12, <a href="http://zenodo.org/record/815989">http://zenodo.org/record/815989</a&gt

Iragua Melichar 1926

Key to males of <i>Iragua</i> (adapted from Young 1977) <p> 1 Aedeagus with pair of unciform atrial processes (Figs. 5–6)............................. <i>I. albinoi</i> <b>sp. nov.</b> Colombia.</p> <p>- Aedeagus without such processes....................................................................... 2</p> <p>2 Pygofer without processes.............................................................................. 3</p> <p>- Pygofer with apical processes.......................................................................... 13</p> <p>3 Paraphyses with unpaired basal portion short and broad (Young 1977: 400, fig. 323h).............................. 4</p> <p>- Paraphyses with unpaired basal portion relatively long and slender (Young 1977: 402, fig. 325h)..................... 5</p> <p> 4 Aedeagus more slender and elongate, curved gradually dorsad through most of its length (Young 1977: 400, fig. 323f)............................................................................... <i>I. estella</i> (Distant, 1908). Ecuador.</p> <p> - Aedeagus shorter, curved gradually ventrad through most of its length (Young 1977: 400, fig. 324f)...................................................................................... <i>I. flammea</i> (Signoret, 1855). French Guiana.</p> <p>5 Paraphyses with a pair of rami.......................................................................... 6</p> <p> - Paraphyses with two pairs of rami (Cavichioli 1991: 80, figs. 3–4).................. <i>I. infuscata</i> Cavichioli, 1991. Brazil.</p> <p>6 Forewings without apical black spots..................................................................... 7</p> <p>- Forewings each with two apical black spots (Fig. 8)......................................................... 8</p> <p> 7 Aedeagal apex regularly rounded, without processes (Young 1977: 402, fig. 325f and p)................................................................................. <i>I. fractilinea</i> (Fowler, 1899). Costa Rica, Panama, Colombia.</p> <p> - Aedeagal apex with a slender dorsoapical process (Young 1977: 402, fig. 326f)........ <i>I. notanda</i> (Fowler, 1899). Panama.</p> <p> 8 Aedeagus slender and biundulate in lateral view (Young 1977: 404, fig. 327f and p)................................................................................................ <i>I. nubila</i> Young, 1977. Peru, Colombia, Brazil.</p> <p>- Aedeagus broader, or if slender then not biundulate.......................................................... 9</p> <p> 9 Paraphyses with ventral margins erose (<i>i.e.</i>, irregular), at least apically (Young 1977: 406–407, figs. 329h and 330s–v)... 12</p> <p> - Paraphyses with ventral margins not erose (<i>i.e.</i>, regular)...................................................... 10</p> <p>10 Paraphyses, in dorsal view, with rami divergent apically..................................................... 11</p> <p> - Paraphyses, in dorsal view, with rami parallel apically (Cavichioli 1991: 83, fig. 11)... <i>I. ferruginea</i> Cavichioli, 1991. Brazil.</p> <p> 11 Aedeagus with two short processes apically, a dorsal and a ventral one (Young 1977: 405, fig. 328f)......................................................................................... <i>I. montana</i> Young, 1977. Peru, Bolivia.</p> <p> - Aedeagus with a short ventroapical process (Lozada 1998: 6, fig. 6)....................... <i>I. chola</i> Lozada, 1998. Peru.</p> <p> 12 Paraphyses very broad anteapically and with an anteapical angular projection on ventral margin of each ramus; aedeagus very short and broad (Young 1977: 406, fig. 329f, h)................................... <i>I. vallis</i> Young, 1977. “Amazon.”</p> <p> - Paraphyses longer and more slender, not expanded anteapically and without angular projection; aedeagus longer (Young 1977: 407, fig. 330f, q–v).................................... <i>I</i>. <i>diversa</i> (Signoret, 1855). French Guiana, Colombia, Peru.</p> <p> 13 Aedeagus with dorsal anteapical processes and bifid at apex (Young 1977: 409, fig. 331f, h).. <i>I. perplexa</i> Young, 1977. Peru.</p> <p> - Aedeagus without processes (Young 1977: 409, fig. 332f)......... <i>I. circulifera</i> (Taschenberg, 1884). Trinidad, Venezuela.</p>Published as part of <i>Cavichioli, Rodney R. & Mejdalani, Gabriel, 2017, The sharpshooter genus Iragua Melichar: a new Colombian species, the female of I. ferruginea Cavichioli, and a key to males of the genus (Insecta: Hemiptera: Cicadellidae: Cicadellini), pp. 120-126 in Zootaxa 4281 (1)</i> on page 125, DOI: 10.11646/zootaxa.4281.1.12, <a href="http://zenodo.org/record/815989">http://zenodo.org/record/815989</a&gt

Guaricicana Domahovski & Cavichioli 2019, gen. nov.

Genus Guaricicana gen. nov. urn:lsid:zoobank.org:act: 6788EF71-4E7F-4915-ADA3-A2A5 AF335714 Figs 1–29 Type species Guaricicana borgesi gen. et sp. nov. Diagnosis Head (Figs 1–3) wider than pronotum; head surface with transverse parallel striae on crown, anterior margin and frons; crown-face transition rounded. Forewing (Fig. 4) with vein separating appendix and first apical cell complete; appendix and first apical cell having the same texture as rest of forewing. First hind tarsomere (Fig. 9) with inner row formed by cucullate setae. Pygofer (Fig. 12) with basal process on ventral margin. Subgenital plate (Figs 12, 15) long, reaching pygofer apical third, but fully covered by sternite VIII. Connective (Fig. 16) present, T-shaped. In dorsal view, style (Fig. 17) elongated, without lateral lobes. Aedeagus (Figs 19–20) shaft very long. Female first valvula (Figs 23–24) with dorsal sculpturing imbricate; ventral margin near apex and apex with sculpturing areolate. Second valvula (Figs 25–26) lacking prominent widely spaced teeth; apical fifth with irregular rounded teeth on dorsal margin and some small teeth on ventral margin near apex. Etymology The generic name Guaricicana (feminine noum), refers to the Reserva Particular do Patrimônio Natural da Guaricica, of the Sociedade em Pesquisa da Vida Selvagem e Educação Ambiental (SPVS), municipality of Antonina, state of Paraná, where the majority of the type-material was collected. The suffix -ana is common for other generic names of Iassinae. Description MEASUREMENTS. Body length: male 5.8–6.1 mm; female 6.4–6.6 mm. BODY. Small to medium-sized leafhoppers, slightly depressed dorsoventraly and moderately elongated. HEAD (Figs 1–3). Dorsal view: wider than pronotum; not produced anteriorly, median length of crown onetenth interocular width; anterior and posterior margins parallel, broadly rounded; surface with transverse parallel striae; ocelli not visible dorsally; ventral view: face ca twice as wide as high; ocelli small, on anterior margin, mesad antennal pits; antennal ledge closer to anterodorsal than to anteroventral corner of eye, carinate and slightly oblique, not concealing antennal base; frons strongly broader dorsally, with transverse striae, distance between lateral margin of frons and eye internal margin subequal to maximum clypeus width; frontogenal suture not surpassing antennal ledges; gena broader than high, ventral margin excavate below eye internal margin and not completely concealing proepisternum; epistomal suture distinct and complete; clypeus as long as wide, lateral margins approximately straight and convergent apically, apical margin rounded; lateral view: crown slightly concave; crown-face transition rounded, with transverse striae; frons slightly convex; clypeus slightly inflated. PRONOTUM (Fig. 1). Surface transversely striated except near anterior margin, anterior margin broadly rounded and produced anterad of eyes medially, lateral margins carinate and shorter than eye length, almost parallel; posterior margin slightly excavated; laterally (Fig. 3) slightly declivous; head and pronotum in continuous slope. MESONOTUM (FIG. 1). Slightly wider than long; mesonotum rugulose; scutellum with inconspicuous transverse striae. FOREWING (Fig. 4). Venation distinct; small setae present laterally to the veins; three closed anteapical and five apical cells present; vein separating appendix and first apical cell complete; appendix and first apical cell having the same texture as rest of forewing; appendix developed, bordering first and second apical cells. Hind wing (Fig. 5) with R4+5 and M1+2 veins fused apically. LEGS. Profemur (Fig. 6) three times longer than high; AD, AM and PD rows reduced with exception of apical setae AD1, AM1 and PD1, respectively; intercalary group formed by short and irregular double row of setae continuous with AV row; AV row formed by six thicker and longer setae; PV row composed by thin, long setae; protibia (Fig. 6) circular-shaped in cross section; AV row formed by very short setae in basal half, apical half with five longer and thicker setae toward apex; AD row undifferentiated; PD row formed by three longer and thicker setae and short, thin intercalary setae; PV row formed by approximately ten short setae; metafemur (Fig. 7) with setal formula 2:2:1; metatibia (Fig. 8) rows PD, AD, and AV with 15–16, 10–11, and 12–13 macrosetae, respectively; PV row beginning on median third, setae of median third homogeneous in length, setae of apical third alternating short and long setae and ending in two short setae; first tarsomere (Fig. 9) with inner row formed by five-six thick cucullate setae, pecten with four platellae flanked by tapered lateral setae; second tarsomere (Fig. 9) shorter than half of first tarsomere length, pecten with two apical platellae, flanked by tapered lateral setae. MALE TERMINALIA. Sternite VIII (Fig. 10) triangular, strongly produced posterad and fully hiding subgenital plates. Pygofer (Fig. 12) with basal process on ventral margin. Subgenital plate (Figs 12, 15) long, reaching pygofer apical third. Connective (Fig. 16) present, T-shaped. In dorsal view, style (Fig. 17) elongated, without lateral lobes. Aedeagus (Figs 19–20) shaft long. FEMALE TERMINALIA. Pygofer (Fig. 22) with numerous macrosetae except on anterodorsal portion. Valvulae (Figs 23, 25) slender, not surpassing pygofer apex, curved dorsally. First valvula (Figs 23–24) with dorsal sculpturing imbricate, starting at midlength to near apex; apical portion (Fig. 24) with ventral margin near apex and apex with sculpturing areolate, apex gradually tapered. Second valvula (Figs 25–26) apical fifth with irregular rounded teeth on dorsal margin and some small teeth on ventral margin near apex. Gonoplac (Fig. 27) higher at midlength; dorsal margin straight; ventral margin slightly rounded with few and sparse setae except on apical portion; apex rounded. Distribution Brazil (Paraná and Rio de Janeiro). Remarks The new genus is placed within Hyalojassini in having the head with the transition crown to face rounded in profile; the ocelli on anterior margin not visible in dorsal view; the hind wing with R4+5 and M1+2 veins fused apically; and the sternite VIII of male fully hiding the subgenital plates. Guaricicana gen. nov. is very similar to Daveyoungana Blocker & Webb, 1992 in the body shape, slightly depressed dorsoventrally and moderately elongated; the position of the black spots of the head and the pronotum; the head wider than pronotum; the fore wing with a vein separating the appendix and the first apical cell complete, and the appendix and the first apical cell with the same texture as the remainder of the fore wing; the chaetotaxy of the legs, except for the first hind tarsomere; the pygofer with a well sclerotized basal portion, forming a ring dorsally, the presence of a basal process on the ventral margin and the lateral lobes with many macrosetae, articulated with the base by flexible membranous clefts; the large T-shaped connective; the style with an elongated apophysis; the aedeagus shaft elongated; and the female first valvula with an imbricate dorsal sculpturing and a ventral margin and apex with sculpturing areolate. However, Daveyoungana can easily be separated from Guaricicana gen nov. by the coloration of the forewing with a yellow costal margin; the first hind tarsomere with a row of simple (non-cucullate) setae on the ventral surface; a short subgenital plate, approximately as long as wide; the connective with a longer stalk; the style with lateral lobes; and the female second valvula with three prominent widely spaced teeth in the distal half.Published as part of Domahovski, Alexandre C. & Cavichioli, Rodney R., 2019, Guaricicana, a new genus of Hyalojassini (Hemiptera: Cicadellidae: Iassinae) from the Brazilian Atlantic Forest, pp. 1-12 in European Journal of Taxonomy 547 on pages 3-8, DOI: 10.5852/ejt.2019.547, http://zenodo.org/record/338541