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

Fig. 8 in Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov.

Fig. 8. Costanana piraquarensis sp. nov., holotype, ♂ (DZUP 215485). A. Head and thorax, dorsal view. B. Head, ventral view. C. Head and thorax, lateral view. D. Forewing. E–M. Male terminalia. E. Sternite VIII, ventral view. F. Valve, anterior view. G. Pygofer, valve and subgenital plate, lateral view. H. Subgenital plate, ventral view. I. Connective, dorsal view. J. Style, dorsal view. K. Style, lateral view. L. Aedeagus, lateral view. M. Aedeagus, posterior view. Scale bars in mm.Published as part of <i>Domahovski, Alexandre C. & Cavichioli, Rodney R., 2023, Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov., pp. 1-53 in European Journal of Taxonomy 889 (1)</i> on page 21, DOI: 10.5852/ejt.2023.889.2245, <a href="http://zenodo.org/record/8269451">http://zenodo.org/record/8269451</a&gt

Fig. 3 in Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov.

Fig. 3. Costanana bifida sp. nov., paratype, ♀ (DZUP 215495). A. Apical portion of abdomen, ventral view. B. Apical portion of abdomen, lateral view. C. Sternite VII, ventral view. D. First valvifer and first valvula, lateral view. E. Apical portion of first valvula. F. Second valvulae, lateral view. G. Apical portion of second valvulae. H. Second valvifer and gonoplac, lateral view. I. Apical portion of gonoplac. Scale bars in mm.Published as part of <i>Domahovski, Alexandre C. & Cavichioli, Rodney R., 2023, Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov., pp. 1-53 in European Journal of Taxonomy 889 (1)</i> on page 10, DOI: 10.5852/ejt.2023.889.2245, <a href="http://zenodo.org/record/8269451">http://zenodo.org/record/8269451</a&gt

Guaricicana, a new genus of Hyalojassini (Hemiptera: Cicadellidae: Iassinae) from the Brazilian Atlantic Forest

A new monotypic genus of Iassinae Walker, 1870 tribe Hyalojassini Evans, 1972 is proposed based on Guaricicana borgesi gen. et sp. nov. from the states of Paraná and Rio de Janeiro, southern and southeastern Brazil, respectively. Detailed descriptions and illustrations of males and females are provided, as well as comparisons with the presumably more closely related genus, Daveyoungana Blocker & Webb, 1992

Fig. 13 in Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov.

Fig. 13. Habitus of species of Costanana DeLong & Freytag, 1972. Left, dorsal view; right, lateral view. A–B. C. flavina DeLong & Freytag, 1972 (DZUP). C–D. C. praecellens (Stål, 1862) (DZUP). E–F. C. santana DeLong & Wolda, 1983 (DZUP). Scale bars in mm.Published as part of <i>Domahovski, Alexandre C. & Cavichioli, Rodney R., 2023, Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov., pp. 1-53 in European Journal of Taxonomy 889 (1)</i> on page 30, DOI: 10.5852/ejt.2023.889.2245, <a href="http://zenodo.org/record/8269451">http://zenodo.org/record/8269451</a&gt

Fig. 26 in Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov.

Fig. 26. Metacostana cornuta gen. et sp. nov., holotype, ♂ (DZUP 215498). A. Head and thorax, dorsal view. B. Head, ventral view. C. Head and thorax, lateral view. D. Forewing. E–M. Male terminalia. E. Sternite VIII, ventral view. F. Valve, anterior view. G. Pygofer, valve and subgenital plate, lateral view. H. Subgenital plate, ventral view. I. Connective, dorsal view. J. Style, dorsal view. K. Style, lateral view. L. Aedeagus, posterior view. M. Aedeagus, lateral view. Scale bars in mm.Published as part of <i>Domahovski, Alexandre C. & Cavichioli, Rodney R., 2023, Eight new species of Costanana DeLong & Freytag (Hemiptera: Cicadellidae: Gyponini): taxonomic changes, key to males, and description of Metacostana gen. nov., pp. 1-53 in European Journal of Taxonomy 889 (1)</i> on page 48, DOI: 10.5852/ejt.2023.889.2245, <a href="http://zenodo.org/record/8269451">http://zenodo.org/record/8269451</a&gt