Abstract
A new species of the diverse Neotropical sharpshooter genus Erythrogonia Melichar, 1926 is described and illustrated from the Mantiqueira mountain range, municipality of Maria da Fé, state of Minas Gerais, southeastern Brazil. The new taxon is associated with olive orchards and has been implicated as a vector of the bacterium Xylella fastidiosa Wells et al., 1987, which causes a disease known in Brazil as olive leaf scorch syndrome. Erythrogonia sinvali sp. nov. can be distinguished from the other 90 known species of the genus by the following combination of features: (1) crown black without conspicuous contrasting spots; (2) frons with large yellow median spot; (3) pronotum black with large yellow area covering most of disk; (4) forewing dark red, without contrasting spots or stripes, costal margin narrowly black, apical portion dark brown; (5) aedeagus elongate, curved dorsally, with pair of spiniform apical processes; (6) paraphyses greatly reduced; (7) basal portion of male anal tube with pair of spiniform curved processes; (8) posterior margin of female abdominal sternite VII broadly emarginate and with broad central lobe; (9) female sternite VIII with sclerotized areas, including a transverse bar located at bases of ovipositor valvulae I, followed by a pair of elongate sclerites and a posterior bilobed sclerite. Both males and females of the new species are described in detail. A putative group of five species within Erythrogonia is preliminarily proposed, including the new taxon, E. separata Melichar, 1926, E. dorsalis (Signoret, 1853), E. calva (Taschenberg, 1884), and E. melichari Schmidt, 1928. Among these species, the male terminalia of E. sinvali sp. nov. are more similar to those of E. separata.
References
Carvalho, R.A. & Mejdalani, G. (2014) Remarkable morphological features of taxonomic interest in the female genitalia of five Erythrogonia species (Hemiptera: Cicadomorpha: Cicadellidae). Zootaxa, 3872 (3), 275–290. https://doi.org/10.11646/zootaxa.3872.3.4
Cavichioli, R.R. (2008) A new Neotropical sharpshooter genus Spinagonalia (Insecta, Hemiptera, Cicadellidae, Cicadellinae) with description of a new species from Citrus orchards and grapevines. Zootaxa, 1746, 61–64.
Cavichioli, R.R., Santos, A.C. & Mejdalani, G. (2017) Description of a second species of Nannogonalia Young, 1977 (Insecta: Hemiptera: Cicadellidae: Cicadellini) from the Atlantic Forest of south Brazil. Studies on Neotropical Fauna and Environment, 52, 11–17. https://doi.org/10.1080/01650521.2016.1245068
Freytag, P.H. (2015) Twenty-one new species of leafhoppers in the genus Erythrogonia (Hemiptera: Cicadellidae: Cicadellinae) from South America. Transactions of the American Entomological Society, 141, 369–403. https://doi.org/10.3157/061.141.0306
Hamilton, K.G.A. (1981) Morphology and evolution of the rhynchotan head (Insecta: Hemiptera, Homoptera). Canadian Entomologist, 113, 953–974. https://doi.org/10.4039/Ent113953-11
Hill, B.G. (1970) Comparative morphological study of selected higher categories of leafhoppers (Homoptera: Cicadellidae). Ph.D. dissertation, North Carolina State University, Raleigh, North Carolina and University Microfilms, Ann Arbor, Michigan, xi + 187 pp.
McKamey, S.H. (2007) Taxonomic catalogue of the leafhoppers (Membracoidea). Part 1. Cicadellinae. Memoirs of the American Entomological Institute, 78, 1–394.
Medler, J.T. (1963) A review of the genus Erythrogonia Melichar (Homoptera, Cicadellidae). Miscellaneous Publications of the Entomological Society of America, 4, 1–33.
Mejdalani, G. (1993) Morfologia da cabeça de Versigonalia ruficauda (Walker, 1851), com notas sobre a terminologia (Homoptera, Cicadellidae, Cicadellinae). Revista Brasileira de Entomologia, 37, 279–288.
Mejdalani, G. (1994) A new genus of Cicadellini from Brazil (Homoptera, Cicadellidae, Cicadellinae). Revista Brasileira de Biologia, 54, 219–222.
Mejdalani, G. (1998) Morfologia externa dos Cicadellinae (Homoptera, Cicadellidae): comparação entre Versigonalia ruficauda (Walker) (Cicadellini) e Tretogonia cribrata Melichar (Proconiini), com notas sobre outras espécies e análise da terminologia. Revista Brasileira de Zoologia, 15, 451–544. https://doi.org/10.1590/S0101-81751998000200015
Mejdalani, G., Takiya, D.M. & Carvalho, R.A. (2006) Notes on Neotropical Proconiini (Hemiptera: Cicadellidae: Cicadellinae), IV: lectotype designations of Aulacizes Amyot & Audinet-Serville species described by Germar and revalidation of A. erythrocephala (Germar, 1821). Arthropod Systematics & Phylogeny, 64, 105–111.
Mejdalani, G. & Cavichioli, R.R. (2016) A remarkable new species of the sharpshooter genus Erythrogonia Melichar (Hemiptera; Cicadellidae: Cicadellini) from southern Brazil with taxonomic notes on the genus. Zootaxa, 4173 (5), 483–488. https://doi.org/10.11646/zootaxa.4173.5.5
Melichar, L. (1926) Monographie der Cicadellinen. III. Annales Historico-Naturales Musei Nationalis Hungarici, 23, 273–394.
Nielson, M.W. (1965) A revision of the genus Cuerna (Homoptera, Cicadellidae). Technical Bulletin of the United States Department of Agriculture, 1318, 1–48.
Oman, P.W. (1949) The Nearctic leafhoppers (Homoptera: Cicadellidae). A generic classification and check list. Memoirs of the Entomological Society of Washington, 3, 1–253.
Schneider, N.A., Azevedo Filho, W.S. & Giacomelli, F. (2017) Population fluctuation and faunistic analysis of sharpshooters (Hemiptera: Cicadellidae: Cicadellinae) in plum orchards in the municipality of Protásio Alves, Rio Grande do Sul State, Brazil. Journal of the Kansas Entomological Society, 90, 269–282. https://doi.org/10.2317/JKES150406.1
Shorthouse, D.P. (2010) SimpleMappr, an online tool to produce publication-quality point maps. Available from http://www.simplemappr.net (accessed 14 December 2020).
Wilson, M.R., Turner, J.A. & McKamey, S.H. (2009) Sharpshooter leafhoppers of the world (Hemiptera: Cicadellidae subfamily Cicadellinae). National Museum Wales. Available from: http://naturalhistory.museumwales.ac.uk/sharpshooters/home.php (accessed 7 December 2020).
Young, D.A. (1968) Taxonomic study of the Cicadellinae (Homoptera, Cicadellidae). Part 1, Proconiini. Bulletin of the United States National Museum, 261, 1–287. https://doi.org/10.5962/bhl.part.20869
Young, D.A. (1977) Taxonomic study of the Cicadellinae (Homoptera: Cicadellidae). Part 2. New World Cicadellini and the genus Cicadella. Technical Bulletin of the North Carolina Agricultural Experiment Station, 239, i–vi + 1–1135.
Young, D.A. (1986) Taxonomic study of the Cicadellinae (Homoptera: Cicadellidae). Part 3, Old World Cicadellini. Technical Bulletin of the North Carolina Agricultural Experiment Station, 281, 1–639.
Young, D.A. & Beirne, B.P. (1958) A taxonomic revision of the leafhopper genus Flexamia and a new related genus (Homoptera: Cicadellidae). Technical Bulletin of the United States Department of Agriculture, 1173, 1–53.