Abstract:Two new species ofthe Dasmeusa Melichar (Hemiptera, Auchenorrhyncha, Cicadellidae). Two new speci es ofDasmeusa Melichar, 1926 are described and illustrated : D. basseli sp.n. frem Guyana and D. isabellina sp.n. frem Brazil , Pará. KEY WORDS. Hemiptera, Auchenorrhyncha, Cicadellidae, Dasmeusa Dasmeusa foi descrito por MELlCHAR (1926) com uma pequena diagnose na chave para gêneros. A designação da espécie-tipo: Cieada pauperata Fabricius, 1803 foi feita por EVANS (1947). METCALF (1955) denominou Tettigonia h/ri… Show more
“…Species included in Balacha (Distributional records of previously known species provided by Young, 1977;Zanol and Menezes, 1982;Cavichioli and Sakakibara, 1988;Takiya and Mejdalani, 2004;Mejdalani et al, 2009;and Quintas et al, 2020) Head (Figs. 1a-c).…”
Section: Genus Balacha Melichar 1926mentioning
confidence: 99%
“…Previous records from Colombia are considered erroneous (seeTakiya and Mejdalani, 2004).B. lepidaCavichioli & Sakakibara, 1988. Brazil (state of Paraná).…”
mentioning
confidence: 99%
“…Brazil (states of Paraná and Rio Grande do Sul).B. rubripennisCavichioli & Sakakibara, 1988. Brazil (state of Paraná); Argentina (province of Buenos Aires).B.…”
mentioning
confidence: 99%
“…Brazil (state of Paraná); Argentina (province of Buenos Aires).B. similisCavichioli & Sakakibara, 1988. Brazil (states of Minas Gerais, Rio de Janeiro, Paraná, and Rio Grande do Sul); Argentina (province of Buenos Aires).…”
“…Species included in Balacha (Distributional records of previously known species provided by Young, 1977;Zanol and Menezes, 1982;Cavichioli and Sakakibara, 1988;Takiya and Mejdalani, 2004;Mejdalani et al, 2009;and Quintas et al, 2020) Head (Figs. 1a-c).…”
Section: Genus Balacha Melichar 1926mentioning
confidence: 99%
“…Previous records from Colombia are considered erroneous (seeTakiya and Mejdalani, 2004).B. lepidaCavichioli & Sakakibara, 1988. Brazil (state of Paraná).…”
mentioning
confidence: 99%
“…Brazil (states of Paraná and Rio Grande do Sul).B. rubripennisCavichioli & Sakakibara, 1988. Brazil (state of Paraná); Argentina (province of Buenos Aires).B.…”
mentioning
confidence: 99%
“…Brazil (state of Paraná); Argentina (province of Buenos Aires).B. similisCavichioli & Sakakibara, 1988. Brazil (states of Minas Gerais, Rio de Janeiro, Paraná, and Rio Grande do Sul); Argentina (province of Buenos Aires).…”
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. rafaelisp. nov., D. falciferasp. nov.))) (D. isabellina (D. oriximinasp. nov. (D. pauperata (D. imperialis, D. dinizisp. nov.))))). Dasmeusa was recovered as monophyletic in all trees, being supported by five apomorphic characters.
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