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The genus Uroleucon (Hemiptera: Aphididae: Macrosiphini) in Argentina, with descriptions of five new species

  • Juan M. Nieto Nafría (a1), M. Pilar Mier Durante (a1), Jaime Ortego (a2) and M. Victoria Seco Fernández (a3)
Abstract

Uroleucon is one of the largest genera of Macrosiphini, with 216 known species; it is one of the few genera of Aphidinae to have a diversification in South America, with 15 native species and 1 subspecies. Moreover, 7 introduced species have been recorded in South America. Five new species from Argentina are described herein: Uroleucon malarguense Ortego and Nieto Nafría, sp. nov., U. mendocinum Mier Durante and Ortego, sp. nov., U. patagonicum Nieto Nafría and Seco Fernández, sp. nov., U. payuniense Ortego and Nieto Nafría, sp. nov., and U. riojanum Nieto Nafría and Mier Durante, sp. nov. One Palearctic species, U. jaceae (Linnaeus), has been recorded for the first time in South America, and thus 28 species and 1 subspecies are now known from South America. Uroleucon essigi Carvalho and U. chilense (Essig) are recorded for the first time from Argentina, and 20 of these 29 taxa are known for this country. New morphological and bionomic data from some previously known species are given. Alate viviparous females of U. gochnatiae Delfino and oviparae and males of U. bereticum (Blanchard) and U. macolai (Blanchard) are described. A taxonomic discussion about native South American species of Uroleucon is given, and we include them at present in the subgenus Lambersius. A key is provided for the identification of apterous and alate viviparous females.

Avec 216 espèces connues, Uroleucon est l'un des plus importants genres de Macrosiphini, il est en outre l'un des rares genres d'Aphidinae qui se soit diversifié en Amérique du Sud; il est représenté sur ce continent par 15 espèces et une sous-espèce endémiques auxquelles il convient d'ajouter 7 espèces introduites. Cinq nouvelles espèces sont décrites d'Argentine: Uroleucon malarguense Ortego et Nieto Nafría, sp. nov., U. mendocinum Mier Durante et Ortego, sp. nov., U. patagonicum Nieto Nafría et Seco Fernández, sp. nov., U. payuniense Ortego et Nieto Nafría, sp. nov., and U. riojanum Nieto Nafría et Mier Durante, sp. nov. L'espèce paléarctique U. jaceae (Linnaeus) est mentionnée pour la première fois en Amérique du Sud. À ce jour 28 espèces et une sous-espèce sont recensées dans cette zone. Uroleucon essigi Carvalho et U. chilense (Essig) sont citées pour la première fois de l'Argentine; et 20 de ces 29 taxa sont connus de ce pays. Nouvelles données morphologiques et bionomiques de quelques sont apportées. Les femelles vivipares ailées d'U. gochnatiae Delfino et les sexués (ovipares et mâles) d'U. bereticum (Blanchard) et d'U. macolai (Blanchard) sont décrits. La position taxonomique des espèces endémiques sud-américaines d'Uroleucon est discutée; nous proposons de les placer dans le sous-genre Lambersius. Une clé d'identification des femelles vivipares aptères et ailées est présentée.

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Corresponding author
1Corresponding author (e-mail: dbajnn@unileon.es).
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The Canadian Entomologist
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