Jaime Ortego

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

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.

Six alien aphid species (Hemiptera: Aphididae) recorded for the first time from South America

Abstract Six aphid species: Saltusaphis scirpus Theobald, Myzocallis boerneri Stroyan, Macrosiphoniella absinthii (Linnaeus), Macrocrosiphoniella abrotani (Walker), Macrosiphoniella pseudoartemisiae Shinji and Macrosiphoniella tapuskae (Hottes & Frison) are recorded for the first time in South America. They were all collected in Argentina. Comments for each species and identification keys for Myzocallidina and Macrosiphoniella known in South America are given.

Three new South American species of genus Aphis (Hemiptera: Aphididae) living on species of Euphorbia (Euphorbiaceae).

Three species of Aphis living on species of Euphorbia in Argentina and Chile are described: Aphis tehuelchis Nieto Nafría & López Ciruelos, sp. n., from viviparous females collected in the Argentinean provinces of Santa Cruz and Neuquén, Aphis maulensis Mier Durante & García-Tejero, sp. n., from viviparous females collected in the Chilean Region VII, and Aphis eucollinae López Ciruelos & Ortego, sp. n., from viviparous females, oviparous females and males collected in the Argentinean province of Mendoza. These new species may be distinguished from each other, besides other features, by the abdominal marginal tubercles: in A. tehuelchis these are present on segments 1 and 7 and on several of segments 2 to 6, in A. maulensis they are on segment 1 and on several segments 2 to 6, but lacking on segment 7, and in A. eucollinae they are only on segments 1 and 7. Differences between the new species and those currently known living on Euphorbia around the world are presented.

Aphis species (Hemiptera, Aphididae) living on Mulinum (Apiaceae) in South America, with a description of a new species

Aphis species living on the South American native genus Mulinum are studied. Aphis vurilocensis Nieto Nafría, Brown and López Ciruelos, sp. n. is described from apterous viviparous females. Alate viviparous females, oviparous females and winged males of Aphis roberti are described. Knowledge of intraspecific variability of apterous viviparous females of A. martinezi, A. paravanoi and A. roberti is developed. An identification key of apterous viviparous females of Aphis species living on Mulinum is presented.

First American Records of Aphis intybi (Hemiptera: Aphididae) with Notes on Two Other Related Adventive Species in Argentina

ABSTRACT Aphis intybi Koch is recorded for the first time in North and South America. Measurements for the identification of this species in comparison with Aphis craccivora Koch are given. Aphis cytisorum Hartig is recorded for the third time in Argentina. Data on morphological variation, geographical distribution, and host plants of these species in Argentina are provided. Their morphological identification is supported by comparison of DNA sequences of the mitochondrial cytochrome oxidase subunit 1 (DNA barcode) and subunit 2.

The South American Species of Aphis (Hemiptera: Aphididae: Aphidina) Living on Rhamnaceae And Loranthaceae, with Description of A New Species

Abstract Aphids belonging to the genus Aphis collected on species of Discaria, Condalia, Colletia, and Trevoa (Rhamnaceae), and on Tristerix sp. (Loranthaceae) parasitic on Colletia spinosissima, in Argentina and Chile were studied. Apterous parthenogenetic females (fundatrigeniae and fundatrices), viviparous alatae females, oviparous females, and males of Aphis conflicta, n. sp., are described. A key to Aphidini species that could be found on Rhamnaceae in South America is given.

A New Species of Uroleucon (Hemiptera: Aphididae) Living on Adesmia (Fabaceae)

Abstract We describe the apterous and alate viviparous females of a new species of the subgenus Lambersius of the genus Uroleucon (Hemiptera Aphididae) from Argentina living on Adesmia (Fabaceae). Uroleucon adesmiae sp. n. is the first South American species of this genus exclusively living on a species of Fabaceae. A previous key for the apterous viviparous females of the Uroleucon species recorded in South America is modified to include the new species.

Two South American New Species of Neophyllaphis Subgenus Chileaphis (Hemiptera: Aphididae)

Abstract Two South American new species of Neophyllaphis Takahashi (Aphididae Neuquenaphidinae) are described, Neophyllaphis cuschensis Nieto Nafría & Delfino sp. nov. collected on Podocarpus glomeratus D. Don in Cusco (Peru) and Neophyllaphis iuiuyensis Mier Durante & Ortego sp. nov. collected on Podocarpus parlatorei Pilg. in San Salvador de Jujuy (Argentina). The apterous and alate viviparous females of N. cuschensis and the apterous and alate viviparous females, as well as the oviparous females and males of N. iuiuyensis are described. The differences between the nominotypical subgenus and Chileaphis and also the differences among the 4 species of subgenus Chileaphis, viz. the 2 new species and those already known and found in Chile, N. michelbacheri Essig and N. podocarpini Carrillo are outlined.

Aphid Species (Hemiptera: Aphididae) Reported for the First Time in Tucumán, Argentina

Abstract Aphids (Hemiptera: Aphididae) are considered among the most important pests all around the world. The total number of aphid species recorded in Argentina between 2003 and 2013 has risen from 200 to 237, which demonstrates the continuous introduction and discovery of new species in the territory. Therefore, faunistic studies should be conducted without interruption in areas of interest. The aim of this study was to establish if there were aphid species in Tucuman Province, Argentina that had not been recorded previously in the province. Aphids were collected with modified Moericke yellow water pan traps in potato crops during 2 seasons in 3 regions of Tucumán. Seventeen species, among the 47 species identified, and the genus Illinoia represent new records for the Province.

Aphid (Hemiptera: Aphididae) Diversity in Potato Production Areas in Tucumán, Argentina

Abstract Aphids are recognized as important plant pests worldwide and they are major vectors of viruses. It is necessary to identify the aphid species in an agroecosystem in order to develop appropriate pest management strategies. The aim of this work was to determine the taxonomic diversity of aphid species present in potato crops in different agroecological regions of Tucumán, Argentina. Monitoring was done by 2 methods: modified Moericke yellow water traps were used for the alatae, while the apterae were collected directly from the plants. A total of 15,169 winged aphids were caught and 7,455 apterae colonizing the crop were collected. Fifty-six species were identified, 27 of which were present in all regions surveyed. Differences in species diversity between regions are discussed.