Aphidini (Hemiptera: Aphididae) living on Senecio (Asteraceae), with descriptions of a new genus and three new species
AbstractThe species of Aphidini living on Senecio L. in South America are reviewed. Pehuenchaphisgen. nov. is described; it is an Aphidina genus characterized mainly by the siphunculi on abdominal segment VI when present and by its radicicolous way of life. The type species of the genus Pehuenchaphis agilissimasp. nov. is described and the new combination Pehuenchaphis americana for Sene ciobium americana Mier Durante and Ortego is established. Aphis senecionicoides E.E. Blanchard is redescribed and its neotype is established. Aphis papillosasp. nov. with very large marginal papillae and Aphis malalhuinasp. nov. with short siphunculi are described and differentiated from the previously known Aphis intrusa Ortego and A. senecionicoides. A key for the apterous viviparous females of these seven species and Andinaphis paradoxa Mier Durante et al. is given.