ABSTRACT
Blanchardaphis was erected for two Argentinian species of aphids very similar to Uroleucon, but distinguished by several characters. Here, we examined morphology and DNA sequences of Blanchardaphis specimens from Argentina and Chile. We further conducted a phylogenetic analysis to determine the relationship of Blanchardaphis to Uroleucon. We found minor morphological and genetic differences between Blanchardaphis samples based on geography, which appear to be population-level variation. On the basis of current evidence, we conclude that B. poikila (Ortego, Nieto Nafra Mier Durante, 1997) is synonymous with B. capitophoroides (Blanchard, 1942), and that Blanchardaphis Ortego, Nieto Nafra Mier Durante, 1998 is synonymous with Lambersius Olive, 1965 (subgenus of Uroleucon) sensu Nieto Nafra et al. 2007 or alternatively with the subgenus Uroleucon.
