Aphis lugentis (American ragwort aphid)

"We report the discovery of the invasive aphid Aphis lugentis for the first time in Australia. This aphid specialises on Compositae, particularly on Senecio species. Aphids were tended by several ant species at a site on Kangaroo Island, South Australia, which is unlikely to be the location of the original introduction. We recommend the investigation of the distribution of A. lugentis in Australia and its impacts on plant hosts including threatened species and associated native ant and aphid community structures"

Sophie Petit, John J. Weyland, Cameron Brumley, Monica A. Kehoe, Cuiping Wang 

Austral Ecology vol. 47, pp. 137-141