REVISION OF THE NORTH AMERICAN APHID GENUS BIPERSONA HOTTES (HEMIPTERA: APHIDIDAE)

摘要

Adult female apterae and alates of the genus Bipersona Hottes are described and illustrated. Bipersona torticauda (Gillette), previously a junior synonym of Bipersona ochrocentri (Cockerell), is now considered a valid species. The aphid genus Bipersona Hottes (1926) was proposed for a group of thistle-inhabiting aphids with unusual morphology of the cauda and anal plate. The cauda of these species is elongate, narrow, and appears twisted or constricted along its length, and the anal plate has a posteriorly directed projection. Bipersona lives on various species of thistles in the genus Cirsium (Asteraceae) and the aphids invariably are attended by ants. The recent synonymy (Eastop and Blackman 2005) of Bipersona hottest Knowlton and Smith (= Eomacrosiphum nigromaculosum MacDougall) resulted in a monotypic genus.