Acyrthosiphon bidentis Eastop 1953 = Acyrthosiphon ilka Mordvilko 1914 (valid name)

African populations identified as A. bidentis tend to have longer, more slender SIPH than Eurasian populations of A. ilka, but have almost identical host plant preferences across several families ( Papaveraceae, Compositae, Cruciferae, Linaceae), so that A. bidentis is best considered as a geographical variant of A. ilka . Remaudière and Remaudière (1997) questioned the validity of Mordvilko’s species but the 1914 description is detailed and seems unambiguous.