Abstract
The aim of the study was to review the sexual generation of the species of the aphid genus Drepanosiphum Koch. Oviparous females and males of Drepanosiphum iranicum Hille Ris Lambers are described and illustrated in detail. The poorly known sexuales of D. acerinum (Walker), D. aceris Koch, D. braggii Gillette, D. dixoni HRL, D. oregonensis Granovsky and D. platanoidis (Schrank) are re-described and illustrated in detail. Biometric data for the oviparous females and males are reported and keys for the sexual generation of the species that were studied are provided for the first time. The status of the closely related species D. acerinum and D. caucasicum as well as D. platanoidis and D. iranicum is discussed. The newly recognised species D. latifemorum sp. n., which is closely related to D. oregonensis, is described. Blackman and Eastop’s general key to the species that are associated with Acer spp. is modified to include the new species. The most significant diagnostic characters of winged viviparous females of all of the known Drepanosiphum species are also provided and illustrated.
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