Hille Ris Lambers. 1953. Contributions to a monograph of the Aphididae of Europe. V. The genera Rhopalosiphoninus Baker, 1920; Eucarazzia Del Guercio, 1921; Rhopalomyzus Mordv. , 1921; Chaetosiphon Mordv. , 1914; Cryptomyzus Oestl. , 1922; Pleotrichophoru