Illustrated identification guide to the Nordic aphids feeding on Conifers (Pinophyta) (Insecta, Hemiptera, Sternorhyncha, Aphidomorpha) Author Albrecht, Anders Christian text European Journal of Taxonomy 2017 2017-07-24 338 1 160 journal article 22023 10.5852/ejt.2017.338 be9f3ab9-3131-4e11-8d29-a94275ffaac9 2118-9773 3834349 86786AB1-4A1A-4A1E-B42B-53B73D66ED60 Brachycaudus (Brachycaudus) helichrysi (Kaltenbach, 1843) Diagnosis Aptera 1–1.8 mm , pale green, yellow or yellowish white, ovoid, slightly dorsoventrally flattened. Appendages apically darkened. Siphunculi conical, 1–1.5 times as long as wide. Holocyclic, dioecious, alternating between Prunus (Rosaceae) and Asteraceae and Boraginaceae . Cryptomeria is hardly a true host. Often attended by ants, but no record from conifers. Recorded coniferous hosts Cupressaceae : Cryptomeria japonica ? Distribution D F I N S. F6 (F2 F5) Siphunculi parallel-sided, more than 4 times as long as wide .......... Myzus Passerini, 1860