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 Adelges (Gilletteella) cooleyi (Gillette, 1907) Figs 15–16 Diagnosis Fund. juv: dorsal sclerites with groups of 8–30 ring-like wax pores. Al. gallicola: 1.7–2.5 mm , wax glands on head and prothorax of al. gallicola with large distinct facets; rhinaria on ant. III–V transverse, slit-like. Gall 25–80 mm , spindle-shaped, needles from widened bases strongly protruding. Chambers separate with green, pink or red openings. Holocyclic and dioecious, alternating between Picea and Pseudotsuga (p. 28). Recorded primary hosts Pinaceae : Picea sitchensis (usually), engelmannii , glauca , jezoensis , mariana , pungens . Distribution D F N S.