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 Key C. Aphids on larch ( Larix ) Synopsis C1 (C2) Siphunculi absent. Apterae: antennae with at most 3 segments. Body less than 2.5 mm , often covered with white wax wool or filaments ....................... Adelges Vallot, 1836 p. 24 C2 (C1) Siphunculi present. Antennae with at least 4 segments. Body usually larger than 2.5 mm . Wax, if present, in the form of dusting or well-defined pattern .......................................C3 C3 (C4) Siphunculi present as pores raised on cones ............................... Cinara Curtis, 1835 p. 26 C4 (C3) Siphunculi elongate, tubular ..................................................... Aphis Linnaeus, 1758 p. 27 C1 (C2) Siphunculi absent. Apterae: antennae with at most 3 segments. Body less than 2.5 mm , often covered with white wax wool or filaments ................................. Adelges Vallot, 1836