Adelges (Dreyfusia) nordmannianae (Eckstein, 1890)

Albrecht, Anders Christian, 2017, Illustrated identification guide to the Nordic aphids feeding on Conifers (Pinophyta) (Insecta, Hemiptera, Sternorhyncha, Aphidomorpha), European Journal of Taxonomy 338, pp. 1-160 : 20-21

Adelges (Dreyfusia) nordmannianae (Eckstein, 1890)

Figs 45–46

Diagnosis

Neosistens rather similar to those of A. pectinatae (see above), but wax ribbons thinner and more strongly curled, and spinal and pleural sclerites on mesothorax, metathorax and abdominal tergites 1–5 separate (although sometimes touching). Older sistentes and progredientes dark grey, embedded in fine, curly wax wool. Wax pore plates on inner margins of meso- and metathoracic spinal sclerites containing numerous small, mostly rounded, pits arranged in 2–4 areas of rather rounded shape, the most central area containing 7–12 pits. Found on bark, usually on young branches and twigs, single specimens occasionally on needles (my own record). Not ant-attended.

Recorded secondary hosts

Pinaceae : Abies alba *, balsamea , cephalonica , concolor , grandis , nordmanniana , procera , sibirica , veitchii , spp.

Distribution

D N S.

Figures

Fig. 45. Adelges (Dreyfusia) nordmannianae (Eckstein, 1890) on Abies alba. A–D. Apterous progredientes with eggs. Note the thin, woolly wax filaments. E–G. First instar hibernating nymphs (neosistens).

Fig. 46. Adelges (Dreyfusia) nordmannianae (Eckstein, 1890). A. Gallicola (after Carter 1971, redrawn from Heie 2004). B–C. Hibernating first instar nymph (neosistens). B. Habitus, showing arrangement of sclerites plates and wax gland pits (after Schneider-Orelli 1947, modified and redrawn from Börner & Heinze 1957). C. Spinal sclerites of meso- and metathorax, left side (after Pschorn-Walcher & Zwölfer 1958, modified and redrawn).