Adelges (Gilletteella) cooleyi (Gillette, 1907)

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 : 28

Adelges (Gilletteella) cooleyi (Gillette, 1907)

Figs 70–71

Diagnosis (see also p. 11)

Apterae brownish black, covered with wax wool. Neosistens 0.3–0.4 mm, black. Dorsum with rounded wax gland plates exuding sparsely white wax. Marginally with glands exuding broad and fairly short wax ribbons, and posteriorly with a tuft of long narrow ribbons. Al. sexuparae 1.2–1.7 mm; abdomen with normal spinal and pleural wax gland plates on all segments; rhinaria at most reaching half-way around the segments. Holocyclic and dioecious, alternating between Picea (p. 11) and Pseudotsuga .

Recorded secondary hosts

Pinaceae : Pseudotsuga menziesii *.

Distribution

D F N S.

Figures

Fig. 70. Adelges (Gilletteella) cooleyi (Gillette, 1907). Apterae and neosistentes on needles of Pseudotsuga menziesii.

Fig. 71. Adelges (Gilletteella) cooleyi (Gillette, 1907). A. Gallicola (after Carter 1971, redrawn from Heie 2004). B. Neosistens (after Schneider-Orelli 1947). C. Antenna of gallicola (after Annand 1928, modified).