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 : 11

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.

Figures

Fig. 15. Adelges (Gilletteella) cooleyi (Gillette, 1907). Galls on Picea pungens. Photo Whitney Cranshaw, Colorado State University, Bugwood.org (CC BY 3.0 US, https://creativecommons.org/licenses/by/3.0/ us/, downloaded via http://www.forestpests.org/vd/images/5422254-SMPT.jpg).

Fig. 16. Adelges (Gilletteella) cooleyi (Gillette, 1907). A. Gall on Picea (after Carter 1976). B. Antenna of gallicola (modified from Annand 1928). C. Sexupara (after Carter 1971, redrawn and modified from Heie 2004).