Adelges (Aphrastasia) pectinatae (Cholodkovsky, 1888)

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

Adelges (Aphrastasia) pectinatae (Cholodkovsky, 1888)

Figs 41–44

Diagnosis

Neosistens 0.3–0.4 mm, shiny black with a double spinal crest and a marginal rim of more or less curly wax ribbons, and a posterior tuft of wax wool. Older sistentes and progredientes dark grey, embedded in a tuft of thick, stiff, ‘half-pipe’ shaped wax filaments. Spinal and pleural sclerites fused on all segments, and spinopleural sclerites also fused to marginal sclerites of abdominal tergites 6–8. Older sistentes and progredientes dark grey to purplish grey, richly exuding thick, curly wax filaments. Holocyclic and dioecious, alternating between spruce ( Picea , p. 8) and fir ( Abies ). Predominantly in parks and plantations, scattered on needles, both upper- and undersides, often in great number. Not ant-attended. Apparently predominantly anholocyclic on Abies . Not ant-attended.

Recorded secondary hosts

Pinaceae : Abies alba *, amabilis *, balsamea *, concolor *, fraseri *, grandis *, koreana *, lasiocarpa *, nordmanniana , procera , sibirica *, veichtii, spp.

Distribution

F N S.

B6 (B5) On bark of stems, branches and twigs ............................ Adelges (Dreyfusia) Börner, 1908

Figures

Fig. 41. Adelges (Aphrastasia) pectinatae (Cholodkovsky, 1888). Apterous progredientes on undersides of needles of Abies koreana. Note the conspicuous coarse wax filaments.

Fig. 42. Adelges (Aphrastasia) pectinatae (Cholodkovsky, 1888). A. Apterae (and neosistentes) on Abies concolor. B–C. Apterae with eggs on A. alba and Abies sp. D. Adult and juvenile apterae on A. koreana (freeze-dried sample). E. Juvenile alata on A. sibirica.

Fig. 43. Adelges (Aphrastasia) pectinatae (Cholodkovsky, 1888) on needles of Abies concolor. A–C. Apterae with first instar hibernating nymphs (neosistens). D–H. Neosistens.

Fig. 44. Adelges (Aphrastasia) pectinatae (Cholodkovsky, 1888). A. Adult progrediens, showing arrangement of plates and wax gland pits (after Inouye 1953, modified). Note the wax gland pattern, giving rise to ‘half-pipe’-shaped wax filaments. B. Hibernating first instar nymph (neosistens), with wax-exuding areas shaded (after Inouye 1953, modified and redrawn from Pashchenko 1988).