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Willow - angelica aphidOn this page: Identification & Distribution Other aphids on the same host
Identification & Distribution:
The adult apterae of Cavariella archangelicae are green or yellowish. Their antennae are 0.35-0.39 times the length of the body and the terminal process is1.5-2.0 times the base of the last antennal segment. Their siphunculi are more than twice as long as the cauda with the distal half somewhat swollen in a nearly symmetrical way. The supracaudal process has a broad basal part and is tongue-shaped about 0.7-1.0 times the length of the cauda. The body length of Cavariella archangelicae apterae is 1.5-2.6 mm.
The clarified slide mounts below are of adult viviparous female Cavariella archangelicae : wingless fundatrix, and winged.
The willow - angelica aphid host alternates from willow (Salix spp.) to angelica (Angelica). Sexual forms occur in October. The distribution of Cavariella archangelicae is cosmopolitan.
Other aphids on same host:
For lists of of aphid species on willows (Salix) see our aphids on willow page.
Blackman & Eastop list 15 species of aphid as feeding on wild angelica (Angelica sylvestris) worldwide, and provide formal identification keys.
Of those aphid species, Baker (2015) lists 11 as occurring in Britain: Aphis fabae, Aphis gossypii, Aphis spiraecola, Cavariella aegopodii, Cavariella archangelicae, Cavariella konoi, Cavariella pastinacae, Cavariella theobaldi, Dysaphis angelicae, , Hyadaphis foeniculi and Hyadaphis passerinii.