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Liosomaphis berberidis

Barberry aphid

Identification & Distribution 

Identification & Distribution:

Liosomaphis berberidis apterae are yellow, yellowish green or orange reddish and slightly wax covered. The antennae and legs are mostly pale. The dorsum has no dark sclerites and is more or less distinctly wrinkled. The antennae are shorter than the body, about 0.4-0.5 times its length. The siphunculi are strongly swollen on the apical two thirds with a rather small flange. The cauda is thick and blunt. The body length of Liosomaphis berberidis apterae is 2.0-2.5 mm.

The clarified slide mounts below are of adult viviparous female Liosomaphis berberidis : wingless, and winged.

Micrographs of clarified mounts  by permission of Roger Blackman, copyright AWP  all rights reserved.

The barberry aphid does not host alternate and lives on the underside of leaves of barberry and Oregon grape (Berberis and Mahonia). It has a sexual stage in its life cycle. Liosomaphis berberidis is not attended by ants.


Our particular thanks to Roger Blackman for images of his clarified slide mounts.

We have made provisional identifications from high resolution photos of living specimens, along with host plant identity. In the great majority of cases, identifications have been confirmed by microscopic examination of preserved specimens. We have used the keys and species accounts of Blackman & Eastop (1994)  and Blackman & Eastop (2006)  supplemented with Blackman (1974) , Stroyan (1977) , Stroyan (1984) , Blackman & Eastop (1984) , Heie (1980-1995) , Dixon & Thieme (2007)  and Blackman (2010) . We fully acknowledge these authors as the source for the (summarized) taxonomic information we have presented. Any errors in identification or information are ours alone, and we would be very grateful for any corrections. For assistance on the terms used for aphid morphology we suggest the figure  provided by Blackman & Eastop (2006).

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