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Liosomaphis berberidis

Barberry aphid

On this page: Identification & Distribution 

Identification & Distribution:

Liosomaphis berberidis apterae are greenish yellow or reddish orange (see pictures below) with a slight wax powdering. The antennae and legs are mostly pale, and the antennae are shorter than the body, about 0.4-0.5 times its length. The dorsum has no dark sclerites and is more or less distinctly wrinkled. The siphunculi are strongly swollen on the apical two thirds with a rather small flange, and are 1.8-2.3 times the length of the cauda. The cauda is thick and blunt. The body length of Liosomaphis berberidis apterae is 2.0-2.5 mm.

The alate Liosomaphis berberidis has the head, thorax, antennae and tips of legs darker than in the apterous viviparous female. Some tergites may have pale marginal and dorsal sclerites, sometimes fused into cross bands.

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 (Berberis) and Oregon grape (Mahonia). It has a sexual stage in its life cycle. Liosomaphis berberidis is not attended by ants. It is widely distributed in Europe, Asia, North America and Australasia.

Acknowledgements

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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