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Macrosiphum euphorbiellum (=Macrosiphum amygdaloides)

Euphorbia aphid

Identification & Distribution 

Identification & Distribution:

Macrosiphum euphorbiellum apterae are usually green sometimes with a darker green longitudinal stripe. Their eyes are reddish and the antennae are dusky. Previously M. euphorbiellum had been listed as a synonym of M. euphorbiae. Macrosiphum euphorbiellum is very similar to Macrosiphum euphorbiae but the apical parts of the femora are black, markedly darker than is the case for Macrosiphum euphorbiae. The siphunculi are pale with the tips darker. The cauda is rather pointed and not constricted. The body length of Macrosiphum euphorbiellum apterae is 2.0-4.0 mm.

The clarified slide mounts below are of adult viviparous female Macrosiphum euphorbiellum (= Macrosiphumamygdaloides) : wingless, and winged.

 

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

The euphorbia aphid does not host alternate but spends its entire life cycle on spurge especially wood spurge (Euphorbia amygdaloides) and red spurge (Euphorbia characias).

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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