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Cryptomyzus maudamanti

Yellow archangel aphid

On this page: Identification & Distribution Other aphids on the same host

Identification & Distribution:

Cryptomyzus maudamanti apterae are pale yellow to light green, occasionally with a faint green longitudinal stripe. Their antennae are about 1.5 times the body length, and the terminal process is about 9.6 times the length of the base. The longest hairs on antennal segment III are longer than the basal diameter of that segment, similar in length to those on the antennal segment I. Abdominal tergites I-IV each bear 8-14 capitate hairs. Their rostrum reaches the hind coxae. The siphunculi of Cryptomyzus maudamanti are slightly but distinctly swollen on the distal part (more so than in Cryptomyzus galeopsidis) and are about 3-4 times as long as the cauda. The body length of Cryptomyzus maudamanti is 1.1-2.3 mm.

The images below show an apterous adult Cryptomyzus maudamanti, dorsally and ventrally, in alcohol.

The alate (see clarified mount below) has 3-4 broad, rather short , brown, dorsal cross bars, much like Cryptomyzus galeopsidis.

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

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

Cryptomyzus maudamanti host alternates from Ribes rubrum (redcurrant) to Lamium galeobdolon (yellow archangel). Oviparae and alate males occur in autumn. Cryptomyzus maudamanti is found in England, Netherlands, Germany, Lithuania, Czech Republic and Italy.

 

Other aphids on same host:

Primary host

Cryptomyzus maudamanti has been recorded from only one Ribes species: Ribes rubrum.

Blackman & Eastop list 18 species of aphid as feeding on redcurrant (Ribes rubrum) worldwide, and provide formal identification keys.

Of those aphid species, Baker (2015) lists 15 as occurring in Britain: Aphis fabae, Aphis grossulariae, Aphis schneideri, Aphis triglochinis, Cryptomyzus galeopsidis, Cryptomyzus galeopsidis ssp. citrinus, Cryptomyzus maudamanti, Cryptomyzus ribis, Eriosoma grossulariae, Eriosoma ulmi, Hyperomyzus lactucae, Hyperomyzus pallidus, Hyperomyzus rhinanthi, Nasonovia ribisnigri and Rhopalosiphoninus ribesinus.

Secondary hosts

Under laboratory conditions some rather sickly Cryptomyzus maudamanti colonies have be established on several Lamium species (and on Galeopsis tetrahit), but in the field Cryptomyzus maudamanti has only been recorded from Lamium galeobdolon.

Blackman & Eastop list 3 species of aphid as feeding on yellow archangel (Lamium galeobdolon) worldwide, and provide formal identification keys.

Of those aphid species, Baker (2015) lists all 3 as occurring in Britain: Aphis lamiorum, Cryptomyzus galeopsidis and Cryptomyzus maudamanti.

Acknowledgements

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

Whilst we make every effort to ensure that identifications are correct, we cannot absolutely warranty their accuracy. We have mostly made 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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