InfluentialPoints.com
Biology, images, analysis, design...
Aphids Find them How to ID AphidBlog
"It has long been an axiom of mine that the little things are infinitely the most important" (Sherlock Holmes)

 

 

Pachypappa warshavensis

Poplar leaf-nest gall aphid

Identification & Distribution  Other aphids on the same host 

Identification & Distribution:

Pachypappa warshavensis forms loose leaf nest galls (see two pictures below) among leaves of white poplar (Populus alba), grey poplar (Populus canescens) or Euphrates poplar (Populus euphratica). The wingless fundatrix is reddish-brown with a body length of 3.5-4.0 mm.

 

Images copyright Dr László Érsek, all rights reserved.

The offspring of the Pachypappa warshavensis fundatrix have a reddish brown abdomen - immatures are shown in the first picture below. They all develop into alates (see second picture below) with a body length of 3.0-3.2 mm. A distinguishing feature of the adult Pachypappa warshavensis is the absence of small hairs on the forewing membrane (cf. Pachypappa vesicalis which has small hairs on the membrane of its forewing). Also there are 4-6 secondary rhinaria with thick sclerotic rims on the third antennal segment, often confined to the distal half of that segment.

 

Images copyright Dr László Érsek, all rights reserved.

Feeding on poplar leaves is concentrated on the petioles, which causes the leavers to fold over, thus creating a leaf nest. The alate Pachypappa warshavensis that develop in the leaf-nest are thought to migrate in June to the roots of poplar (Populus) and willow (Salix) species. Sexual forms return to poplar in autumn. Pachypappa warshavensis is found in Europe and central Asia.

 

Other aphids on same host:

Acknowledgements

We especially thank Dr László Érsek for the images shown above.

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).

Useful weblinks