Pediaspis aceris (Gmelin, 1790)

Hymenoptera, Cynipidae

on Acer, agamous generation

Pediaspis aceris: agamous generation gall on Acer pseudoplatanus root

Acer pseudoplatanus, Belgium, East Flanders, Geraardsbergen @ Bart Uitterhaegen

note

Root gall, initially soft, later woody; larva solitary. Ripe gall in autumn; the waps emerge in the autumn of the subsequent third year.


on Acer, sexual generation

Pediaspis aceris galls

Acer pseudoplatanus, Belgium, prov. Namur, Onoz; © Jean-Yves Baugnée

Pediaspis aceris galls

another leaf

Pediaspis aceris galls

upperside of the leaf

Pediaspis aceris galls

galls may occur as well in the inflorescence

Pediaspis aceris FM: gall on Acer monspessuanum

Acer monspessulanum, Spanish Pyrenees, Huesca; © Ben van As

Pediaspis aceris parasitised gall

Acer pseudoplatanus, Belgium, prov. Namur, Saint-Servais, Asty-Moulin: parasitised gall; © Jean-Yves Baugnée

Dichatomus acerinus gall

Acer pseudoplatanus, France, Isère, Rhône-Alpes, Les Abrets. Normally the galls are thin-walled, with a proportionally large central space. In this case the gall has been taken over by the inquiline Dichatomus acerinus, that as it where has formed a gall within a gall. © Arnold Grosscurt.

Dichatomus acerinus gall

galls parasitised by Dichatomus acerinus

Pediaspis aceris: gall on shoot of Acer pseudoplatanus

Acer pseudoplatanus, België, prov. Vlaams-Brabant, Dworp, begin januari 2014 © Pierre Kestemont: occasionally the galls are formed on the fruits or, like here, a young shoot

Pediaspis aceris: fruit gall on Acer pseudoplatanus

Acer pseudoplatanus, Belgium, prov. Namur, Huy, Vallon de la Solières © Stéphane Claerebout: fruit gall

gall

Galls thin-walled, unilocular. Wasps emerge in July from the galls.

hostplants

Sapindaceae, monophagous

Acer ? campestre, heldreichii, hyrcanum, monspessulanum, opalus & subsp.obtusatum, platanoides, pseudoplatanus, velutinum.

synonyms

Pediaspis pseudoplatani Mayer, 1779.

inquilines

Dichatomus acerinus, Lauthia acerina.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Béguinot (2002e,h, 2003a, 2005a, 2006c, 2012a), Bellmann (2012a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Groom (2011a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Koops (2013a), Kwast (2012a, 2014a), Lambinon, Carbonelle & Claerebout (2015a), Lambinon, Schneider & Chevin (2003a), Melika (2006a), Nieves-Aldrey (2001a), Pellizzari (2010a), Roskam (2009a), Tomasi (2003a, 2014a).

14/01/2017

pub 4.ii.2017 · mod 28.vi.2017