Andricus aries (Giraud, 1859)

Hymenoptera, Cynipidae

on Quercus

Andricus aries gall

Quercus robur, Diemer bos

basal part of the gall

same, with exit hole

Andricus aries: gall on Quercus robur

Qercus robur, Zeewolde, Harderbos © Hans Jonkman: three pictures to show the variability of the gall: from almost no appendages …

Andricus aries: gall on Quercus robur

… to bearing short appendages …

Andricus aries: gall on Quercus robur

… to consist of little more than appendages.

Andricus aries: galls on Quercus robur

declining galls (early July)

Andricus aries: gall on Quercus robur

Quercus robur, Zeewolde, Harderbos © Hans Jonkman; very inconspicuous gall (mid-August)

hostplants

Fagaceae, monophagous

Quercus petraea, pubescens, robur.

notes

Originally a species from southeastern Central Europe, but since the start of the 21th century widespread in NW Europe; first record in the Netherlands by Jan-Willem Wertwijn.

Although it seems that, at least in NW Europe, the species only has an asexual generation, Walker experimentally has shown that fresh females may deposit eggs in axillary buds of Quercus cerris.

references

Bellmann (2012a), Buhr (1965a), Chinery (2011a), Hellrigl (2009a, 2012a), Hellrigl & Bodur (2015a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Koops (2013a), Kwast (2012a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a), Walker (2001a), Williams (2010a).

15/01/2017

pub 15.i.2017 · mod 29.vi.2017