Trigonaspis megaptera (Panzer, 1801)

on Quercus, asexual generation

Trigonaspis megaptera FF on Quercus robur

Quercus robur, Biddinghuizen, Spijk- en Bremerbergbos © Hans Jonkman

Trigonaspis megaptera FF on Quercus robur

detail

Trigonaspis megaptera galls

Quercus robur, Tilburg, de Kaaistoep

Trigonaspis megaptera opened gall

opened gall

Trigonaspis megaptera FF: galls on Quercus robur

Quercus robur, France, dép. Loiret, Pers-en-Gâtinais © Eugène Vandebeulque

parasite

The galls occur only late in autumn, often when the leaves are colouring already. The thin-walled galls mostly are arranged in rows at the underside of the leaves, on the major veins. They are more or less reniform and have a characteristic yellowish green colour. At the end of the season they turn brown and become more or less globular.

hostplants

Fagaceae, monophagous

Quercus frainetto, petraea, pubescens, robur.


on Quercus, sexual generation

Trigonaspis cf megaptera FM gall on Quercus robur

Quercus robur, Roggebotzand (Flevoland) © Hans Jonkman

Trigonaspis cf megaptera FM

Quercus robur, Vorden; © Arnold Grosscurt

gall

galls, often hidden by litter, at the foot of stems, but also of seedlings and suckers.

hostplants

Fagaceae, monophagous

Quercus frainetto, petraea, pubescens, robur.

synonyms

Trigonaspis renum, Hartig, 1840.

notes

The sexual generation cannot be distinguished from the one of Trigonaspis synaspis. At least in the Netherlands synaspis is much more rare than megaptera (Roskam).

inquilines

Synergus thaumacerus.

references

Azmaz & Katılmış (2015a), Béguinot (2006a), Bellmann (2012a), Buhr (1965a), Ceresa (2015a), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Kollár (2007a, 2011a), Koops (2013a), Kwast (2012a, 2014a), Lambinon, Carbonelle & Claerebout (2015a), Lehmann & Hannover (2016a), Máca (2012a), Meiklejohn (2005a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Mutun & Dinç (2014a), Nieves-Aldrey (2001a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a), Williams (2010a).

mod 16.xi.2017