Andricus zappellai Kieffer, 1901
on Quercus
Quercus trojana galls (from Houard, 1908a)
parasite
The axis of a male catkins is transformed into a fleshy, red gall, 4-6 mm thick and 5-13 mm long. The gall has a number of swellings, each one containing a gall chamber wit a thin, woody wall. The flowers have totally disappeared; a part of the gall bears erect, greyish hairs.
host plants
Fagaceae, narrowly monophagous
Quercus trojana.
distribution within Europe
references
Houard (1908a).