Aceria cerrea (Nalepa, 1898)
on Quercus
Quercus cerris, Tilburg, 24.ix.2020 © Roelof Jan Koops
same leaf, underside

Quercus cerris, Hungary, Budapest, 3.vi.2016 © László Érsek

same leaf, underside
Quercus cerris, Hungary, Budapest, Kamaraerdő, 25.vii.2017 © László Érsek: erineum, detail

Quercus cerris, België, Brussel, Evere: Moeraske, 6.v.2014 © Sébastien Carbonnelle

underside of the leaf
gall
epiphyllous or hypophyllous bulges, the corresponding other side covered by an erineum. Hairs partly long and contorted, partly shorter, cylindric or weakly mushroom-shaped. The mites also cause buds on 6-8 year old branches to become hypertrophied (Skoracka ao, 2005a).
host plants
Fagaceae, monophagous
Quercus cerris.
Sometimes also cited from Q. pubescens, robur
synonyms
Aceria ilicis cerrea; Eriophyes cerreus; Eriophyes cerri: Bellmann, 2012.
references
Buhr (1965a), Denizhan, Monfreda, de Lillo & Çobanoglu (2015a), Farkas (1965a), Hellrigl (2006a, 2010a), Houard (1908a), Jočić & Petanović (2012a), Petanović & Stanković (1999a), Ripka (2007a), Skoracka, Lewandowski & Boczek (2005a), Stănescu (2009a), Xue, Wang, Song & Hong (2009a).