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The small Aceria ilicis provokes cecidia (galls) in the underside of Holm oak leaves (Quercus ilex). These cecidia consist on an uprise of the leaf anverse edge accompanied by oxided-coloured stains that consist of dense and abnormal starlike hairiness. A. ilicis also attacs Quercus coccifera. These Eriophydae acarines are minuscule mites that cause variated galls in plants , inside which live comfortably. Another Eriophydae is Eriophyes tiliae which produces red little horns on the leaves of lime trees (Tilia platyphyllos).
Spotted on a Holm oak leaf.
Camera Model: NIKON D300. Exposure Time: 1/60 sec.; f/32; ISO Speed Rating: 800. Exposure Bias: 0 EV. Focal Length: 300.0 mm. Flash fired