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Aceria trichophila (Actinedida: Eriophyidae) Blue Oak Erineum Mite Mines Road, Livermore, Alameda County, California August 21, 2011 Leaf gall on blue oak (Quercus douglasii), ventral side of leaf.
Leaf gall on blue oak (Quercus douglasii), ventral side of leaf.
