The solitary oak leafminer (Cameraria hamadryadella) is a moth of the Gracillariidae family. It is known from Canada (Québec and Manitoba) and the United States (including Kentucky, Illinois, New York, Pennsylvania, Florida, Vermont, Maine, Michigan, Virginia, Ohio, Colorado, Texas and Connecticut).
The wingspan is 6.5-8.5 mm. Adults are on wing in spring in two generations per year.
The larvae feed on Gaylussacia and Quercus species, including Quercus alba, Quercus benderi, Quercus bicolor, Quercus coccinea, Quercus ilicifolia, Quercus lyrata, Quercus macrocarpa, Quercus macrocarpa, Quercus marilandica, Quercus obtusiloba, Quercus prinoides, Quercus prinus, Quercus robur, Quercus rubra, Quercus stellata and Quercus velutina. They mine the leaves of their host plant. The mine consists of an upperside blotch. They overwinter in leaf litter as diapausing larvae within the leaf mine.