Synonyms and other taxonomic changes
Cincticornia globosa Felt
Galls are 1/15" in diameter (~2 mm)
Forms small spherical galls on leaves of black oak (Quercus velutina) and perhaps other red oaks, usually on the underside.
This is the only spherical gall found on oaks that is not caused by a cynipid wasp. Goldfinches have been observed opening the galls to feed on the larvae (see blog post here