Vasates aceriscrumena

Vasates aceriscrumena, the maple spindle-gall mite, is an eriophyid mite in the genus Vasates, which causes fusiform galls on the upper surfaces of the leaves of certain maple species[1] in the eastern United States.

While unsightly to some, they do not cause major damage to the maple trees themselves, and don't often distort the leaves.

In early spring, they induce gall formation by feeding on leaf buds.

Asexual reproduction occurs within the galls, with mature mites emerging in late June to mid-July.

[3] The specific epithet aceriscrumena likely combines a Latin word "crumena, meaning "money bag or purse,"[4] with the genitive of Acer, or maple, "aceris."