900+, see text Aceria is a genus of mites belonging to the family Eriophyidae, the gall mites.

These tiny animals are parasites of plants.

[1] A few are economically significant pests, while others are useful as agents of biological pest control of invasive plants such as rush skeletonweed (Chondrilla juncea), creeping thistle (Cirsium arvense), and field bindweed (Convolvulus arvensis).

[2]) In 2017, a new species, Aceria pycnocomi was found on Pycnocomon rutifolium in Spain.

This Trombidiformes article is a stub.