Aceria waltheri

Aceria waltheri, possible synonym Cymoptus waltheri, is a species of broom mite, affecting Nothofagus menziesii trees. It is sometimes called Beech Witches Broom Mite.

Taxonomy

The taxonomic status of the species was unclear, as of 2024, with sources treating Cymoptus waltheri as either a synonym of Aceria waltheri, or as an accepted species.

Aceria waltheri is a very small mite that makes a tan broom on silver beech trees.