Many, see text Tydeus is a genus of mites belonging to the family Tydeidae.

[1][2] These are small, usually white, mites with soft bodies covered in striations and each leg terminating in two claws.

[1] The patterns of setae on the legs help to separate Tydeus from other genera in the family.

[2] Mites in this genus occur in various habitats including plant leaves, moss, nests of vertebrate animals, barn debris and stored products.

[1] For example, Tydeus caudatus both preys on eriophyid mites and feeds on downy mildew.