Prostigmata

Prostigmata is a suborder of mites belonging to the order Trombidiformes, which contains the "sucking" members of the "true mites" (Acariformes). Many species are notorious pests on plants. Well-known examples of prostigmatan plant parasites are species of the gall mites (Eriophyidae, e.g. the redberry mite Acalitus essigi), Tarsonemidae (e.g. the cyclamen mite, Steneotarsonemus pallidus), and the spider mites of the Tetranychidae (e.g. the two-spotted spider mite, Tetranychus urticae). Other Prostigmata live as parasites on vertebrates (e.g. Demodex mites of the Demodecidae) or invertebrates (e.g. Polydiscia deuterosminthurus of the Tanaupodidae or the honeybee tracheal mite, Acarapis woodi, of the Tarsonemidae). There are also some forms (e.g. Smarididae) that are predators of small invertebrates – including smaller Prostigmata – yet others have a more varied lifestyle (e.g. Tydeidae) or switch their food sources as they mature (e.g. Erythraeidae). The suborder also includes the family Halacaridae (marine mites). Some of the Prostigmata parasitizing vertebrates are of medical relevance due to causing skin diseases in humans. These include for example harvest mites ("chiggers") of the Trombiculidae.

from Wikipedia