Taxon Description (Wikipedia)
The
Parasitiformes are a superorder of Acari (treated as a suborder in an outdated classification). Many species are parasitic (most famous of which are ticks), but not all; for example, about half of the 10,000 known species in the suborder Mesostigmata are predatory and cryptozoan, living in the soil-litter, rotting wood, dung, carrion, nests or house dust. A few species have switched to grazing on fungi or ingesting spores or pollen.
The phytoseiid mites, which account for about 15% of all described Mesostigmata are used with great success for biological control.
There are over 12,000 described species of Parasitiformes, and the total estimate is between 100,000 and 200,000 species.
full article at Wikipedia
