The Trombidiformes is a large, diverse order of mites, comprising around 125 families and more than 22,000 described species. The group has few synapomorphies by which it can be defined, unlike the other major group of acariform mites, Sarcoptiformes. Its members include medically important mites (such as the chiggers and scrub itch mites) and many agriculturally important species, including the spider mites (Tetranychidae) and gall mites (Eriophyidae). Trombidiformes can be divided into Sphaerolichida and Prostigmata.
1. ^ David Evans Walker (2004). "Hidden in Plain Sight: Mites in the Canopy". In Margaret Lowman, H. Bruce Rinker. Forest Canopies. Physiological Ecology Series (2nd ed.). Academic Press. pp. 224–241. ISBN 9780124575530.
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