Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
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Subclass Acari - Mites and Ticks

Another Tick sp - Dermacentor variabilis - male red mite eating - Anystis Zetzellia mali Tick  Tick 3  3 of 3  Tick with human tissue on stylus - Ixodes furry galls on oak - Aceria triplacis Mite infesting Drosophilia, anterior - Tyrophagus Erythraeidae - Callidosoma Eriophyes mackiei? - Aceria mackiei
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Subclass Acari (Mites and Ticks)
Synonyms and other taxonomic changes
Taxonomy follows(1)
ca. 50,000 described spp. worldwide (many times as many undescribed)
Six-legged condition: Acarine larvae normally have 6 legs rather than 8, unless that feature has been lost secondarily. Some mites may have no legs at all at some life stages. This condition doesn't follow a particular taxonomic pattern, but is based more on species or life-stage ecology. Parasitic or phoretic mites, in particular, may lack some or even all legs. Some adult mites have 6 legs (one pair lost secondarily), e.g., in Metacheyletia spp. the hind legs are reduced or absent. (Jon Oliver's comments)
Internet References
MiteSite. USDA, last update 2010
Bee Mites. University of Michigan