Definition of Acari in English:

Acari

(also Acarina)

proper noun

Zoology
  • A large order (or subclass) of small arachnids that comprises the mites and ticks. They are distinguished by an apparent lack of body divisions.

    • ‘Among the 11 extant orders of arachnids, Araneae and Acari (ticks and mites) are by far the most species rich.’
    • ‘Over 45,000 arthropods were collected from 55 plants (5 plants from each of 11 sites), dominated numerically by Acari and Thysanoptera.’
    • ‘The examination of 278 hosts of 16 species yielded 11,030 ectoparasites representing six families of Insecta and eleven families of Acari.’
    • ‘The second most common taxon was Acarina, which was most common in pond-side arrays.’
    • ‘Many other members of the Acari are microscopic, like this unidentified mite photographed with UCMP's Environmental Scanning Electron Microscope.’
    • ‘For example, red velvet mites, which can be up to 0.4 inches long - among the giants of the Acari - can be seen hunting on the ground or on tree trunks.’
    • ‘The samples were dominated numerically by the Thysanoptera and Acari, accounting for over 90% of the arthropods from both leaf and stalk material.’
    • ‘The Acari (mites and ticks) are closest related to the Ricinulei or the ‘hooded-tickspiders,’ a group of nontoxic arachnids.’
    • ‘Nothing is known about gene order in other lineages of Acari.’
    • ‘Parthenogenesis-inducing Wolbachia are restricted to species with haplodiploid sex determination, as occurs in the arthropod groups of Hymenoptera, Thysanoptera, Coleoptera, and Acari.’
    • ‘The Chelicerates include among their number both the tiniest (the microscopic Acari or mites) and the hugest (the giant Paleozoic Eurypterida) of all the Arthropoda.’
    • ‘In addition to Diptera, CI has since been found to be a Wolbachia-induced trait in a wide diversity of arthropod orders, including Acarina, Coleoptera, Homoptera, Hymenoptera, Isoptera, Lepidoptera, and Orthoptera.’
    • ‘The communities were dominated numerically by Thysanoptera (leaves and stalks) and Acari, but other taxa including Heteroptera and Coleoptera were also relatively common.’
    • ‘Botfly larvae often attack nestlings as do other nest parasites (Hemiptera, Psammolestes, Triatoma and Acarina).’

Origin

Modern Latin (plural), from acarus, from Greek akari mite.

Pronunciation:

Acari

/ˈakəˌrī/