Suborder of Acarina.
Mites belong to the order Acarina within the phylum Arthropoda (subphylum Chelicerata) and include about 30,000 species in a worldwide distribution. While fed, ticks can reach a length of up to 30 mm, but mites are relatively small arthropods with a body length of 0.2–4 mm. In contrast to ticks, mites often possess relatively long hairs (Neotrombicula autumnalis, Fig. 1).
The shape of the body, as well as of the extremities and mouthparts, may differ considerably between the different groups of mites. In general, the chelicerae are adapted to piercing, sucking, or chewing. In members of the Acarina, the prosoma and opisthosoma are fused, forming a more or less rounded body (Acarina, Fig. 1). If present, eyes are on the surface of the prosoma. The exoskeleton, which contains chitin, can be more or less sclerotized; there are species with soft skin, while the body of others can be covered by sclerotized shields...