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Ciidae and gamaside mite?

(Gamasoidea), a group of mites of the order Parasitiformes. There are about 20 families. Gamasid mites have oval or elongated thoraxes (0.3-4 mm) covered with corselets. (A mite may have a single or divided dorsal and several ventral segments.) The body has many bristles, which are constant in number and position. The legs are six-jointed, with claws and suckers. The mouth organs are designed for bitting or puncturing and sucking. The chelicerae have pincers or are needle-shaped, and they project from tubular foundations, which are the fused coxa of the legs. The mites breathe through trachea, which open through spiracles on the sides of the body. Gamasid mites lay eggs, but many are viviparous.

Gamaside on Sexton Beetle (Nicrophorus humator)

Many hirsutellan species exhibit host specifi city to arthropod orders (Aoki 2003). Hirsutella rostrata, which phylogenetically and morphologically resembles H. proturicola, is isolated from various gamasid mites living under bark and in anthills and a predacious coleopteran larva (Ciidae?), but it did not infect larvae of Scolytus ratzeburgi Jans. (Coleoptera) and Cydia pomonella L. (Lepidoptera) and Globodera rostochiensis Wollenweber (Nematoda) by an artifi cial infection treatment (Balazy et al. 2008). Infection tests of H. proturicola to other arthropods including Gamasida are required to clarify the host ranges of the species.

Gamasid (Gamasus) on Nicrophorus investigator Zetterstedt, 1824



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