Cheiroseius

Berlese, 1916

Cheiroseius is a of predatory mites in the Blattisociidae (formerly placed in Ascidae), representing the second largest genus in this family. The genus contains approximately 80 described distributed across multiple continents. Species have been documented from wet including leaf litter and aquatic vegetation, with some species associated with mosquito larvae.

Pronunciation

How to pronounce Cheiroseius: /ˌkaɪroʊˈsiːəs/

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Identification

Cheiroseius are distinguished from other Blattisociidae by a combination of morphological features including cheliceral structure and setal patterns on the idiosoma. Identification to species level requires examination of females, with particular attention to shield chaetotaxy, shield , and leg setation. The may be separated from similar ascid genera by the form of the and the arrangement of sternal setae.

Habitat

Wet including leaf litter and standing water environments. One Brazilian , C. luizgonzagai, has been collected from Salvinia sp., a floating aquatic plant. Species commonly occur in moist microhabitats alongside other organisms.

Distribution

Documented from North America (including Texas and Tennessee), South America (Brazil), Europe, Asia (including China, Japan, Nepal), and Africa (South Africa). Distribution records indicate a broad geographic range across multiple biogeographic regions.

Host Associations

mosquito larvae - associated with occur commonly in wet together with mosquito larvae; ecological relationship not specified

Similar Taxa

BlattisociusBoth belong to Blattisociidae and share general mesostigmatid body plan; Cheiroseius distinguished by cheliceral and setal characters
AscaFormerly classified together in Ascidae; separated based on revised concepts and morphological differences in shield structure

More Details

Taxonomic history

Cheiroseius was historically placed in Ascidae, but modern classifications assign it to Blattisociidae. This reclassification reflects revised understanding of relationships within the superfamily Phytoseioidea.

Species diversity

With approximately 80 described , Cheiroseius represents substantial diversity within Blattisociidae. New species continue to be described, including recent additions from Brazil and Texas.