Johnstonianidae

Subfamily Guides

Johnstonianidae is a of mites in the order Trombidiformes comprising approximately 7 and more than 20 described . The family includes genera such as Johnstoniana, Diplothrombium, and Hirstiothrombium. Members have been documented from hygric at higher altitudes, wet moss, and forest soils across parts of Europe, Turkey, Iran, and Scandinavia. includes heteromorphic instars with active postlarval forms.

Johnstonianidae by (c) RAP, いくつかの権利を保有 (CC BY), RAP によって投稿されました. Used under a CC-BY license.

Johnstonianidae by (c) Even Dankowicz, いくつかの権利を保有 (CC BY), Even Dankowicz によって投稿されました. Used under a CC-BY license.

Pronunciation

How to pronounce Johnstonianidae: //ˌdʒɒnstoʊˈniːənəˌdaɪ//

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Identification

Identification to level requires examination of morphological characters specific to Johnstonianidae within the superfamily Trombiculoidea. Larvae of at least some (e.g., Diplothrombium) can be distinguished using specialized keys. Heteromorphic instars may require matching of life stages for accurate identification.

Images

Habitat

Hygric (moist) at higher altitudes; wet moss; forest soil. Specific microhabitat varies by and .

Distribution

Documented from Turkey (Erzincan, Tunceli Provinces), Iran (Asalem area), and Scandinavia (Denmark, Norway, Sweden). Additional records from Poland and other European localities for specific .

Life Cycle

Heteromorphic instars with active postlarval forms (deutonymph, ). Larvae have been obtained in laboratory rearing from field-born females. Some collected off in soil or moss , suggesting at least partially free-living larval stages.

Behavior

Specimens of some have been collected off using extraction from soil and moss, indicating non-parasitic or facultatively free-living in certain life stages.

Similar Taxa

TrombiculidaeBoth belong to superfamily Trombiculoidea and share general trombidiform ; Johnstonianidae distinguished by specific morphological characters and traits.

More Details

Genera composition

The contains seven : Centrotrombidium, Charadracarus, Diplothrombium, Hirstiothrombium, Johnstoniana, Marcandreella, and Tetrathrombium.

Taxonomic history

Hirstiothrombium noemiae was redescribed based on all active life instars with a neotype designated from Turkey, representing the first matching of heteromorphic instars within that .