Ochlerotatus dorsalis

(Meigen, 1830)

Salt Marsh Mosquito

Ochlerotatus dorsalis is a Holarctic mosquito with a transcontinental distribution spanning the Palearctic and Nearctic regions. Genetic studies have identified two highly distinctive COI mtDNA phylogroups corresponding to these regions, suggesting Pleistocene vicariance of an ancestral range due to geographical barriers and climatic changes. The species is epidemiologically relevant as a potential .

Pronunciation

How to pronounce Ochlerotatus dorsalis: /ˌɒklɛroʊˈteɪtəs dɔːrˈsælɪs/

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Identification

Can be distinguished from the related Palearctic Ochlerotatus caspius through integrative taxonomic approaches combining COI mtDNA (which reliably separates the two species), ITS2 rDNA, and morphological analysis of larvae and . The two species show differential diagnostic value in larval and adult phenotypic traits.

Habitat

Associated with salt marsh environments and standing water sources. Larvae develop in aquatic including standing water in containers, rain barrels, pools, and natural water bodies.

Distribution

Holarctic: present in Europe and Northern Asia (excluding China), North America, and Southern Asia. Records include the Belgian Exclusive Economic Zone and Denmark. The comprises two major phylogeographic lineages: Palearctic and Nearctic.

Seasonality

activity observed in July in Colorado.

Diet

Females are blood-feeders, requiring protein from blood meals for development. Males feed on from nectar.

Life Cycle

Complete with , larval, pupal, and stages. Larvae are aquatic and develop in standing water. Females require blood meals to produce eggs.

Behavior

Females bite humans for blood meals. attracted to blacklights at night. Poor in breezy conditions.

Ecological Role

Potential for human . Females function as blood-feeding on vertebrates, while males and non-blood-feeding may contribute to pollination through nectar feeding.

Human Relevance

Nuisance pest due to biting . Public health significance as a potential . Control methods include eliminating standing water breeding sites and use of repellents.

Similar Taxa

  • Ochlerotatus caspiusClosely related Palearctic requiring integrative taxonomic approaches for reliable separation; distinguished by COI mtDNA and morphological traits of larvae and
  • Aedes scapularisMember of the same Ochlerotatus Group of mosquitoes, though geographically distinct in distribution

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