Euxoa pleuritica

(Grote, 1876)

fawn brown dart

Euxoa pleuritica is a noctuid known as the fawn brown dart, found across northern North America from southern Canada through the northern United States. The is listed as a species of special concern in Connecticut. are active during summer months, with one per year. Larvae have been documented feeding on Salsola kali.

Pronunciation

How to pronounce Euxoa pleuritica: /juˈksɔ.a ˌplɛəˈrɪtɪkə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The wingspan of 34–38 mm and fawn brown coloration may help distinguish this from similar Euxoa species, though specific diagnostic features are not documented in available sources.

Appearance

Wingspan 34–38 mm.

Habitat

Found in diverse across its broad geographic range, from eastern deciduous forests to western montane and prairie regions. Specific microhabitat preferences are not well documented.

Distribution

Southern Canada (Quebec west to British Columbia, including Alberta, Manitoba, and Saskatchewan) and northern United States (eastern Massachusetts west to southern Washington). In the Rocky Mountain region, extends south to northern New Mexico, north-eastern Arizona, and central Idaho.

Seasonality

are on wing from June to August. One per year.

Diet

Larvae have been reared on Salsola kali (Russian thistle). feeding habits are not documented.

Host Associations

Salsola kali - larval food plantRussian thistle; documented through rearing

Life Cycle

One per year. stage not explicitly documented for this , though related Euxoa species typically overwinter as larvae.

Behavior

activity as . Larval not specifically documented.

Ecological Role

Larval herbivore; role in not specifically studied. As a noctuid , likely serve as prey for bats and other .

Human Relevance

Listed as a of special concern in Connecticut, indicating conservation interest. Not documented as an agricultural pest.

Similar Taxa

Euxoa auxiliarisSimilar and pattern ( vs. fawn brown dart), but E. auxiliaris has distinct with mass to alpine areas and grizzly bear ; E. pleuritica does not exhibit this
Other Euxoa species Euxoa contains numerous similar-appearing noctuid ; specific identification requires examination of genitalia or other subtle morphological features not covered in available sources

More Details

Conservation status

Listed as a of special concern in Connecticut, indicating potential vulnerability in that portion of its range

Taxonomic note

The iNaturalist entry lists this at 'section' rank with 'Fawn Brown Dart and Allies', but authoritative sources (GBIF, NCBI) confirm -level status as Euxoa pleuritica