Species Details

Euxoa westermanni

University of Alberta E.H. Strickland Entomological Museum Read more about this collection »

SeasonalityAlberta specimens have been collected from mid-July through the first week of August. IdentificationEuxoa westermanni is a medium-size Euxoa (FW length 15-17 mm) with dark red-brown, almost black, forewings with the basal two-thirds o the costa and the large orbicular and reniform spots contrasting pale rusty yellow-orange. The hindwings are sooty brown. The light rusty-orange center in the dark red-brown thorax is diagnostic. Euxoa westermanni is superficially most like E. castanea and E. idahoensis. In addition to genitalic differences it can be separated from castanea by the darker ground and the chestnut thorax, and from idahoensis by the smaller, less contrasting spots and the chestnut thorax.

Scientific Name Euxoa westermanni Seasonality Alberta specimens have been collected from mid-July through the first week of August. Identification
Euxoa westermanni is a medium-size Euxoa (FW length 15-17 mm) with dark red-brown, almost black, forewings with the basal two-thirds o the costa and the large orbicular and reniform spots contrasting pale rusty…
Euxoa westermanni is a medium-size Euxoa (FW length 15-17 mm) with dark red-brown, almost black, forewings with the basal two-thirds o the costa and the large orbicular and reniform spots contrasting pale rusty yellow-orange. The hindwings are sooty brown. The light rusty-orange center in the dark red-brown thorax is diagnostic. Euxoa westermanni is superficially most like E. castanea and E. idahoensis. In addition to genitalic differences it can be separated from castanea by the darker ground and the chestnut thorax, and from idahoensis by the smaller, less contrasting spots and the chestnut thorax.
Life History Poorly known. There is a single annual brood, with adults flying in mid-summer. Adults are nocturnal and come to light. The larvae are unknown. Conservation A rather uncommon and local species, but no obvious reasons for concern. Diet Info Like most Euxoa species, the larvae are likely generalists on a variety of herbs. Range
Euxoa westermanni has a northern distribution, ranging from southern Greenland and eastern Labrador west to Great Slave Lake and central Yukon, south in the Rocky Mountains to Lake Louise, and to near Calling Lake in…
Euxoa westermanni has a northern distribution, ranging from southern Greenland and eastern Labrador west to Great Slave Lake and central Yukon, south in the Rocky Mountains to Lake Louise, and to near Calling Lake in the boreal forest of central Alberta.
Euxoa westermanni
Euxoa westermanni

Citation

Page Citation for Euxoa westermanni

Page Citation

"Euxoa westermanni, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3877. Accessed 20 Jun. 2021.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Noctuoidea Family Noctuidae Subfamily Noctuinae Genus Euxoa Species Euxoa westermanni
This hierarchy is created from our museum records, it may not always accurately reflect modern taxonomies.

Taxonomic Hierarchy for University of Alberta E.H. Strickland Entomological Museum