Species Details

Euxoa choris

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

SeasonalityAdults have been collected in Alberta from the end of June through early August. IdentificationA relatively large Euxoa (4.1-4.3 cm wingspan) with light brown or grey-brown forewings with obscure markings. The transverse lines are very faintly marked, with the veins distad of the postmedian line lightly lined with dark scales. The reniform is a diffuse patch of grey scales, partially narrowly outlined by dark scales, mainly on the side adjacent to the orbicular. The orbicular is oval shaped but drawn to a point toward the reniform. It has a thin dark border and is filled with the same color forewing ground. The terminal line is a series of small dark triangles, and the fringe is concolorous with the rest of the wing. The hind wings are light smoky brown, darker toward the margin and in females. The genitalia are very distinct, with a prominent cornutus near the base and long, heavy symmetrical saccular extensions that curl around the ends of the valves. Similar brown Euxoa i.e. E. messoria differ in lacking the black basal dash and in having a doubled postmedian line (single in choris), as well as genitalic differences. E. choris belongs to the choris group in the subgenus Euxoa. Keys to the subgenera, species groups and species are provided in Lafontaine, 1987.

Scientific Name Euxoa choris Habitat Mainly dry coniferous forest; dry wooded riparian areas in the parklands and grasslands. Seasonality Adults have been collected in Alberta from the end of June through early August. Identification
A relatively large Euxoa (4.1-4.3 cm wingspan) with light brown or grey-brown forewings with obscure markings. The transverse lines are very faintly marked, with the veins distad of the postmedian line lightly lined…
A relatively large Euxoa (4.1-4.3 cm wingspan) with light brown or grey-brown forewings with obscure markings. The transverse lines are very faintly marked, with the veins distad of the postmedian line lightly lined with dark scales. The reniform is a diffuse patch of grey scales, partially narrowly outlined by dark scales, mainly on the side adjacent to the orbicular. The orbicular is oval shaped but drawn to a point toward the reniform. It has a thin dark border and is filled with the same color forewing ground. The terminal line is a series of small dark triangles, and the fringe is concolorous with the rest of the wing. The hind wings are light smoky brown, darker toward the margin and in females. The genitalia are very distinct, with a prominent cornutus near the base and long, heavy symmetrical saccular extensions that curl around the ends of the valves. Similar brown Euxoa i.e. E. messoria differ in lacking the black basal dash and in having a doubled postmedian line (single in choris), as well as genitalic differences. E. choris belongs to the choris group in the subgenus Euxoa. Keys to the subgenera, species groups and species are provided in Lafontaine, 1987.
Life History Poorly known. There is a single annual brood with adults in late summer. The immature stages are unknown. Conservation A widespread but uncommon species; no concerns Diet Info No information available. Range
Southwestern Saskatchewan, central Alberta and south-central Yukon, south to New Mexico, Arizona and California. In Alberta it has been collected from the Milk and Red Deer River valleys east to the Empress area,…
Southwestern Saskatchewan, central Alberta and south-central Yukon, south to New Mexico, Arizona and California. In Alberta it has been collected from the Milk and Red Deer River valleys east to the Empress area, north to the southern boreal forest at Edmonton and in the mountains at Jasper.

Citation

Page Citation for Euxoa choris

Page Citation

"Euxoa choris, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3859. Accessed 21 Jan. 2022.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Noctuoidea Family Noctuidae Subfamily Noctuinae Genus Euxoa Species Euxoa choris
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