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

"Species Details - 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 30 May. 2024.

Authorship

Name Anweiler, G. G.
Role species page author
Date 2003-11-19

References

Specimen Information

There are 58 specimens of this Species.

58 results plotted on map in 20 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM17778 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1916-08-01

UASM17787 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1918-08-01

UASM17788 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1916-07-24

UASM17790 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1918-07-28

UASM17796 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1916-07-19

UASM17801 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1916-07-19

UASM17802 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1919-07-25

UASM17803 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByMackie, Donald Date Collected1916-08-03

UASM17805 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1919-07-20

UASM17807 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1916-07-19

UASM17809 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1916-07-28

UASM17810 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByMackie, Donald Date Collected1919-07-13

UASM17813 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Date Collected1916-07-19

UASM17817 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1922-07-05

UASM17818 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByBowman, K. Date Collected1917-07-17

UASM17822 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Edmonton Collected ByMackie, Donald Date Collected1919-07-14

UASM34986 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Sandy Point Recreation Area Collected ByAnweiler, G. G. Date Collected1998-07-28

UASM57338 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dunvegan Collected BySperling, F. A. H. Date Collected2003-07-18

UASM41338 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Bow Island Collected ByAnweiler, G. G. Date Collected2005-07-22

UASM111652 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Yakima county, Bethel Ridge Collected ByTroubridge, J. Date Collected1995-08-18

UASM111653 - Euxoa choris

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Yakima county, Bethel Ridge Collected ByTroubridge, J. Date Collected1995-08-18

Adult Seasonal Distribution