Euxoa septentrionalis

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

SeasonalityThe only Alberta specimen was collected September 8. IdentificationA medium-size (4.0 cm wingspan) dull brownish grey moth with darker grey-black markings. The forewing is crossed by doubled AM line and PM lines. The round orbicular and kidney-shaped reniform spots are lighter grey, with the area before, between and just distad of the spots filled with black. The hindwings are light grey-brown, darker toward the outer margin. Euxoa septentrionalis is most similar to E. messoria. It can usually be separated from messoria by the darker markings and by the round, not oval, orbicular spot. Questionable specimens can be readily separated by genitalic characters. Males have the right saccular extension flattened and "shovel-shaped"; in messoria it is tapered apically. Lafontaine (1987) illustrates both adults and the genitalia of both sexes.

Scientific Name Euxoa septentrionalis Habitat Dry montane. Seasonality The only Alberta specimen was collected September 8. Identification

A medium-size (4.0 cm wingspan) dull brownish grey moth with darker grey-black markings. The forewing is crossed by doubled AM line and PM lines. The round orbicular and kidney-shaped reniform spots are lighter grey, with the area before, between and just distad of the spots filled with black. The hindwings are light grey-brown, darker toward the outer margin. Euxoa septentrionalis is most similar to E. messoria. It can usually be separated from messoria by the darker markings and by the round, not oval, orbicular spot. Questionable specimens can be readily separated by genitalic characters. Males have the right saccular extension flattened and "shovel-shaped"; in messoria it is tapered apically. Lafontaine (1987) illustrates both adults and the genitalia of both sexes.

Life History Poorly known. There is a single annual brood, and adults are nocturnal and come to light. The larvae and other immature stages are unknown. Conservation Rare in Alberta, at the extreme eastern edge of its range. Diet Info There are no host data for septentrionalis, but like most Euxoa they are likely generalists on low growing herbs. Range

Western North America west of the Continental Divide, from southern BC and extreme southwestern Alberta south to California and southwestern Arizona. In Alberta it has been collected only in the Crowsnest Pass near Hillcrest. Specimens in the UASM collection labeled Lethbridge were disected and found to be misidentified.

Page Citation

"Species Details - Euxoa septentrionalis, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-4249. Accessed 20 Apr. 2024.

Authorship

Name Anweiler, G. G.

Role species page author

Date 2000-08

References

37 results plotted on map in 22 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM17385 - Euxoa septentrionalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Hillcrest Collected ByBowman, K. Date Collected1920-09-08

UASM114583 - Euxoa septentrionalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: California, Siskiyou county, Mount Shasta Collected ByTroubridge, J. Date Collected2000-08-27

UASM114584 - Euxoa septentrionalis

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Oregon, Crook county, Weberg Collected ByTroubridge, J. Date Collected1997-09-05