Species Details

Euxoa catenula

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

SeasonalityAdults have been collected in Alberta during the last week of August and the first half of September IdentificationA medium-size (3.4-3.7 cm wingspan) pale grey-white moth. The forewings are light chalky grey or tan, almost white, with a few scattered black scales. The transverse lines are reduced to a prominent black mark where each would meet the costa, with the postmedian line also indicated by a series of small spots or dashes at the veins. The orbicular spot is reduced to a few black scales or a small spot, and the reniniform is a prominent, black doubled spot. The terminal line is a series of small black triangles, and the fringe is light grey-white. The hindwings are bright white with a dark discal mark, sooty brown scales lining the veins, and a white fringe. Pale specimens of E. spumata and E. tronella lack the prominent dark spots at the costa, and are light tan, not grey. Most likely to be mistaken for Agrotis vetusta, which is larger and lacks the dark scaling at the reniform spot. There are also excellent genital characters that will separate catenula from similar species. Catenula belongs to the subgenus Euxoa. Keys to the subgenera and species of Euxoa, along with illustrations of both sexes and their genitalia, are available in Lafontaine, 1987.

Scientific Name Euxoa catenula Habitat Arid shortgrass prairie, badlands and xeric open woodland. Seasonality Adults have been collected in Alberta during the last week of August and the first half of September Identification
A medium-size (3.4-3.7 cm wingspan) pale grey-white moth. The forewings are light chalky grey or tan, almost white, with a few scattered black scales. The transverse lines are reduced to a prominent black mark where…
A medium-size (3.4-3.7 cm wingspan) pale grey-white moth. The forewings are light chalky grey or tan, almost white, with a few scattered black scales. The transverse lines are reduced to a prominent black mark where each would meet the costa, with the postmedian line also indicated by a series of small spots or dashes at the veins. The orbicular spot is reduced to a few black scales or a small spot, and the reniniform is a prominent, black doubled spot. The terminal line is a series of small black triangles, and the fringe is light grey-white. The hindwings are bright white with a dark discal mark, sooty brown scales lining the veins, and a white fringe. Pale specimens of E. spumata and E. tronella lack the prominent dark spots at the costa, and are light tan, not grey. Most likely to be mistaken for Agrotis vetusta, which is larger and lacks the dark scaling at the reniform spot. There are also excellent genital characters that will separate catenula from similar species. Catenula belongs to the subgenus Euxoa. Keys to the subgenera and species of Euxoa, along with illustrations of both sexes and their genitalia, are available in Lafontaine, 1987.
Life History There is a single brood each season, which emerges in late summer and overwinters in the egg stage. Adults are nocturnal and are attracted to light. The immature stages have not been described. Conservation An uncommon but widespread species; no concens. Diet Info
No Alberta data. Like most Euxoa, a general feeder on a variety of low plants. In Montana larvae have been collected on wheat (Tritium) , sweet clover (Meliotis), lupines (Lupinus), Russian thistle (Salsola), mustards…
No Alberta data. Like most Euxoa, a general feeder on a variety of low plants. In Montana larvae have been collected on wheat (Tritium) , sweet clover (Meliotis), lupines (Lupinus), Russian thistle (Salsola), mustards (Cruciferae), violets (Viola), and milk-vetch (Astragalus).
Range Southern Saskatchewan west to southern Vancouver Island, south to Kansas, New Mexico, Arizona and southern California. In Alberta catenula has been collected north to Calgary and Dinosaur Provincial Park.

Citation

Page Citation for Euxoa catenula

Page Citation

"Species Details - Euxoa catenula, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3858. Accessed 28 May. 2024.

Authorship

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

References

Specimen Information

There are 96 specimens of this Species.

96 results plotted on map in 35 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM17767 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Medicine Hat Collected ByBowman, K. Date Collected1942-09-05

UASM2232 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dinosaur Provincial Park Collected ByAnweiler, G. G.; Schmidt, B. C. Date Collected2000-09-08/2000-09-09

UASM2233 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected1999-09-09

UASM24407 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G. Date Collected2002-09-01/2002-09-04

UASM24575 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected1999-09-07

UASM24580 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected1999-09-07

UASM34875 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dinosaur Provincial Park Collected ByLawrie, D. Date Collected1997-08-30

UASM34979 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Writing-On-Stone Provincial Park Collected ByAnweiler, G. G.; Troubridge, J. Date Collected1999-09-09

UASM34980 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Dinosaur Provincial Park Collected ByAnweiler, G. G.; Schmidt, B. C. Date Collected2000-09-08/2000-09-09

UASM58534 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Bindloss Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-03

UASM58586 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Bindloss Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-03

UASM58802 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Taber Collected ByAnweiler, G. G. Date Collected2005-09-01

UASM58806 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Taber Collected ByAnweiler, G. G. Date Collected2005-09-01

UASM58968 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Bindloss Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-03

UASM58978 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Bindloss Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-03

UASM112557 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Skagit county, Anacortes Collected ByTroubridge, J.; Crabo, L. Date Collected2001-08-18

UASM112558 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Skagit county, Anacortes Collected ByTroubridge, J.; Crabo, L. Date Collected2001-08-18

UASM112559 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Skagit county, Anacortes Collected ByTroubridge, J.; Crabo, L. Date Collected2001-08-18

UASM112560 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Skagit county, Anacortes Collected ByTroubridge, J.; Crabo, L. Date Collected2001-08-18

UASM112561 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Skagit county, Anacortes Collected ByTroubridge, J.; Crabo, L. Date Collected2001-08-18

UASM112562 - Euxoa catenula

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Washington, Skagit county, Anacortes Collected ByTroubridge, J.; Crabo, L. Date Collected2001-08-18

Adult Seasonal Distribution