Species Details

Euxoa tronella

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

SeasonalityAdults have been collected in Alberta from mid August through early September. IdentificationEuxoa tronella are medium-sized moths (3.2-3.6 cm wingspan) with pale tan or buff forewings variably dusted with dark scales, with some specimens almost immaculate. The transverse lines are obsolete or marked with a few dark scales, and the reniform and in particular the orbicular spots are poorly defined, and are marked only by a patch of grey scales. The terminal area is usually darker grey, with a series of small dark crescents marking the terminal line. The fringe is the same color as the ground. The hindwings are white, with the outer half shaded with smoky brown in some specimens and occasionally with a discal bar and a faint median line. The fringe is white. The similar E. citricolor has pale yellow, not buff, forewings. Also similar to lightly marked specimens of E. catenula, which are white or grey, not buff, and which have prominent dark spots on the costa at the antemedian and postmedian line location. Euxoa tronella is a member of the detersa group of the subgenus Euxoa. Keys to the group, subgenus and species are available in Lafontaine 1981 and 1987.

Scientific Name Euxoa tronella Habitat Arid shortgrass prairie with sagebrush; badlands. Seasonality Adults have been collected in Alberta from mid August through early September. Identification
Euxoa tronella are medium-sized moths (3.2-3.6 cm wingspan) with pale tan or buff forewings variably dusted with dark scales, with some specimens almost immaculate. The transverse lines are obsolete or marked with a…
Euxoa tronella are medium-sized moths (3.2-3.6 cm wingspan) with pale tan or buff forewings variably dusted with dark scales, with some specimens almost immaculate. The transverse lines are obsolete or marked with a few dark scales, and the reniform and in particular the orbicular spots are poorly defined, and are marked only by a patch of grey scales. The terminal area is usually darker grey, with a series of small dark crescents marking the terminal line. The fringe is the same color as the ground. The hindwings are white, with the outer half shaded with smoky brown in some specimens and occasionally with a discal bar and a faint median line. The fringe is white. The similar E. citricolor has pale yellow, not buff, forewings. Also similar to lightly marked specimens of E. catenula, which are white or grey, not buff, and which have prominent dark spots on the costa at the antemedian and postmedian line location. Euxoa tronella is a member of the detersa group of the subgenus Euxoa. Keys to the group, subgenus and species are available in Lafontaine 1981 and 1987.
Life History There is a single brood, flying in late summer and early fall. Adults come to light. Conservation A rare species in Canada where it is at the northern extremity of its range. Diet Info No information available. Range
From western North and South Dakota, west across southern Saskatchewan and southeastern Alberta to Washington, south to southern California and northern New Mexico. In Alberta it has been collected in the arid…
From western North and South Dakota, west across southern Saskatchewan and southeastern Alberta to Washington, south to southern California and northern New Mexico. In Alberta it has been collected in the arid grasslands region, north to Tolman Bridge Recreation Area in the Red Deer River valley.

Citation

Page Citation for Euxoa tronella

Page Citation

"Species Details - Euxoa tronella, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2369. Accessed 16 Jun. 2024.

References

Specimen Information

There are 53 specimens of this Species.

53 results plotted on map in 19 markers.
Note: Only records with latitude and longitude coordinates are plotted on map.

UASM17881 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Lethbridge Collected ByBowman, K. Date Collected1924-09-01

UASM24581 - Euxoa tronella

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

UASM34860 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Tolman Bridge Provincial Recreational Area Collected ByMengersen, E. Date Collected2001-08-23/2001-08-24

UASM59101 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Onefour Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-02

UASM59106 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Onefour Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-02

UASM59107 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Onefour Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-02

UASM59108 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedCanada: Alberta, Onefour Collected ByAnweiler, G. G.; Troubridge, J. Date Collected2005-09-02

UASM111125 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111126 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111127 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111128 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111129 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111130 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111131 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111132 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111133 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Nevada, Humboldt county, Winnemucca Mountain Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-20

UASM111134 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Oregon, Lake county, Alkali Lake Collected ByTroubridge, J. Date Collected1998-09-14

UASM111135 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Oregon, Lake county, Alkali Lake Collected ByTroubridge, J. Date Collected1998-09-14

UASM111136 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Oregon, Lake county, Alkali Lake Collected ByTroubridge, J. Date Collected1998-09-14

UASM111137 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Oregon, Lake county, Alkali Lake Collected ByTroubridge, J. Date Collected1998-09-14

UASM111138 - Euxoa tronella

University of Alberta E.H. Strickland Entomological Museum

Place CollectedUnited States: Oregon, Baker county, Burnt River Canyon Collected ByTroubridge, J.; Crabo, L. Date Collected2001-09-19

Adult Seasonal Distribution