Species Details

Euxoa clausa

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

SeasonalitySpecimens have been collected from mid July through mid-August. IdentificationA medium-size light yellow-buff moth with a paler costa and reduced dark markings. Dark markings consist of a dark basal dash just below the cubital vein and black filling in the space before and after the rounded orbicular spot. The AM and PM lines are lightly marked, single and scalloped. The reniform is narrowly outlined and there are a number of small dark chevrons in the subterminal area. The hindwings are unevenly shaded with light and dark brown, often with a dark median line, and with the dark scaling more extensive in females. Male antennae markedly biserrate; female simple. Clausa is a member of the idahoensis complex, and is very similar to some of the others in the group. Lafontaine (1987) provides a key to the group, although the group is known to contain several additional undescribed species in Alberta. The genitalia of both sexes are indistinguishable from those of Euxoa idahoensis. Euxoa clausa appears to have a very restricted range. It was originally described from specimens from Lethbridge.

Scientific Name Euxoa clausa Habitat Arid native shortgrass prairie. The few collection sites we have suggest it may prefer the cooler and more mesic grasslands closer to the mountains rather than the truly arid grasslands to the southeast. Seasonality Specimens have been collected from mid July through mid-August. Identification
A medium-size light yellow-buff moth with a paler costa and reduced dark markings. Dark markings consist of a dark basal dash just below the cubital vein and black filling in the space before and after the rounded…
A medium-size light yellow-buff moth with a paler costa and reduced dark markings. Dark markings consist of a dark basal dash just below the cubital vein and black filling in the space before and after the rounded orbicular spot. The AM and PM lines are lightly marked, single and scalloped. The reniform is narrowly outlined and there are a number of small dark chevrons in the subterminal area. The hindwings are unevenly shaded with light and dark brown, often with a dark median line, and with the dark scaling more extensive in females. Male antennae markedly biserrate; female simple. Clausa is a member of the idahoensis complex, and is very similar to some of the others in the group. Lafontaine (1987) provides a key to the group, although the group is known to contain several additional undescribed species in Alberta. The genitalia of both sexes are indistinguishable from those of Euxoa idahoensis. Euxoa clausa appears to have a very restricted range. It was originally described from specimens from Lethbridge.
Life History Poorly known. There is a single annual brood. The adults are nocturnal and come to light. Conservation We have not encountered this drab moth during our collecting in southern Alberta over the past 15 years, and it must be either quite local or rare. Diet Info Like most Euxoa species, the larvae are likely generalists on a variety of herbs. Range
Clausa has a rather restricted range and is known mainly from the northwestern Great Plains in southern Saskatchewan and Alberta, south to southwestern Montana and Nebraska. In Alberta it has been found in the arid…
Clausa has a rather restricted range and is known mainly from the northwestern Great Plains in southern Saskatchewan and Alberta, south to southwestern Montana and Nebraska. In Alberta it has been found in the arid grasslands region, north to the Drumheller region. It was originally described from specimens from Lethbridge.
Notes
We have not encountered this drab moth during our collecting in southern Alberta over the past 15 years, and it must be either quite local or rare. The few collection sites we have suggest it may prefer the cooler and…
We have not encountered this drab moth during our collecting in southern Alberta over the past 15 years, and it must be either quite local or rare. The few collection sites we have suggest it may prefer the cooler and more mesic grasslands closer to the mountains rather than the truly arid grasslands to the southeast.

Citation

Page Citation for Euxoa clausa

Page Citation

"Euxoa clausa, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3860. 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 clausa
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