Species Details

Euclidia cuspidea

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

Common NameToothed Somberwing SeasonalityIn Alberta adults fly in late May and June. IdentificationA medium-size (2.8-3.6 cm wingspan) broad-winged dark black-brown diurnal moth. The forewings are dark brown, with a blackish antemedian band prominently toothed on its proximal side, and a narrower post-median band with a dark triangle at its upper end. The terminal area is broadly light brown. The hindwings are black-brown, with one or two narrow faint postmedian lines and a broad orange-brown terminal band. The antennae are simple and the sexes are similar. Other Alberta grass-moths (Caenurgina sp.) are lighter grey or grey brown in color. In flight Euclidia greatly resemble skippers of the genus Erynnis; they flush from the ground and fly rapidly for 20 meters or so before dropping back to the ground.

Scientific Name Euclidia cuspidea Common Name Toothed Somberwing Habitat Grassy wooded edges, clearings and mesic meadows with long grass. Seasonality In Alberta adults fly in late May and June. Identification
A medium-size (2.8-3.6 cm wingspan) broad-winged dark black-brown diurnal moth. The forewings are dark brown, with a blackish antemedian band prominently toothed on its proximal side, and a narrower post-median band…
A medium-size (2.8-3.6 cm wingspan) broad-winged dark black-brown diurnal moth. The forewings are dark brown, with a blackish antemedian band prominently toothed on its proximal side, and a narrower post-median band with a dark triangle at its upper end. The terminal area is broadly light brown. The hindwings are black-brown, with one or two narrow faint postmedian lines and a broad orange-brown terminal band. The antennae are simple and the sexes are similar. Other Alberta grass-moths (Caenurgina sp.) are lighter grey or grey brown in color. In flight Euclidia greatly resemble skippers of the genus Erynnis; they flush from the ground and fly rapidly for 20 meters or so before dropping back to the ground.
Life History
The Toothed sombrewing is unusual in that the adults are active both during the day and the night, and are attracted to light. They also come to sugar bait (Handfield, 1999). There appears to be a single annual brood.…
The Toothed sombrewing is unusual in that the adults are active both during the day and the night, and are attracted to light. They also come to sugar bait (Handfield, 1999). There appears to be a single annual brood. The larvae are slender and cylindrical, brown with fine longitudinal striation, forming subdorsal, stigmatal and subventral bands, with the stigmatal stripe comprised of four striae and running onto the side of the head (Forbes, 1954).
Conservation A common widespread species; no concerns. Diet Info Clover (Trifolium sp.) and grasses (Graminiae) (Forbes, 1954); also reported to use sweetfern (Comptonia sp.) and lupine (Lupinus sp.) (Covell, 1984). Range
Quebec west to western Alberta, north to the Northwest Territories and south to the Gulf of Mexico. In mesic habitats throughout most of Alberta, from the Milk River to the Caribou Mountains. Cuspidea is replaced in…
Quebec west to western Alberta, north to the Northwest Territories and south to the Gulf of Mexico. In mesic habitats throughout most of Alberta, from the Milk River to the Caribou Mountains. Cuspidea is replaced in BC by the very closely related and similar appearing E. ardita.

Citation

Page Citation for Euclidia cuspidea

Page Citation

"Euclidia cuspidea, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3814. Accessed 29 Nov. 2021.

Taxonomic Hierarchy

Kingdom Animalia Phylum Arthropoda Class Hexapoda Subclass Insecta Order Lepidoptera Suborder Ditrysia Superfamily Noctuoidea Family Noctuidae Subfamily Catocalinae Genus Euclidia Species Euclidia cuspidea
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