Idia immaculalis
Hulst, 1886
Immaculate Idia Moth
Idia immaculalis is a litter moth in the Erebidae, first described by George Duryea Hulst in 1886. It is known from western North America, with records from California north and east across Montana to southern Alberta and Saskatchewan. have a wingspan of 35–39 mm and are active from June to August. The belongs to the Herminiinae, a group commonly referred to as litter moths due to their association with decaying plant material.
Pronunciation
How to pronounce Idia immaculalis: /ˈɪ.di.ə ɪˌmæk.juˈleɪ.lɪs/
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Identification
Distinguished from , particularly Idia aemula and Idia lubricalis, by the absence of dark spots or prominent markings on the forewings. Most Idia exhibit contrasting dark and light patterning, making the relatively unmarked wings of I. immaculalis distinctive. Genitalia examination may be required for definitive identification where ranges overlap.
Appearance
have a wingspan of 35–39 mm. As the suggests, the lacks the dark spots or markings typical of many related Idia species, presenting a relatively plain appearance.
Distribution
Western North America: recorded from California, north and east across Montana to southern Alberta and southern Saskatchewan in Canada.
Seasonality
are on wing from June to August.
Behavior
have been observed at blacklight, indicating activity. As a member of Herminiinae, larvae likely feed on decaying organic matter, though this has not been directly documented for this .
Similar Taxa
- Idia aemulaOverlapping range and similar size, but I. aemula has distinct dark spots on forewings
- Idia lubricalisOverlapping range, but I. lubricalis has contrasting dark and light wing patterning
More Details
Taxonomic History
Originally described as Botis immaculalis by Hulst in 1886, later transferred to Idia.