Hypocoena basistriga
McDunnough, 1933
White-veined Sedge Moth
Hypocoena basistriga is a small noctuid with a distinctive pattern of white-veined forewings against a dark brown background. It inhabits mesic environments across western North America, from Alaska to the western Great Lakes region. The has a single with active in late summer and early fall. Larval remains undocumented, though related species are stem borers in monocots.
Pronunciation
How to pronounce Hypocoena basistriga: /hɪ.poʊˈsiː.nə bəˈsɪ.strɪ.ɡə/
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Identification
The combination of small size (2.5–2.7 cm wingspan), robust body, red-brown ground color, and prominently white cubital distinguishes this . The black basal streak and pale trailing wing edge provide additional diagnostic characters. Similar Hypocoena species lack the strongly contrasting white venation pattern.
Habitat
Mesic environments including edges of aspen bluffs, hayfields, old fields, and meadows. Associated with moist soils and shallow water where larval sedges (Cyperaceae) occur.
Distribution
Western zone of North America: Alaska, Yukon, British Columbia, Alberta, Saskatchewan, Manitoba, and western Great Lakes region. Disjunct records from Sierra Nevada, California. Not found east of the Great Lakes.
Seasonality
active mid-August through September; British Columbia records extend to early October. Single ().
Host Associations
- Cyperaceae - larval Larval inferred from related ; direct observation for H. basistriga not documented. Suggested to bore in monocot stems.
Life Cycle
Complete with one per year. Larval stage undocumented. emerge mid-to-late summer. and stage unknown.
Behavior
; attracted to light. period concentrated in late summer months.
Ecological Role
Probable stem borer in wetland and meadow monocots; specific ecological impacts unstudied. may serve as prey for .
Human Relevance
No documented economic or agricultural significance. Occasionally encountered by enthusiasts and researchers.
Similar Taxa
- Other Hypocoena speciesLack the distinctive white cubital and venation pattern; identification requires examination of wing pattern details.
More Details
Nomenclature
Originally described as Calamia basistriga by McDunnough, 1933; later transferred to Hypocoena.