Amphipoea interoceanica
Smith, 1899
Interoceanic Ear Moth, Strawberry Cutworm Moth, Strawberry Cutworm
Amphipoea interoceanica is a noctuid first described by Smith in 1899. It is widely distributed across North America, occurring from coast to coast in the United States and across much of southern Canada. The species is known for its larval association with strawberry plants and other low-growing vegetation.
Pronunciation
How to pronounce Amphipoea interoceanica: //ˌæmfɪˈpiːə ˌɪntəroʊsɪˈænɪkə//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
The combination of small size (wingspan under 35 mm), dull brownish-gray coloration, and the characteristic rounded forewing shape typical of Amphipoea helps distinguish this . It is most reliably separated from by geographic distribution and genitalia examination. The specific epithet "interoceanica" refers to its transcontinental range, which can help distinguish it from more regionally restricted Amphipoea species.
Appearance
have a wingspan of 28–35 mm. The forewings are typically dull brownish or grayish with indistinct patterning. Like other members of the Amphipoea, the has a characteristic ear-shaped or rounded forewing outline. The hindwings are paler, usually light gray or whitish. The body is moderately stout with a furry .
Habitat
Found in open including meadows, fields, agricultural areas, and edges of woodlands. The is associated with areas supporting its larval plants, particularly strawberry patches and grassy wetlands.
Distribution
Transcontinental in North America. In the United States, found from the Atlantic to the Pacific coast. In Canada, recorded from Quebec west to Alberta, including Nova Scotia. Distribution records also confirm presence in Manitoba and Saskatchewan.
Seasonality
are active from July to August, with exact timing varying by location. The has a single per year.
Diet
Larvae feed on leaves, stems, and fruit stalks of Fragaria (strawberries), as well as grasses and sedges. feeding habits are not documented.
Host Associations
- Fragaria - larval food plantLeaves, stems, and fruit stalks consumed
- Poaceae - larval food plantGrasses consumed
- Cyperaceae - larval food plantSedges consumed
Life Cycle
Complete with , larva, pupa, and stages. Larvae are present during spring and early summer, feeding on plants. occurs in soil or debris. Adults emerge in mid-summer.
Behavior
are and attracted to light. Larvae are cutworms, feeding on above-ground plant parts and sometimes cutting stems.
Ecological Role
Larvae function as herbivores in grassland and agricultural . The can be a minor pest in strawberry .
Human Relevance
Considered a minor agricultural pest due to larval feeding on cultivated strawberries. The "Strawberry " reflects this economic association.
Similar Taxa
- Amphipoea americanaOverlapping range and similar appearance; requires genitalia dissection for reliable separation
- Other Amphipoea species members share rounded forewing shape and dull coloration; identification often requires examination of genitalia or geographic range data
More Details
Nomenclature
Originally described as Hydroecia interoceanica by Smith in 1899, later transferred to Amphipoea. The basionym Hydroecia interoceanica reflects its taxonomic history.
Conservation status
No conservation concerns documented; appears secure across its wide range.