Oulema margineimpressa
(Schaeffer, 1933)
Oulema margineimpressa is a of leaf beetle in the Chrysomelidae, Criocerinae. It was described by Schaeffer in 1933 and is known from North America. Members of the Oulema are commonly referred to as cereal leaf beetles, though specific ecological details for this species remain poorly documented.
Pronunciation
How to pronounce Oulema margineimpressa: /ˈaʊ.lə.mə ˌmɑr.dʒɪn.aɪm.ˈprɛs.ə/
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Identification
Within the Oulema, this can be recognized by the specific epithet referring to impressed (indented) marginal features on the , though precise diagnostic characters require examination of . It may be distinguished from the closely related and economically significant () by subtle differences in elytral and coloration, though these require expert verification.
Distribution
North America. Specific regional records are sparse, but the has been documented as present across the continent.
Similar Taxa
- Oulema melanopusA widespread and economically important cereal pest with which O. margineimpressa may be confused; O. melanopus has a more uniformly colored pronotum and distinct elytral .
- Oulema duftschmidiAnother in the same , potentially overlapping in range and requiring careful morphological comparison for accurate identification.
More Details
Taxonomic note
The was originally described by Schaeffer in 1933. The Oulema was historically placed in the Crioceridae but is now treated as the Criocerinae within Chrysomelidae. No observations are currently recorded in iNaturalist, suggesting this species is rarely encountered or underreported.
Data gaps
Basic biological information including larval plants, seasonal , and detailed distribution records are lacking for this . Most information about Oulema derives from studies of O. melanopus and may not apply to O. margineimpressa.