Coastal Flat-body vs Seedcorn maggot

Agonopterix yeatiana compared with Delia platura

Key Differences

Coastal Flat-body is Near Threatened while Seedcorn maggot is Not Evaluated.

Taxonomic Classification

Rank	Coastal Flat-body	Seedcorn maggot
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class same	Insecta (Insects)	Insecta (Insects)
Order	Lepidoptera (Butterflies & Moths)	Diptera (Diptera)
Family	Depressariidae	Anthomyiidae
Genus	Agonopterix	Delia
Species	Agonopterix yeatiana	Delia platura

Evolutionary Relationship

Coastal Flat-body and Seedcorn maggot share a common ancestor at the Class level: Insecta. (Insects)

View Class: Insecta

Conservation Status

Coastal Flat-body

NT — Near Threatened

Seedcorn maggot

NE — Not Evaluated

Physical Characteristics

Attribute	Coastal Flat-body	Seedcorn maggot
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coastal Flat-body

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Seedcorn maggot

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and North America (United States).

Coastal Flat-body

Agonopterix yeatiana, the coastal flat-body, is a small moth in the family Depressariidae native to coastal and calcareous grassland habitats across western and northern Europe, with records from Belgium, Denmark, and Sweden. Moths in the family Depressariidae, commonly called flat-body moths due to the depressed posture they adopt when resting with wings held flat against the surface, are associated predominantly with umbellifer plants of the family Apiaceae as larval hosts. Agonopterix yeatiana larvae feed on wild carrot (Daucus carota), wild parsnip (Pastinaca sativa), and related coastal and grassland Apiaceae species, inhabiting the open, often calcareous or sandy habitats where these plants grow. Adult moths have greyish-brown forewing with a distinctive pattern of spots and dashes and reach approximately 8–12 millimeters in wingspan. The species is classified as Near Threatened by the IUCN, reflecting declines associated with the loss of traditional hay meadow management, coastal grassland degradation, and scrub encroachment that eliminates the open, flower-rich grassland habitats supporting its host plants. Agricultural intensification has reduced wild umbellifer populations significantly across lowland Europe, reducing food resources for larvae of specialist moths like A. yeatiana.