Coastal Flat-body vs Least Crayfish

Agonopterix yeatiana compared with Cambarellus diminutus

Key Differences

• Coastal Flat-body is Near Threatened while Least Crayfish is Data Deficient.

Taxonomic Classification

Rank	Coastal Flat-body	Least Crayfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class	Insecta (Insects)	Malacostraca (Crustaceans)
Order	Lepidoptera (Butterflies & Moths)	Decapoda (Decapoda)
Family	Depressariidae	Cambaridae
Genus	Agonopterix	Cambarellus
Species	Agonopterix yeatiana	Cambarellus diminutus

Evolutionary Relationship

Coastal Flat-body and Least Crayfish share a common ancestor at the Phylum level: Arthropoda. (Arthropods)

Conservation Status

Coastal Flat-body

NT — Near Threatened

Least Crayfish

DD — Data Deficient

Physical Characteristics

Attribute	Coastal Flat-body	Least Crayfish
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.

Least Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Found in Norway.

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.