beaded chestnut vs St. James' shell

Agrochola lychnidis compared with Pecten maximus

Key Differences

• beaded chestnut is Near Threatened while St. James' shell is Least Concern.

Taxonomic Classification

Rank	beaded chestnut	St. James' shell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Lepidoptera (Butterflies & Moths)	Pectinida (Pectinida)
Family	Noctuidae	Pectinidae
Genus	Agrochola	Pecten
Species	Agrochola lychnidis	Pecten maximus

Evolutionary Relationship

beaded chestnut and St. James' shell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

beaded chestnut

NT — Near Threatened

St. James' shell

LC — Least Concern

Physical Characteristics

Attribute	beaded chestnut	St. James' shell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

beaded chestnut

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

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

St. James' shell

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (China), Europe (8 countries), and South America (Chile).

beaded chestnut

The Beaded chestnut (Agrochola lychnidis) is a species in the genus Agrochola. It is currently classified as Near Threatened on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

St. James' shell

St. James' shell (Pecten maximus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden