Andersson's arctic moss vs St. James' shell

Arctoa anderssonii compared with Pecten maximus

Key Differences

Andersson's arctic moss is Endangered while St. James' shell is Least Concern.

Taxonomic Classification

Rank	Andersson's arctic moss	St. James' shell
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Bryophyta	Mollusca (Mollusks)
Class	Bryopsida (Bryopsida)	Bivalvia (Bivalvia)
Order	Dicranales (Dicranales)	Pectinida (Pectinida)
Family	Rhabdoweisiaceae	Pectinidae
Genus	Arctoa	Pecten
Species	Arctoa anderssonii	Pecten maximus

Conservation Status

Andersson's arctic moss

EN — Endangered

St. James' shell

LC — Least Concern

Physical Characteristics

Attribute	Andersson's arctic moss	St. James' shell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Andersson's arctic moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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).

Andersson's arctic moss

The Andersson's arctic moss (Arctoa anderssonii) is a species in the genus Arctoa. It is currently classified as Endangered on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

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.