Arctic barrel-bubble vs Atlantic Ancula

Retusa obtusa compared with Ancula gibbosa

Taxonomic Classification

Rank	Arctic barrel-bubble	Atlantic Ancula
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class same	Gastropoda (Gastropoda)	Gastropoda (Gastropoda)
Order	Cephalaspidea (Cephalaspidea)	Nudibranchia (Nudibranchia)
Family	Retusidae	Goniodorididae
Genus	Retusa	Ancula
Species	Retusa obtusa	Ancula gibbosa

Evolutionary Relationship

Arctic barrel-bubble and Atlantic Ancula share a common ancestor at the Class level: Gastropoda. (Gastropoda)

Conservation Status

Arctic barrel-bubble

LC — Least Concern

Atlantic Ancula

LC — Least Concern

Physical Characteristics

Attribute	Arctic barrel-bubble	Atlantic Ancula
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Arctic barrel-bubble

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Atlantic Ancula

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Denmark, Norway, and Sweden.

Arctic barrel-bubble

The Arctic barrel-bubble (Retusa obtusa) is a species in the genus Retusa. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Atlantic Ancula

The Atlantic Ancula (Ancula gibbosa) is a species in the genus Ancula. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden