Atlantic Ancula vs cavernous crystalwort

Ancula gibbosa compared with Riccia cavernosa

Key Differences

• Atlantic Ancula is Least Concern while cavernous crystalwort is Endangered.

Taxonomic Classification

Rank	Atlantic Ancula	cavernous crystalwort
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Marchantiophyta (liverwort)
Class	Gastropoda (Gastropoda)	Marchantiopsida (Marchantiopsida)
Order	Nudibranchia (Nudibranchia)	Marchantiales (Marchantiales)
Family	Goniodorididae	Ricciaceae
Genus	Ancula	Riccia
Species	Ancula gibbosa	Riccia cavernosa

Conservation Status

Atlantic Ancula

LC — Least Concern

cavernous crystalwort

EN — Endangered

Physical Characteristics

Attribute	Atlantic Ancula	cavernous crystalwort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Atlantic Ancula

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

cavernous crystalwort

Habitat

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

Range

Widely distributed across Europe (6 countries), North America (United States), and South America (Brazil). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

cavernous crystalwort

The Cavernous crystalwort (Riccia cavernosa) is a species in the genus Riccia. It is currently classified as Endangered on the IUCN Red List. Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden