thick-lipped risso snail vs tiny risso snail

Rissoa membranacea compared with Rissoa parva

Taxonomic Classification

Rank	thick-lipped risso snail	tiny risso snail
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum same	Mollusca (mollusques)	Mollusca (mollusques)
Class same	Gastropoda (Gastropoda)	Gastropoda (Gastropoda)
Order same	Littorinimorpha (Littorinimorpha)	Littorinimorpha (Littorinimorpha)
Family same	Rissoidae	Rissoidae
Genus same	Rissoa	Rissoa
Species	Rissoa membranacea	Rissoa parva

Evolutionary Relationship

thick-lipped risso snail and tiny risso snail share a common ancestor at the Genus level: Rissoa.

Conservation Status

thick-lipped risso snail

LC — Least Concern

tiny risso snail

LC — Least Concern

Physical Characteristics

Attribute	thick-lipped risso snail	tiny risso snail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

thick-lipped risso snail

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

tiny risso snail

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden