Brook Alder vs thick-lipped risso snail

Alnus maritima compared with Rissoa membranacea

Key Differences

• Brook Alder is Endangered while thick-lipped risso snail is Least Concern.

Taxonomic Classification

Rank	Brook Alder	thick-lipped risso snail
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Mollusca (Mollusks)
Class	Magnoliopsida (Dicots)	Gastropoda (Gastropoda)
Order	Fagales (Beeches & Oaks)	Littorinimorpha (Littorinimorpha)
Family	Betulaceae	Rissoidae
Genus	Alnus	Rissoa
Species	Alnus maritima	Rissoa membranacea

Conservation Status

Brook Alder

EN — Endangered

thick-lipped risso snail

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Brook Alder

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Belgium, France, Netherlands, and United Kingdom. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

thick-lipped risso snail

Habitat

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

Range

Distributed across Denmark, Norway, and Sweden.

Brook Alder

The Brook Alder (Alnus maritima) is a species in the genus Alnus. It is currently classified as Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.