Bemaraha Woolly Lemur vs common river snail

Avahi cleesei compared with Viviparus viviparus

Key Differences

• Bemaraha Woolly Lemur is Critically Endangered while common river snail is Least Concern.

Taxonomic Classification

Rank	Bemaraha Woolly Lemur	common river snail
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Gastropoda (Gastropoda)
Order	Primates (Primates)	Architaenioglossa (Architaenioglossa)
Family	Indriidae	Viviparidae
Genus	Avahi	Viviparus
Species	Avahi cleesei	Viviparus viviparus

Evolutionary Relationship

Bemaraha Woolly Lemur and common river snail share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Bemaraha Woolly Lemur

CR — Critically Endangered

common river snail

LC — Least Concern

Physical Characteristics

Attribute	Bemaraha Woolly Lemur	common river snail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bemaraha Woolly Lemur

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

common river snail

Habitat

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

Range

Found across Europe (7 countries).

Bemaraha Woolly Lemur

The Bemaraha Woolly Lemur (Avahi cleesei) is a species in the genus Avahi. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

common river snail

<em>Viviparus viviparus</em>, the common river snail, is a freshwater gastropod mollusk in the family Viviparidae, order Architaenioglossa. It is distributed across Europe, with populations documented in Austria, Belgium, Bulgaria, Czech Republic, France, Germany, and Hungary, among other countries, typically inhabiting slow-moving and still freshwater bodies including rivers, canals, ponds, and ditches. The species is assessed as Least Concern on the IUCN Red List. Common river snails typically live in soft-sediment benthic habitats, grazing on algae, aquatic plant material, and organic detritus using a radula — a ribbon-like feeding organ characteristic of gastropods. <em>Viviparus viviparus</em> is notable among freshwater mollusks for being viviparous, giving birth to fully formed juvenile snails rather than laying eggs, an adaptation reflected in both the genus and family names. This reproductive strategy typically results in small litter sizes but high juvenile survival compared to egg-laying mollusks. The species plays a role in benthic nutrient cycling and serves as prey for waterfowl, fish, and crayfish. Biological traits such as precise lifespan, body measurements, and population density data vary across localities and remain incompletely documented in comprehensive studies.