Giant Otter vs robust shell

Pteronura brasiliensis compared with Littoraria undulata

Key Differences

• Giant Otter is Endangered while robust shell is Least Concern.

Taxonomic Classification

Rank	Giant Otter	robust shell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Gastropoda (Gastropoda)
Order	Carnivora (Carnivorans)	Littorinimorpha (Littorinimorpha)
Family	Mustelidae (Weasels & Otters)	Littorinidae
Genus	Pteronura	Littoraria
Species	Pteronura brasiliensis	Littoraria undulata

Evolutionary Relationship

Giant Otter and robust shell share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Giant Otter

EN — Endangered

robust shell

LC — Least Concern

Physical Characteristics

Attribute	Giant Otter	robust shell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Giant Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

robust shell

Habitat

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

Range

Found in Taiwan.