Ezo Naki-Usagi vs Rosette Tooth

Ochotona hyperborea compared with Hydnellum cumulatum

Key Differences

• Ezo Naki-Usagi is Least Concern while Rosette Tooth is Critically Endangered.

Taxonomic Classification

Rank	Ezo Naki-Usagi	Rosette Tooth
Kingdom	Animalia (動物)	Fungi (菌界)
Phylum	Chordata (脊索動物)	Basidiomycota (担子菌門)
Class	Mammalia (哺乳類)	Agaricomycetes (真正担子菌綱)
Order	Lagomorpha (ウサギ目)	Thelephorales (イボタケ目)
Family	Ochotonidae	Bankeraceae
Genus	Ochotona	Hydnellum
Species	Ochotona hyperborea	Hydnellum cumulatum

Conservation Status

Ezo Naki-Usagi

LC — Least Concern

Rosette Tooth

CR — Critically Endangered

Physical Characteristics

Attribute	Ezo Naki-Usagi	Rosette Tooth
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Ezo Naki-Usagi

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Rosette Tooth

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.