Boreal Button Lichen vs Mentawai Squirrel

Buellia disciformis compared with Callosciurus melanogaster

Key Differences

• Boreal Button Lichen is Critically Endangered while Mentawai Squirrel is Vulnerable.

Taxonomic Classification

Rank	Boreal Button Lichen	Mentawai Squirrel
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Chordata (Chordates)
Class	Lecanoromycetes (Lecanoromycetes)	Mammalia (Mammals)
Order	Caliciales (Caliciales)	Rodentia (Rodents)
Family	Caliciaceae	Sciuridae (Squirrels)
Genus	Buellia	Callosciurus
Species	Buellia disciformis	Callosciurus melanogaster

Conservation Status

Boreal Button Lichen

CR — Critically Endangered

Mentawai Squirrel

VU — Vulnerable

Physical Characteristics

Attribute	Boreal Button Lichen	Mentawai Squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Boreal Button Lichen

Habitat

Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Mentawai Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Boreal Button Lichen

The Boreal Button Lichen (Buellia disciformis) is a species in the genus Buellia. It is currently classified as Critically Endangered on the IUCN Red List. Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.