vs Elegant Fat-tailed Mouse Opossum

Bacidia rosella compared with Thylamys elegans

Key Differences

• is Critically Endangered while Elegant Fat-tailed Mouse Opossum is Least Concern.

Taxonomic Classification

Rank		Elegant Fat-tailed Mouse Opossum
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Chordata (Chordates)
Class	Lecanoromycetes (Lecanoromycetes)	Mammalia (Mammals)
Order	Lecanorales (Lecanorales)	Didelphimorphia (Didelphimorphia)
Family	Ramalinaceae	Didelphidae
Genus	Bacidia	Thylamys
Species	Bacidia rosella	Thylamys elegans

Conservation Status

CR — Critically Endangered

Elegant Fat-tailed Mouse Opossum

LC — Least Concern

Physical Characteristics

Attribute		Elegant Fat-tailed Mouse Opossum
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 5 distinct biome types 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.

Elegant Fat-tailed Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Bacidia rosella is a crustose lichen in the family Ramalinaceae, assessed as Critically Endangered (CR). It grows on the smooth bark of ancient trees in old-growth woodland habitats with long ecological continuity. Its critically endangered status reflects extreme rarity and the near-total loss of suitable veteran tree habitats across its range.