Cottontail Foam Lichen vs Woolly Foam

Stereocaulon paschale compared with Stereocaulon tomentosum

Key Differences

• Cottontail Foam Lichen is Critically Endangered while Woolly Foam is Endangered.

Taxonomic Classification

Rank	Cottontail Foam Lichen	Woolly Foam
Kingdom same	Fungi (Pilze)	Fungi (Pilze)
Phylum same	Ascomycota (Schlauchpilze)	Ascomycota (Schlauchpilze)
Class same	Lecanoromycetes (Lecanoromycetes)	Lecanoromycetes (Lecanoromycetes)
Order same	Lecanorales (Lecanorales)	Lecanorales (Lecanorales)
Family same	Stereocaulaceae	Stereocaulaceae
Genus same	Stereocaulon	Stereocaulon
Species	Stereocaulon paschale	Stereocaulon tomentosum

Evolutionary Relationship

Cottontail Foam Lichen and Woolly Foam share a common ancestor at the Genus level: Stereocaulon.

Conservation Status

Cottontail Foam Lichen

CR — Critically Endangered

Woolly Foam

EN — Endangered

Physical Characteristics

Attribute	Cottontail Foam Lichen	Woolly Foam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cottontail Foam Lichen

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

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.

Woolly Foam

Habitat

Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region.

Range

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

Shared Countries

Both species can be found in 4 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States