Brown Cobblestone Lichen vs limestone fern

Acarospora fuscata compared with Gymnocarpium robertianum

Key Differences

Brown Cobblestone Lichen is Least Concern while limestone fern is Critically Endangered.

Taxonomic Classification

Rank	Brown Cobblestone Lichen	limestone fern
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Ascomycota (Sac Fungi)	Tracheophyta
Class	Lecanoromycetes (Lecanoromycetes)	Polypodiopsida (Polypodiopsida)
Order	Acarosporales (Acarosporales)	Polypodiales (Polypodiales)
Family	Acarosporaceae	Cystopteridaceae
Genus	Acarospora	Gymnocarpium
Species	Acarospora fuscata	Gymnocarpium robertianum

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

limestone fern

CR — Critically Endangered

Physical Characteristics

Attribute	Brown Cobblestone Lichen	limestone fern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Cobblestone Lichen

Habitat

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

Range

Distributed across Denmark, Norway, Portugal, and United States.

limestone fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

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

Brown Cobblestone Lichen

The Brown Cobblestone Lichen (Acarospora fuscata) is a species in the genus Acarospora. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.