Crescent Map Lichen vs

Rhizocarpon lecanorinum compared with Rhizocarpon oederi

Key Differences

• Crescent Map Lichen is Least Concern while is Extinct.

Taxonomic Classification

Rank	Crescent Map Lichen
Kingdom same	Fungi (فطر)	Fungi (فطر)
Phylum same	Ascomycota (فطريات زقية)	Ascomycota (فطريات زقية)
Class same	Lecanoromycetes (لقنورانية)	Lecanoromycetes (لقنورانية)
Order same	Rhizocarpales (Rhizocarpales)	Rhizocarpales (Rhizocarpales)
Family same	Rhizocarpaceae	Rhizocarpaceae
Genus same	Rhizocarpon	Rhizocarpon
Species	Rhizocarpon lecanorinum	Rhizocarpon oederi

Evolutionary Relationship

Crescent Map Lichen and share a common ancestor at the Genus level: Rhizocarpon.

Conservation Status

Crescent Map Lichen

LC — Least Concern

EX — Extinct

Physical Characteristics

Attribute	Crescent Map Lichen
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Crescent Map Lichen

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.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Rhizocarpon oederi is a crustose lichen historically recorded on siliceous rocks across parts of Europe and North America. It is now classified as Extinct (EX) on the IUCN Red List, representing one of the few lichen species confirmed to have been lost. Its disappearance is attributed to habitat destruction, air pollution, and the very specific microhabitat requirements that made it vulnerable.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden