Bent Ring Lichen vs Coastal Mushoom

Arctoparmelia incurva compared with Agaricus litoralis

Key Differences

• Bent Ring Lichen is Critically Endangered while Coastal Mushoom is Least Concern.

Taxonomic Classification

Rank	Bent Ring Lichen	Coastal Mushoom
Kingdom same	Fungi (菌界)	Fungi (菌界)
Phylum	Ascomycota (子嚢菌門)	Basidiomycota (担子菌門)
Class	Lecanoromycetes (チャシブゴケ菌綱)	Agaricomycetes (真正担子菌綱)
Order	Lecanorales (チャシブゴケ目)	Agaricales (ハラタケ目)
Family	Parmeliaceae	Agaricaceae (Agarics)
Genus	Arctoparmelia	Agaricus (Button Mushrooms)
Species	Arctoparmelia incurva	Agaricus litoralis

Evolutionary Relationship

Bent Ring Lichen and Coastal Mushoom share a common ancestor at the Kingdom level: Fungi. (菌界)

Conservation Status

Bent Ring Lichen

CR — Critically Endangered

Coastal Mushoom

LC — Least Concern

Physical Characteristics

Attribute	Bent Ring Lichen	Coastal Mushoom
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bent Ring Lichen

Habitat

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

Range

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

Coastal Mushoom

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Bent Ring Lichen

The Bent Ring Lichen (Arctoparmelia incurva) is a species in the genus Arctoparmelia. It is currently classified as Critically Endangered on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Coastal Mushoom

Agaricus litoralis, the coastal mushroom, is a saprotrophic agaric fungus in the family Agaricaceae occurring in sand dunes, coastal grassland, and sandy soil habitats along the coasts of northwestern Europe, with confirmed records from Belgium, Denmark, Norway, and Sweden. The genus Agaricus contains the familiar cultivated button mushroom (A. bisporus) along with hundreds of wild species, and members are characterized by a ring on the stem and browning, discoloring, or non-discoloring flesh when cut, features used in field identification. Agaricus litoralis is a medium-sized mushroom producing white to cream-colored caps 4–10 centimeters across with pinkish then dark brown gills and a stout stem with a double ring, fruiting in sand dune hollows and the grassy margins of coastal habitats from summer through autumn. The specific epithet litoralis refers directly to its coastal habitat preference. As a saprotroph, it decomposes organic matter in the sandy soil substrate, releasing nutrients back into the ecosystem. The species is classified as Least Concern by the IUCN, being relatively widespread in suitable coastal sandy habitat across northwestern Europe. Like many coastal fungi, it is specifically adapted to the nutrient-poor, well-drained, alkaline conditions of stabilized sand dune systems.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden