Brown Cobblestone Lichen vs

Acarospora fuscata compared with Chrysosphaerella longispina

Key Differences

Brown Cobblestone Lichen is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Brown Cobblestone Lichen
Kingdom	Fungi (mantar)	Chromista (Kromista)
Phylum	Ascomycota (Asklı mantarlar)	Ochrophyta (Ochrophyta)
Class	Lecanoromycetes (Lecanoromycetes)	Chrysophyceae (Altınsarısı algler)
Order	Acarosporales (Acarosporales)	Ochromonadales (Ochromonadales)
Family	Acarosporaceae	Paraphysomonadaceae
Genus	Acarospora	Chrysosphaerella
Species	Acarospora fuscata	Chrysosphaerella longispina

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Cobblestone Lichen
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.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

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.

Chrysosphaerella longispina is a colonial chrysophyte alga in the genus Chrysosphaerella, notable for the long silica spines (longispina: Latin, long spine) that project from each cell in the colony. The genus is characterized by spherical or discoid colonies of photosynthetic cells that each secrete siliceous scales and elongated spine-like appendages, making Chrysosphaerella colonies distinctively bristled and visible under light microscopy. The long spines of C. longispina likely serve as anti-predation structures that make the colonies more difficult for zooplankton to ingest. C. longispina is found in cold, oligotrophic freshwater lakes, particularly in Scandinavia, where comprehensive chrysophyte surveys have documented its presence. Chrysosphaerella colonies contribute to freshwater primary production and the cycling of biogenic silica, which upon cell dissolution is deposited in lake sediments as microscopically identifiable remains. These silica structures are widely used by paleolimnologists to reconstruct past changes in lake water chemistry, thermal stratification, and climate. The conservation status of C. longispina has not been assessed by the IUCN; the species is listed as Not Evaluated.