vs

Coelosphaerium aerugineum compared with Coelosphaerium minutissimum

Taxonomic Classification

Rank
Kingdom same	Bacteria (Bacteria)	Bacteria (Bacteria)
Phylum same	Cyanobacteria (بكتيريا زرقاء)	Cyanobacteria (بكتيريا زرقاء)
Class same	Cyanobacteriia	Cyanobacteriia
Order same	Cyanobacteriales	Cyanobacteriales
Family same	Microcystaceae	Microcystaceae
Genus same	Coelosphaerium	Coelosphaerium
Species	Coelosphaerium aerugineum	Coelosphaerium minutissimum

Evolutionary Relationship

and share a common ancestor at the Genus level: Coelosphaerium.

Conservation Status

NE — Not Evaluated

NE — Not Evaluated

Physical Characteristics

Attribute
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Coelosphaerium aerugineum is a colonial planktonic cyanobacterium in the family Merismopediaceae, forming spherical to irregularly shaped gelatinous colonies in which individual cells are arranged in a peripheral layer surrounding a central mucilaginous matrix. Like other members of the genus, C. aerugineum is found in freshwater lakes, ponds, and slow-flowing waters of the temperate zone, including Scandinavia. Cyanobacteria are among the oldest life forms on Earth, contributing to oxygen evolution in ancient oceans, and continue to play fundamental roles in modern aquatic biogeochemistry through nitrogen fixation and primary production. Coelosphaerium species can form blooms under nutrient-enriched eutrophic conditions, although they are generally less notorious for bloom formation than genera such as Microcystis or Dolichospermum. The spherical colonial architecture provides some protection against grazing by zooplankton, while the cells contain gas vesicles that assist in vertical positioning within the water column. Distribution of Coelosphaerium aerugineum spans temperate freshwater habitats across Europe, including northern countries such as Norway and Sweden, where it occurs in lakes and reservoirs during warmer months. No formal conservation assessment has been undertaken for this species, as freshwater cyanobacteria at this taxonomic level are generally not evaluated by the IUCN.

Coelosphaerium minutissimum is a very small colonial cyanobacterium that forms hollow, spherical colonies composed of cells arranged at the periphery. It is found in freshwater plankton communities and contributes to aquatic primary production. Its conservation status is not evaluated.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden