vs

Melosira octogona compared with Melosira varians

Taxonomic Classification

Rank
Kingdom same	Chromista (Chromista)	Chromista (Chromista)
Phylum same	Ochrophyta (Ochrophyta)	Ochrophyta (Ochrophyta)
Class same	Bacillariophyceae (Bacillariophyceae)	Bacillariophyceae (Bacillariophyceae)
Order same	Melosirales (Melosirales)	Melosirales (Melosirales)
Family same	Melosiraceae	Melosiraceae
Genus same	Melosira	Melosira
Species	Melosira octogona	Melosira varians

Evolutionary Relationship

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

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 and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Norway, and Sweden.

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and South America (Brazil).

Melosira octogona is a filamentous, centric freshwater diatom forming long chains of cylindrical cells with octagonal cross-sections visible in girdle view. It inhabits benthic and planktonic zones in rivers, streams, and turbid freshwater environments across temperate regions. This photosynthetic diatom is common in riverine and turbid freshwater habitats.

Shared Countries

Both species can be found in 3 countries:

🇧🇷 Brazil 🇳🇴 Norway 🇸🇪 Sweden