vs

Chroomonas acuta compared with Chroomonas nordstedtii

Taxonomic Classification

Rank
Kingdom same	Chromista (クロミスタ)	Chromista (クロミスタ)
Phylum same	Cryptophyta	Cryptophyta
Class same	Cryptophyceae (クリプト藻綱)	Cryptophyceae (クリプト藻綱)
Order same	Pyrenomonadales (ピレノモナス目)	Pyrenomonadales (ピレノモナス目)
Family same	Chroomonadaceae	Chroomonadaceae
Genus same	Chroomonas	Chroomonas
Species	Chroomonas acuta	Chroomonas nordstedtii

Evolutionary Relationship

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

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 and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Norway, and Sweden.

Chroomonas acuta is a species of cryptophyte alga in the family Chroomonadaceae, found in freshwater and brackish aquatic environments. Cryptophytes are biflagellate, unicellular algae characterized by the presence of a unique organelle called the nucleomorph — a remnant nucleus from a secondary endosymbiotic event in which an ancestral flagellate engulfed a red alga. This evolutionary heritage is reflected in the distinctive combination of pigments in the plastid, including chlorophyll a, chlorophyll c, and phycobiliproteins such as phycoerythrin and phycocyanin, which give cryptophytes their often blue-green to red-brown color. Chroomonas species are small flagellates that swim using two unequal flagella arising from a ventral groove. They are important members of freshwater phytoplankton communities, particularly in the cold-water picoplankton. Chroomonas acuta has a more pointed or acute cell shape compared to some related species, as indicated by its epithet. The species has been documented from European freshwater habitats. Cryptophytes contribute to primary production in freshwater and marine ecosystems and are a significant food source for heterotrophic protists and filter-feeding zooplankton. The species has not been assessed by the IUCN.

Chroomonas nordstedtii is a species of cryptophyte alga in the family Chroomonadaceae, named after the Swedish botanist Carl Fredrik Otto Nordstedt, a prominent phycologist of the nineteenth century who made significant contributions to the study of freshwater algae and desmids. Cryptophytes in the genus Chroomonas are small, biflagellate unicells widely distributed in freshwater and brackish environments globally, contributing to planktonic diversity and primary production. They are distinguished from other flagellate algae by their unique cryptophyte plastid, nucleomorph, and ejectosomes — proteinaceous coiled structures unique to the group. Chroomonas nordstedtii has been documented from European freshwater habitats, including Scandinavian localities that were well studied by Nordic phycologists in the classical period of algal taxonomy. The species is part of the diverse microalgal flora of boreal and temperate freshwater ecosystems. Cryptophytes contribute to planktonic food webs as prey for heterotrophic protists and small metazoans, and as high-quality dietary components in zooplankton feeding experiments. The species has not been assessed under IUCN criteria.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden