Coccolithophorid vs

Hymenomonas roseola compared with Hymenomonas coronata

Taxonomic Classification

Rank	Coccolithophorid
Kingdom same	Chromista (โครมิสตา)	Chromista (โครมิสตา)
Phylum same	Haptophyta (Haptophyta)	Haptophyta (Haptophyta)
Class same	Prymnesiophyceae (Prymnesiophyceae)	Prymnesiophyceae (Prymnesiophyceae)
Order same	Coccolithales (Coccolithales)	Coccolithales (Coccolithales)
Family same	Hymenomonadaceae	Hymenomonadaceae
Genus same	Hymenomonas	Hymenomonas
Species	Hymenomonas roseola	Hymenomonas coronata

Evolutionary Relationship

Coccolithophorid and share a common ancestor at the Genus level: Hymenomonas.

Conservation Status

Coccolithophorid

NE — Not Evaluated

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

Coccolithophorid

Habitat

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

Range

Distributed across Norway, Sweden, and United States.

Habitat

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

Range

Distributed across Norway, Sweden, and Taiwan.

Coccolithophorid

Hymenomonas roseola is a marine coccolithophore in the class Prymnesiophyceae, belonging to the order Coccolithales—a group of single-celled phytoplankton celebrated for covering their cell surfaces with ornate calcium carbonate scales known as coccoliths. This species is notable for producing distinctive coccoliths with a characteristic architecture visible under electron microscopy. Like all coccolithophores, Hymenomonas roseola plays a significant role in oceanic biogeochemical cycles: the formation of calcium carbonate coccoliths drives the biological carbon pump by fixing inorganic carbon into mineral form, which sinks upon cell death to accumulate in deep-sea sediments. The species inhabits the photic zone of temperate to subtropical marine waters in the North Atlantic, Mediterranean, and Pacific regions, where it has been documented from coastal and open-ocean samples. As a photosynthetic organism, it requires sunlight for carbon fixation and typically blooms in stratified surface waters with adequate nutrients. Coccolithophore blooms can be so dense as to be visible from space as turquoise patches in satellite imagery. Hymenomonas species have also been noted for their ability to calcify in culture, making them useful laboratory models for studying coccolith biomineralization mechanisms and the potential impacts of ocean acidification, which threatens to dissolve calcium carbonate structures as seawater pH decreases. Its conservation status has not been formally evaluated.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden