vs

Chrysochromulina acantha compared with Chrysochromulina cyathophora

Taxonomic Classification

Rank
Kingdom same	Chromista (โครมิสตา)	Chromista (โครมิสตา)
Phylum same	Haptophyta (Haptophyta)	Haptophyta (Haptophyta)
Class same	Prymnesiophyceae (Prymnesiophyceae)	Prymnesiophyceae (Prymnesiophyceae)
Order same	Prymnesiales (Prymnesiales)	Prymnesiales (Prymnesiales)
Family same	Chrysochromulinaceae	Chrysochromulinaceae
Genus same	Chrysochromulina	Chrysochromulina
Species	Chrysochromulina acantha	Chrysochromulina cyathophora

Evolutionary Relationship

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

ดู: Genus: Chrysochromulina

Conservation Status

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 Norway and Sweden.

Chrysochromulina acantha is a microscopic marine haptophyte alga belonging to the family Prymnesiaceae. Like other members of the genus Chrysochromulina, it possesses two flagella of unequal length and a unique organelle called the haptonema, which is used for prey capture and surface attachment. The cell surface is covered with organic scales arranged in overlapping layers, a diagnostic feature of the genus. C. acantha is a unicellular phytoplankton found in coastal and open-ocean environments, contributing to marine primary productivity. Members of this genus are known from temperate and cold-water seas of the Northern Hemisphere, particularly Scandinavian coastal waters. Some Chrysochromulina species can form dense blooms under favorable nutrient conditions, occasionally producing toxic compounds harmful to fish and invertebrates. The species has not been formally assessed by the IUCN, and its conservation status remains Not Evaluated. As a free-living microorganism, it does not face the same threats as larger organisms, though shifts in ocean chemistry and temperature may influence its distribution and abundance over time.

Chrysochromulina cyathophora is a unicellular marine haptophyte in the genus Chrysochromulina, order Prymnesiales, class Prymnesiophyceae. The specific epithet cyathophora derives from Greek meaning cup-bearing, describing a characteristic cup-shaped element — likely a scale morphology — visible under transmission electron microscopy. Such ultrastructural features are essential for species identification within Chrysochromulina, where species are otherwise morphologically similar at the light microscopy level. C. cyathophora is known from Norwegian coastal marine environments and has also been recorded from Brazilian waters, a distribution pattern shared by several Chrysochromulina species, suggesting either broad Atlantic dispersal or recurrent misidentification across these distant populations. The species occupies the nanoplankton size fraction and is adapted to life in the water column of coastal to open-ocean marine systems. Chrysochromulina species as a group are important contributors to marine primary production, particularly in oligotrophic environments where smaller phytoplankton dominate. They may also practice mixotrophy — ingesting bacteria and small prey alongside photosynthesis — providing metabolic flexibility in nutrient-limited conditions. The life cycle of Chrysochromulina typically involves asexual division, though sexual stages are poorly documented for most species. C. cyathophora has not been assessed under the IUCN Red List framework, carrying a conservation status of Not Evaluated, consistent with the broader treatment of marine microplankton taxa that present significant challenges for population-level assessment and threat evaluation.