vs Crowned Sifaka

Chrysococcus cystophorus compared with Propithecus coronatus

Key Differences

is Not Evaluated while Crowned Sifaka is Critically Endangered.

Taxonomic Classification

Rank		Crowned Sifaka
Kingdom	Chromista (Chromista)	Animalia (Tier)
Phylum	Ochrophyta (Ochrophyta)	Chordata (Chordatiere)
Class	Chrysophyceae (Goldbraune Algen)	Mammalia (Säugetiere)
Order	Chromulinales (Chromulinales)	Primates (Primaten)
Family	Dinobryaceae	Indriidae
Genus	Chrysococcus	Propithecus
Species	Chrysococcus cystophorus	Propithecus coronatus

Conservation Status

NE — Not Evaluated

Crowned Sifaka

CR — Critically Endangered

Physical Characteristics

Attribute		Crowned Sifaka
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.

Crowned Sifaka

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Chrysococcus cystophorus is a unicellular freshwater chrysophyte microalga in the genus Chrysococcus, family Chromulinaceae, class Chrysophyceae. The specific epithet cystophorus, meaning cyst-bearing, references this species' relationship with siliceous cyst formation — a shared feature across many chrysophytes that produce species-specific resting stages called stomatocysts or statospores. In chrysophytes, the stomatocyst is a silicified internal cyst with a characteristic plug-sealed pore, and its morphology is often used as an additional taxonomic character in species identification. C. cystophorus inhabits freshwater environments and has been recorded from Norwegian waters along with other Scandinavian localities, fitting the pattern of chrysophyte species diversity documented through freshwater surveys in the region. Chrysococcus cells are enclosed within a lorica — a proteinaceous or organic outer vessel — from which flagella emerge for locomotion. The lorica shape and ornamentation, along with the dimensions and flagellar arrangement, are primary characters used for species identification. Like other chrysophytes, C. cystophorus is golden-brown in color owing to chlorophylls a and c together with fucoxanthin pigments in the chloroplast. Chrysococcus species function as primary producers in freshwater plankton communities, particularly in oligotrophic lakes where smaller algae outcompete larger taxa. C. cystophorus has not been evaluated under IUCN Red List criteria and is listed as Not Evaluated, consistent with the general status of freshwater microalgal taxa.