vs Clarke s Vole

Chrysosphaerella annulata compared with Microtus clarkei

Key Differences

is Not Evaluated while Clarke s Vole is Least Concern.

Taxonomic Classification

Rank		Clarke s Vole
Kingdom	Chromista (クロミスタ)	Animalia (動物)
Phylum	Ochrophyta (オクロ植物)	Chordata (脊索動物)
Class	Chrysophyceae (黄金色藻)	Mammalia (哺乳類)
Order	Ochromonadales (Ochromonadales)	Rodentia (ネズミ目)
Family	Paraphysomonadaceae	Cricetidae
Genus	Chrysosphaerella	Microtus
Species	Chrysosphaerella annulata	Microtus clarkei

Conservation Status

NE — Not Evaluated

Clarke s Vole

LC — Least Concern

Physical Characteristics

Attribute		Clarke s Vole
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.

Clarke s Vole

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Chrysosphaerella annulata is a colonial freshwater chrysophyte microalga in the genus Chrysosphaerella, class Chrysophyceae. Unlike unicellular loricate chrysophytes, Chrysosphaerella species form spherical or ellipsoidal free-floating colonies in which individual cells are embedded in a common gelatinous matrix. The individual cells bear long siliceous scales with distinctive ring-like or annular structures — referenced by the species epithet annulata — projecting outward from the colony surface, giving the colony a spiny appearance under microscopy. These siliceous scales are species-specific and their morphology, as revealed through electron microscopy, is the primary character for identifying Chrysosphaerella species. C. annulata has been recorded from Norwegian and Swedish freshwater environments, consistent with the Scandinavian emphasis in chrysophyte research and the high diversity of chrysophytes in boreal freshwater systems. Chrysosphaerella colonies are planktonic, inhabiting the limnetic zone of oligotrophic to mesotrophic lakes where they may form locally conspicuous populations during favorable conditions. The species uses chlorophylls a and c with fucoxanthin for photosynthesis, contributing to primary production. Chrysosphaerella scales can accumulate in lake sediments, providing a record of past community composition and environmental conditions. C. annulata has not been assessed under IUCN criteria and is classified as Not Evaluated. Its documentation contributes to understanding the diversity of colonial chrysophyte forms in northern European freshwater ecosystems.

Clarke s Vole

The Clarke s Vole (Microtus clarkei) is a species in the genus Microtus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.