vs Japanese Squirrel

Chrysosphaerella longispina compared with Sciurus lis

Key Differences

is Not Evaluated while Japanese Squirrel is Least Concern.

Taxonomic Classification

Rank		Japanese Squirrel
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	Sciuridae (Squirrels)
Genus	Chrysosphaerella	Sciurus (Tree Squirrels)
Species	Chrysosphaerella longispina	Sciurus lis

Conservation Status

NE — Not Evaluated

Japanese Squirrel

LC — Least Concern

Physical Characteristics

Attribute		Japanese Squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Japanese Squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Belgium, France, Netherlands, and United Kingdom.

Chrysosphaerella longispina is a colonial chrysophyte alga in the genus Chrysosphaerella, notable for the long silica spines (longispina: Latin, long spine) that project from each cell in the colony. The genus is characterized by spherical or discoid colonies of photosynthetic cells that each secrete siliceous scales and elongated spine-like appendages, making Chrysosphaerella colonies distinctively bristled and visible under light microscopy. The long spines of C. longispina likely serve as anti-predation structures that make the colonies more difficult for zooplankton to ingest. C. longispina is found in cold, oligotrophic freshwater lakes, particularly in Scandinavia, where comprehensive chrysophyte surveys have documented its presence. Chrysosphaerella colonies contribute to freshwater primary production and the cycling of biogenic silica, which upon cell dissolution is deposited in lake sediments as microscopically identifiable remains. These silica structures are widely used by paleolimnologists to reconstruct past changes in lake water chemistry, thermal stratification, and climate. The conservation status of C. longispina has not been assessed by the IUCN; the species is listed as Not Evaluated.