blunt tellin vs

Arcopagia crassa compared with Chrysosphaerella longispina

Key Differences

blunt tellin is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	blunt tellin
Kingdom	Animalia (حيوانات)	Chromista (أسناخ صبغية)
Phylum	Mollusca (رخويات)	Ochrophyta (طحالب داكنة)
Class	Bivalvia (ذوات الصدفتين)	Chrysophyceae (طحالب ذهبية)
Order	Cardiida (Cardiida)	Ochromonadales (Ochromonadales)
Family	Tellinidae	Paraphysomonadaceae
Genus	Arcopagia	Chrysosphaerella
Species	Arcopagia crassa	Chrysosphaerella longispina

Conservation Status

blunt tellin

VU — Vulnerable

NE — Not Evaluated

Physical Characteristics

Attribute	blunt tellin
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

blunt tellin

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

blunt tellin

The Blunt tellin (Arcopagia crassa) is a species in the genus Arcopagia. It is currently classified as Vulnerable on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

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.