Azorean predacious diving beetle vs

Agabus godmanni compared with Chrysosphaerella longispina

Key Differences

• Azorean predacious diving beetle is Endangered while is Not Evaluated.

Taxonomic Classification

Rank	Azorean predacious diving beetle
Kingdom	Animalia (动物界)	Chromista (色藻界)
Phylum	Arthropoda (节肢动物门)	Ochrophyta (淡色藻门)
Class	Insecta (昆蟲綱)	Chrysophyceae (丽生菌纲)
Order	Coleoptera (鞘翅目)	Ochromonadales (棕鞭藻目)
Family	Dytiscidae	Paraphysomonadaceae
Genus	Agabus	Chrysosphaerella
Species	Agabus godmanni	Chrysosphaerella longispina

Conservation Status

Azorean predacious diving beetle

EN — Endangered

NE — Not Evaluated

Physical Characteristics

Attribute	Azorean predacious diving beetle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Azorean predacious diving beetle

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found in Portugal. Currently classified as Endangered 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.

Azorean predacious diving beetle

The Azorean predacious diving beetle (Agabus godmanni) is a species in the genus Agabus. It is currently classified as Endangered on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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.