Brown Diving Beetle vs

Agabus brunneus compared with Chrysococcus minutus

Key Differences

Brown Diving Beetle is Extinct while is Not Evaluated.

Taxonomic Classification

Rank	Brown Diving Beetle
Kingdom	Animalia (حيوانات)	Chromista (أسناخ صبغية)
Phylum	Arthropoda (مفصليات الأرجل)	Ochrophyta (طحالب داكنة)
Class	Insecta (حشرات)	Chrysophyceae (طحالب ذهبية)
Order	Coleoptera (خنفساء)	Chromulinales (Chromulinales)
Family	Dytiscidae	Dinobryaceae
Genus	Agabus	Chrysococcus
Species	Agabus brunneus	Chrysococcus minutus

Conservation Status

Brown Diving Beetle

EX — Extinct

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Diving Beetle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Diving Beetle

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium and Sweden.

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Brown Diving Beetle

The Brown Diving Beetle (Agabus brunneus) is a species in the genus Agabus. It is currently classified as Extinct on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

Chrysococcus minutus is a small loricate chrysophyte alga in the genus Chrysococcus, its epithet minutus (Latin: minute or very small) reflecting its diminutive cell dimensions. Like its congeners, the cell is enclosed within a lorica — a rigid, often silicified or organic housing with an apical pore through which the flagellum protrudes. The lorica shape and dimensions provide taxonomic characters for species differentiation within the genus. C. minutus inhabits freshwater environments, including oligotrophic lakes, bog pools, and slow-moving waters in temperate and subarctic regions. Chrysophytes thrive in cold, acidic, low-nutrient waters and serve as reliable bioindicators of water quality. The small cell size of C. minutus places it within the nanoplankton size class, making it an important prey item for heterotrophic nanoflagellates and small ciliates in the freshwater microbial food web. Some Chrysococcus species supplement photosynthesis with bacterivorous feeding. The species has not been evaluated for conservation status and is listed as Not Evaluated by the IUCN. Loricated chrysophytes like C. minutus leave fossil siliceous cysts (stomatocysts) in lake sediments, which are widely used in paleoecological reconstructions.