Brown Diving Beetle vs

Agabus brunneus compared with Chrysochromulina simplex

Key Differences

Brown Diving Beetle is Extinct while is Not Evaluated.

Taxonomic Classification

Rank	Brown Diving Beetle
Kingdom	Animalia (สัตว์)	Chromista (โครมิสตา)
Phylum	Arthropoda (สัตว์ขาปล้อง)	Haptophyta (Haptophyta)
Class	Insecta (แมลง)	Prymnesiophyceae (Prymnesiophyceae)
Order	Coleoptera (อันดับด้วง)	Prymnesiales (Prymnesiales)
Family	Dytiscidae	Chrysochromulinaceae
Genus	Agabus	Chrysochromulina
Species	Agabus brunneus	Chrysochromulina simplex

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 and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, 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.

Chrysochromulina simplex is a haptophyte microalga in the family Prymnesiaceae, its specific epithet simplex (Latin: simple or plain) suggesting cells that lack elaborate ornamental scales compared with more complex congeners. Cells are biflagellate, bearing two unequal flagella and a haptonema of variable development. The cell surface, while bearing scales, may display less complex scale architecture than in other Chrysochromulina species. C. simplex inhabits marine and brackish coastal waters, with records from northern European seas including the coasts of Scandinavia. The genus Chrysochromulina is a major contributor to nanoplankton communities in cool, nutrient-enriched coastal waters, where haptophytes can dominate the phytoplankton biomass during seasonal stratification events. Mixotrophic capabilities documented in congeners allow flexible nutritional strategies in seasonally variable environments. The species has not been evaluated for conservation status by the IUCN and is listed as Not Evaluated. Free-living marine protists with cosmopolitan tendencies are generally resilient to localized environmental disturbances, though global ocean changes such as warming and acidification may shift community composition over longer timescales.