Brown Diving Beetle vs Lesser Red-knotgrass

Agabus brunneus compared with Polygonum arenarium

Key Differences

• Brown Diving Beetle is Extinct while Lesser Red-knotgrass is Not Evaluated.

Taxonomic Classification

Rank	Brown Diving Beetle	Lesser Red-knotgrass
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Arthropoda (Arthropods)	Magnoliophyta (Flowering Plants)
Class	Insecta (Insects)	Magnoliopsida (Dicots)
Order	Coleoptera (Beetles)	Caryophyllales (Caryophyllales)
Family	Dytiscidae	Polygonaceae
Genus	Agabus	Polygonum
Species	Agabus brunneus	Polygonum arenarium

Conservation Status

Brown Diving Beetle

EX — Extinct

Lesser Red-knotgrass

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Diving Beetle	Lesser Red-knotgrass
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.

Lesser Red-knotgrass

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (11 countries) and North America (United States).

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.

Shared Countries

Both species can be found in 2 countries:

🇧🇪 Belgium 🇸🇪 Sweden