Brown Diving Beetle vs Common Fieldcap

Agabus brunneus compared with Agrocybe pediades

Key Differences

• Brown Diving Beetle is Extinct while Common Fieldcap is Least Concern.

Taxonomic Classification

Rank	Brown Diving Beetle	Common Fieldcap
Kingdom	Animalia (animal)	Fungi (Fungi)
Phylum	Arthropoda (arthropodes)	Basidiomycota (Club Fungi)
Class	Insecta (insecte)	Agaricomycetes (Mushrooms)
Order	Coleoptera (Beetles)	Agaricales (Gilled Mushrooms)
Family	Dytiscidae	Strophariaceae
Genus	Agabus	Agrocybe
Species	Agabus brunneus	Agrocybe pediades

Conservation Status

Brown Diving Beetle

EX — Extinct

Common Fieldcap

LC — Least Concern

Physical Characteristics

Attribute	Brown Diving Beetle	Common Fieldcap
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.

Common Fieldcap

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Found across Europe (5 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.

Common Fieldcap

The Common Fieldcap (<em>Agrocybe pediades</em>) is a saprotrophic fungus belonging to the genus Agrocybe within the family Strophariaceae. It typically produces small, tan to pale brown cap-shaped fruiting bodies and is often found growing in clusters or scattered on lawns, grassy areas, forest floors, decomposing wood, and soil-rich ecosystems. The species typically inhabits forest floors, decomposing wood, and soil ecosystems, obtaining nutrients by breaking down dead organic matter. Its geographic range includes several European countries — Belgium, Denmark, Norway, Portugal, and Sweden — as well as the United States in North America. <em>Agrocybe pediades</em> is assessed as Least Concern on the IUCN Red List, reflecting its broad distribution and apparent stability. Biological traits of this species, including specific data on fruiting body size, lifespan, and ecological preferences, remain poorly documented in the scientific literature. Like other members of its genus, it typically fruits during warmer months and often appears after rainfall in nutrient-rich grassland and woodland habitats.

Shared Countries

Both species can be found in 2 countries:

🇧🇪 Belgium 🇸🇪 Sweden