Cave ground-beetle vs Strand-Egerling

Trechus jorgensis compared with Agaricus litoralis

Key Differences

• Cave ground-beetle is Critically Endangered while Strand-Egerling is Least Concern.

Taxonomic Classification

Rank	Cave ground-beetle	Strand-Egerling
Kingdom	Animalia (Tier)	Fungi (Pilze)
Phylum	Arthropoda (Gliederfüßer)	Basidiomycota (Ständerpilze)
Class	Insecta (Insekten)	Agaricomycetes (Mushrooms)
Order	Coleoptera (Käfer)	Agaricales (Champignonartige)
Family	Carabidae	Agaricaceae (Agarics)
Genus	Trechus	Agaricus (Button Mushrooms)
Species	Trechus jorgensis	Agaricus litoralis

Conservation Status

Cave ground-beetle

CR — Critically Endangered

Strand-Egerling

LC — Least Concern

Physical Characteristics

Attribute	Cave ground-beetle	Strand-Egerling
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cave ground-beetle

Habitat

Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Portugal. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Strand-Egerling

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Cave ground-beetle

The Cave ground-beetle (Trechus jorgensis) is a species in the genus Trechus. It is currently classified as Critically Endangered on the IUCN Red List. Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Strand-Egerling

Agaricus litoralis, the coastal mushroom, is a saprotrophic agaric fungus in the family Agaricaceae occurring in sand dunes, coastal grassland, and sandy soil habitats along the coasts of northwestern Europe, with confirmed records from Belgium, Denmark, Norway, and Sweden. The genus Agaricus contains the familiar cultivated button mushroom (A. bisporus) along with hundreds of wild species, and members are characterized by a ring on the stem and browning, discoloring, or non-discoloring flesh when cut, features used in field identification. Agaricus litoralis is a medium-sized mushroom producing white to cream-colored caps 4–10 centimeters across with pinkish then dark brown gills and a stout stem with a double ring, fruiting in sand dune hollows and the grassy margins of coastal habitats from summer through autumn. The specific epithet litoralis refers directly to its coastal habitat preference. As a saprotroph, it decomposes organic matter in the sandy soil substrate, releasing nutrients back into the ecosystem. The species is classified as Least Concern by the IUCN, being relatively widespread in suitable coastal sandy habitat across northwestern Europe. Like many coastal fungi, it is specifically adapted to the nutrient-poor, well-drained, alkaline conditions of stabilized sand dune systems.