Circular Ear Shell vs Common Fieldcap

Haliotis cyclobates compared with Agrocybe pediades

Taxonomic Classification

Rank	Circular Ear Shell	Common Fieldcap
Kingdom	Animalia (動物)	Fungi (菌界)
Phylum	Mollusca (軟体動物)	Basidiomycota (担子菌門)
Class	Gastropoda (腹足綱)	Agaricomycetes (真正担子菌綱)
Order	Lepetellida (Lepetellida)	Agaricales (ハラタケ目)
Family	Haliotidae	Strophariaceae
Genus	Haliotis	Agrocybe
Species	Haliotis cyclobates	Agrocybe pediades

Conservation Status

Circular Ear Shell

LC — Least Concern

Common Fieldcap

LC — Least Concern

Physical Characteristics

Attribute	Circular Ear Shell	Common Fieldcap
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Circular Ear Shell

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Common Fieldcap

Habitat

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

Range

Found across Europe (5 countries) and North America (United States).

Circular Ear Shell

The Circular Ear Shell (Haliotis cyclobates) is a species in the genus Haliotis. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

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.