Beech Tarcrust vs Common Fieldcap

Biscogniauxia nummularia compared with Agrocybe pediades

Key Differences

• Beech Tarcrust is Data Deficient while Common Fieldcap is Least Concern.

Taxonomic Classification

Rank	Beech Tarcrust	Common Fieldcap
Kingdom same	Fungi (Fungi)	Fungi (Fungi)
Phylum	Ascomycota (Sac Fungi)	Basidiomycota (Club Fungi)
Class	Sordariomycetes (Sordariomycetes)	Agaricomycetes (Mushrooms)
Order	Xylariales (Xylariales)	Agaricales (Gilled Mushrooms)
Family	Graphostromataceae	Strophariaceae
Genus	Biscogniauxia	Agrocybe
Species	Biscogniauxia nummularia	Agrocybe pediades

Evolutionary Relationship

Beech Tarcrust and Common Fieldcap share a common ancestor at the Kingdom level: Fungi. (Fungi)

Conservation Status

Beech Tarcrust

DD — Data Deficient

Common Fieldcap

LC — Least Concern

Physical Characteristics

Attribute	Beech Tarcrust	Common Fieldcap
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Beech Tarcrust

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (Taiwan), Europe (7 countries), and South America (Brazil).

Common Fieldcap

Habitat

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

Range

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

Beech Tarcrust

The Beech Tarcrust (Biscogniauxia nummularia) is a species in the genus Biscogniauxia. Its conservation status is listed as Data Deficient, indicating insufficient data for assessment. Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

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 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden