Blackhead worm vs Common Fieldcap

Aporrectodea longa compared with Agrocybe pediades

Key Differences

Blackhead worm is Not Evaluated while Common Fieldcap is Least Concern.

Taxonomic Classification

Rank	Blackhead worm	Common Fieldcap
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Annelida (Segmented Worms)	Basidiomycota (Club Fungi)
Class	Clitellata (Clitellata)	Agaricomycetes (Mushrooms)
Order	Crassiclitellata (Crassiclitellata)	Agaricales (Gilled Mushrooms)
Family	Lumbricidae	Strophariaceae
Genus	Aporrectodea	Agrocybe
Species	Aporrectodea longa	Agrocybe pediades

Conservation Status

Blackhead worm

NE — Not Evaluated

Common Fieldcap

LC — Least Concern

Physical Characteristics

Attribute	Blackhead worm	Common Fieldcap
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackhead worm

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Common Fieldcap

Habitat

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

Range

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

Blackhead worm

The Blackhead worm (Aporrectodea longa) is a species in the genus Aporrectodea. Native to Europe and North America, inhabiting ecosystems characteristic of the region. Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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.