Brook Floater vs Common Grey Disco

Alasmidonta varicosa compared with Mollisia cinerea

Key Differences

• Brook Floater is Vulnerable while Common Grey Disco is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Common Grey Disco
Kingdom	Animalia (hewan)	Fungi (Fungi)
Phylum	Mollusca (Moluska)	Ascomycota (Sac Fungi)
Class	Bivalvia (Bivalvia)	Leotiomycetes (Leotiomycetes)
Order	Unionida (Unionida)	Helotiales (Helotiales)
Family	Unionidae	Mollisiaceae
Genus	Alasmidonta	Mollisia
Species	Alasmidonta varicosa	Mollisia cinerea

Conservation Status

Brook Floater

VU — Vulnerable

Common Grey Disco

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Common Grey Disco
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Floater

Habitat

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

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Grey Disco

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Portugal, and Sweden.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.

Common Grey Disco

<em>Mollisia cinerea</em>, commonly known as the common grey disco, is a saprotrophic fungus belonging to the genus Mollisia within the family Mollisiaceae. This species is native to Europe, with a documented range spanning Belgium, Denmark, Norway, Portugal, and Sweden. Common grey disco is assessed as Least Concern on the IUCN Red List. The species typically produces small, disc-shaped ascocarps with a grey to brownish-grey upper surface, typically emerging on decaying wood and plant debris in moist woodland habitats. As a decomposer, it plays an important ecological role in nutrient cycling within temperate forest ecosystems. Biological traits of this species remain poorly documented in the scientific literature.