Brook Floater vs Common Ink Cap

Alasmidonta varicosa compared with Coprinopsis atramentaria

Key Differences

Brook Floater is Vulnerable while Common Ink Cap is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Common Ink Cap
Kingdom	Animalia (động vật)	Fungi (nấm)
Phylum	Mollusca (động vật thân mềm)	Basidiomycota (Club Fungi)
Class	Bivalvia (Thân mềm hai mảnh vỏ)	Agaricomycetes (Mushrooms)
Order	Unionida (Unionoida)	Agaricales (Gilled Mushrooms)
Family	Unionidae	Psathyrellaceae
Genus	Alasmidonta	Coprinopsis
Species	Alasmidonta varicosa	Coprinopsis atramentaria

Conservation Status

Brook Floater

VU — Vulnerable

Common Ink Cap

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Common Ink Cap
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 Ink Cap

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), and North America (United States).

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 Ink Cap

<em>Coprinopsis atramentaria</em>, commonly known as the common ink cap, is a saprotrophic fungus in the family Psathyrellaceae. It is classified as Least Concern on the IUCN Red List, with a distribution spanning Asia (including Taiwan), Europe, and North America. The species typically grows on forest floors, buried wood, stumps, and other decomposing woody substrates in temperate regions. As a saprotroph, it plays an important ecological role in breaking down organic matter. The common ink cap is notable for containing coprine, a compound that inhibits aldehyde dehydrogenase and causes unpleasant reactions when consumed with alcohol. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.