Brook Floater vs Johan-Stachelmaus

Alasmidonta varicosa compared with Acomys johannis

Key Differences

• Brook Floater is Vulnerable while Johan-Stachelmaus is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Johan-Stachelmaus
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Mollusca (Weichtiere)	Chordata (Chordatiere)
Class	Bivalvia (Muscheln)	Mammalia (Säugetiere)
Order	Unionida (Unionida)	Rodentia (Nagetiere)
Family	Unionidae	Muridae (Mice & Rats)
Genus	Alasmidonta	Acomys
Species	Alasmidonta varicosa	Acomys johannis

Evolutionary Relationship

Brook Floater and Johan-Stachelmaus share a common ancestor at the Kingdom level: Animalia. (Tier)

Conservation Status

Brook Floater

VU — Vulnerable

Johan-Stachelmaus

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Johan-Stachelmaus
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.

Johan-Stachelmaus

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

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.