Brook Floater vs Circular Ear Shell

Alasmidonta varicosa compared with Haliotis cyclobates

Key Differences

• Brook Floater is Vulnerable while Circular Ear Shell is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Circular Ear Shell
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Mollusca (軟体動物)	Mollusca (軟体動物)
Class	Bivalvia (二枚貝)	Gastropoda (腹足綱)
Order	Unionida (イシガイ目)	Lepetellida (Lepetellida)
Family	Unionidae	Haliotidae
Genus	Alasmidonta	Haliotis
Species	Alasmidonta varicosa	Haliotis cyclobates

Evolutionary Relationship

Brook Floater and Circular Ear Shell share a common ancestor at the Phylum level: Mollusca. (軟体動物)

Conservation Status

Brook Floater

VU — Vulnerable

Circular Ear Shell

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Circular Ear Shell
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.

Circular Ear Shell

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

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.

Circular Ear Shell

The Circular Ear Shell (Haliotis cyclobates) is a species in the genus Haliotis. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.