Brook Floater vs Butterfly ray

Alasmidonta varicosa compared with Gymnura micrura

Key Differences

• Brook Floater is Vulnerable while Butterfly ray is Near Threatened.

Taxonomic Classification

Rank	Brook Floater	Butterfly ray
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Bivalvia (Bivalvia)	Elasmobranchii
Order	Unionida (Unionida)	Myliobatiformes (Myliobatiformes)
Family	Unionidae	Gymnuridae
Genus	Alasmidonta	Gymnura
Species	Alasmidonta varicosa	Gymnura micrura

Evolutionary Relationship

Brook Floater and Butterfly ray share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

Butterfly ray

NT — Near Threatened

Physical Characteristics

Attribute	Brook Floater	Butterfly ray
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.

Butterfly ray

Habitat

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

Range

Found in Venezuela. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Butterfly ray

The Butterfly ray (Gymnura micrura) is a species in the genus Gymnura. It is currently classified as Near Threatened on the IUCN Red List. Native to South America, inhabiting ecosystems characteristic of the region.