Brook Floater vs Lesser Spotted Fritillary

Alasmidonta varicosa compared with Melitaea trivia

Key Differences

• Brook Floater is Vulnerable while Lesser Spotted Fritillary is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Lesser Spotted Fritillary
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Arthropoda (Arthropods)
Class	Bivalvia (Bivalvia)	Insecta (Insects)
Order	Unionida (Unionida)	Lepidoptera (Butterflies & Moths)
Family	Unionidae	Nymphalidae (Brush-footed Butterflies)
Genus	Alasmidonta	Melitaea
Species	Alasmidonta varicosa	Melitaea trivia

Evolutionary Relationship

Brook Floater and Lesser Spotted Fritillary share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

Lesser Spotted Fritillary

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Lesser Spotted Fritillary
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.

Lesser Spotted Fritillary

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (21 countries).

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.