Belted spider beetle vs Brook Floater

Ptinus bicinctus compared with Alasmidonta varicosa

Key Differences

• Belted spider beetle is Not Evaluated while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Belted spider beetle	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Coleoptera (Beetles)	Unionida (Unionida)
Family	Ptinidae	Unionidae
Genus	Ptinus	Alasmidonta
Species	Ptinus bicinctus	Alasmidonta varicosa

Evolutionary Relationship

Belted spider beetle and Brook Floater share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Belted spider beetle

NE — Not Evaluated

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Belted spider beetle	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Belted spider beetle

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (26 countries) and North America (Canada, United States).

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.

Belted spider beetle

The Belted spider beetle (Ptinus bicinctus) is a species in the genus Ptinus. Typically found in virtually all terrestrial and freshwater habitats.

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.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States