Brook Floater vs Comb-footed spider

Alasmidonta varicosa compared with Parasteatoda tabulata

Key Differences

• Brook Floater is Vulnerable while Comb-footed spider is Not Evaluated.

Taxonomic Classification

Rank	Brook Floater	Comb-footed spider
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Arthropoda (Arthropods)
Class	Bivalvia (Bivalvia)	Arachnida (Arachnids)
Order	Unionida (Unionida)	Araneae (Araneae)
Family	Unionidae	Theridiidae
Genus	Alasmidonta	Parasteatoda
Species	Alasmidonta varicosa	Parasteatoda tabulata

Evolutionary Relationship

Brook Floater and Comb-footed spider share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

Comb-footed spider

NE — Not Evaluated

Physical Characteristics

Attribute	Brook Floater	Comb-footed spider
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.

Comb-footed spider

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Distributed across Denmark, Germany, Sweden, and United States.

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.

Comb-footed spider

<em>Parasteatoda tabulata</em> is an arachnid in the family Theridiidae, commonly grouped with comb-footed spiders. It has been recorded from Europe and the United States, indicating a broad distribution across temperate regions of the Northern Hemisphere. Like other members of the family Theridiidae, <em>P. tabulata</em> constructs irregular, tangled cobwebs in sheltered locations such as corners of buildings, under eaves, rock crevices, and dense vegetation. The species uses its characteristically comb-like hind tarsal setae to manipulate silk and wrap prey. It is a generalist predator of small insects and other arthropods that become ensnared in its web. Members of this family are small spiders, generally spending their adult lives in close association with their webs. The species has not been formally assessed by the IUCN, and specific quantitative biological trait data are not available in the current record.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States