Black Laceweaver vs Common Bithynia

Amaurobius ferox compared with Bithynia tentaculata

Taxonomic Classification

Rank	Black Laceweaver	Common Bithynia
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum	Arthropoda (مفصليات الأرجل)	Mollusca (رخويات)
Class	Arachnida (عنكبيات)	Gastropoda (بطنيات القدم)
Order	Araneae (عنكبوت)	Littorinimorpha (ونكيات الشكل)
Family	Amaurobiidae	Bithyniidae
Genus	Amaurobius	Bithynia
Species	Amaurobius ferox	Bithynia tentaculata

Evolutionary Relationship

Black Laceweaver and Common Bithynia share a common ancestor at the Kingdom level: Animalia. (حيوانات)

Conservation Status

Black Laceweaver

LC — Least Concern

Common Bithynia

LC — Least Concern

Physical Characteristics

Attribute	Black Laceweaver	Common Bithynia
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black Laceweaver

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Distributed across Belgium, Canada, Denmark, Sweden, and United States.

Common Bithynia

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Black Laceweaver

The Black Laceweaver (Amaurobius ferox) is a species in the genus Amaurobius. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial habitats from forests to deserts.

Common Bithynia

The common bithynia (<em>Bithynia tentaculata</em>) is a freshwater gastropod snail belonging to the family Bithyniidae. It is classified as Least Concern on the IUCN Red List and has been recorded across terrestrial and aquatic habitats in Belgium, Denmark, Norway, Sweden, and the United States. <em>Bithynia tentaculata</em> typically inhabits slow-moving or still freshwater environments such as lakes, ponds, canals, and rivers, often on muddy or sandy substrates where organic material is abundant. The species has a distinctive operculum that seals the shell opening, providing protection against desiccation and predators. It typically feeds by grazing on algae, detritus, and biofilms on submerged surfaces. The common bithynia serves as an intermediate host for several trematode parasites, making it ecologically significant in freshwater food webs and parasite life cycles. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇸🇪 Sweden 🇺🇸 United States