Arctic Fingernailclam vs Rhomboid Fingernailclam

Sphaerium nitidum compared with Sphaerium rhomboideum

Taxonomic Classification

Rank	Arctic Fingernailclam	Rhomboid Fingernailclam
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Mollusca (Mollusks)	Mollusca (Mollusks)
Class same	Bivalvia (Bivalvia)	Bivalvia (Bivalvia)
Order same	Sphaeriida (Sphaeriida)	Sphaeriida (Sphaeriida)
Family same	Sphaeriidae	Sphaeriidae
Genus same	Sphaerium	Sphaerium
Species	Sphaerium nitidum	Sphaerium rhomboideum

Evolutionary Relationship

Arctic Fingernailclam and Rhomboid Fingernailclam share a common ancestor at the Genus level: Sphaerium.

Conservation Status

Arctic Fingernailclam

LC — Least Concern

Rhomboid Fingernailclam

LC — Least Concern

Physical Characteristics

Attribute	Arctic Fingernailclam	Rhomboid Fingernailclam
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Arctic Fingernailclam

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway, Sweden, and United States.

Rhomboid Fingernailclam

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and United States.

Arctic Fingernailclam

The Arctic Fingernailclam (Sphaerium nitidum) is a species in the genus Sphaerium. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇺🇸 United States