nut fingernailclam vs Witham Orb Mussel

Sphaerium rivicola compared with Sphaerium solidum

Key Differences

• nut fingernailclam is Not Evaluated while Witham Orb Mussel is Near Threatened.

Taxonomic Classification

Rank	nut fingernailclam	Witham Orb Mussel
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 rivicola	Sphaerium solidum

Evolutionary Relationship

nut fingernailclam and Witham Orb Mussel share a common ancestor at the Genus level: Sphaerium.

Conservation Status

nut fingernailclam

NE — Not Evaluated

Witham Orb Mussel

NT — Near Threatened

Physical Characteristics

Attribute	nut fingernailclam	Witham Orb Mussel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

nut fingernailclam

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Ukraine.

Witham Orb Mussel

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway