Swamp Orb Mussel vs Witham Orb Mussel

Sphaerium nucleus compared with Sphaerium solidum

Key Differences

• Swamp Orb Mussel is Least Concern while Witham Orb Mussel is Near Threatened.

Taxonomic Classification

Rank	Swamp Orb Mussel	Witham Orb Mussel
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Mollusca (มอลลัสกา)	Mollusca (มอลลัสกา)
Class same	Bivalvia (ชั้นไบวาลเวีย)	Bivalvia (ชั้นไบวาลเวีย)
Order same	Sphaeriida (Sphaeriida)	Sphaeriida (Sphaeriida)
Family same	Sphaeriidae	Sphaeriidae
Genus same	Sphaerium	Sphaerium
Species	Sphaerium nucleus	Sphaerium solidum

Evolutionary Relationship

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

Conservation Status

Swamp Orb Mussel

LC — Least Concern

Witham Orb Mussel

NT — Near Threatened

Physical Characteristics

Attribute	Swamp Orb Mussel	Witham Orb Mussel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Swamp Orb Mussel

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Sweden, 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