Painter's Mussel vs Thick Shelled River Mussel

Unio pictorum compared with Unio crassus

Key Differences

• Painter's Mussel is Near Threatened while Thick Shelled River Mussel is Endangered.

Taxonomic Classification

Rank	Painter's Mussel	Thick Shelled River Mussel
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum same	Mollusca (มอลลัสกา)	Mollusca (มอลลัสกา)
Class same	Bivalvia (ชั้นไบวาลเวีย)	Bivalvia (ชั้นไบวาลเวีย)
Order same	Unionida (Unionida)	Unionida (Unionida)
Family same	Unionidae	Unionidae
Genus same	Unio	Unio
Species	Unio pictorum	Unio crassus

Evolutionary Relationship

Painter's Mussel and Thick Shelled River Mussel share a common ancestor at the Genus level: Unio.

Conservation Status

Painter's Mussel

NT — Near Threatened

Thick Shelled River Mussel

EN — Endangered

Physical Characteristics

Attribute	Painter's Mussel	Thick Shelled River Mussel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Painter's Mussel

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Thick Shelled River Mussel

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and Ukraine. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden