Unio crassus
| Thick shelled river mussel | |
|---|---|
| Unio crassus from Lužnice River, Czech Republic | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Unionida |
| Family: | Unionidae |
| Genus: | Unio |
| Species: | U. crassus |
| Binomial name | |
| Unio crassus Philipsson in Retzius, 1788 | |
Unio crassus, the thick shelled river mussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.