The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids.
Read more on WikipediaOccurrences by Geologic Period
Temporal Range
Geographic Distribution
Classification Summary
By Phylum
| Mollusca | 410 |
By Class
| Bivalvia | 410 |
By Environment
No data.