Scientific and Common Names of Freshwater Bivalves of the US and Canada

Summary of changes made in 2021 to the Williams et al. (2017) list.
Download a PDF of the list.

Currently, the bivalve list includes those in the order Unionida in the U.S. and Canada.

Petitions to modify this list can be submitted to the appropriate subcommittee using this form. Petitions will be reviewed and voted on at the next biannual meeting of the names subcommittee.
Please send petitions to the bivalve names subcommittee chair,
John Harris -

2023 Symposium Bivalve Agenda and Petition


Chair: John HARRIS - Arkansas State University - (

Voting Members:
Arthur E. Bogan (North Carolina Museum of Natural Sciences)
Kevin S. Cummings (Illinois Natural History Survey)
Andrew Henderson (Asheville Field Office, U. S. Fish and Wildlife Service)
John M. Pfeiffer (U. S. National Museum of Natural History)
Nathan A. Johnson (U. S. Geological Survey, Gainesville, FL)
Kevin J. Roe (Iowa State University)

Freshwater Mollusk Conservation Society (FMCS). 2021.
The 2021 checklist of freshwater bivalves (Mollusca: Bivalvia: Unionida) of the United States and Canada. Considered and approved by the Bivalve Names Subcommittee December 2020.