The MUSSEL Project Web Site is moving to a new hosting server!

When? Soon! The MUSSELpdb and associated web pages are currently being built at the new address: https://musselpdb.org. In the next couple months, we expect fully shift from this server to the new one.

Why? Right now, let's just say it will be better. http://mussel-project.net will always point to the "official" version.

Watch this space for more information!

Browse the MUSSELp Database!
The Freshwater Mussels (Unionoida) of the World
(and other less consequential bivalves)

Search the database pages:

The searching function is handled by a Google Custom Search Engine.

The August 2025 Mussel of the Month is Pustulosa nodulata. The genus Pustulosa (Unionidae) is composed of 9 species from eastern North America.

Pustulosa nodulata, as Mussel of the Month, will serve as an exemplar to explore the evolution of our knowledge of the relationships among freshwater mussels and their larval hosts.

The MUSSEL Project Database Dashboard

The MUSSELpdb-db is a quick summary of the current state of freshwater mussel species & genus richness, according to the MUSSEL Project Database (the MUSSELpdb).

Current Number of Freshwater Mussel Species:

1023

Current Number of Freshwater Mussel Genera:

214

Last Updated
Thu 7 August 2025

Click here for a detailed summary of species and genus richness by taxonomy.

Click here for a detailed summary of species richness and endemism by geography.

"Making the world a better place, one mollusk at a time."
	The MUSSEL Project — Home Page http://www.mussel-project.net/. Site developed and maintained by Dan Graf & Kevin Cummings. Hosted by The University of Wisconsin-Stevens Point. Funded by The National Science Foundation.