The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

The MUSSEL Project Database is moving to a new server, with a new URL! The new address for this page will be: https://musselpdb.org/fmuotwaolcb/db.php?ty=nomsp&id=5674

Search the database pages:

Unionoida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Psoronaias semigranosa

nominal species Unio crocodilarum Simpson, 1900

‘Morelet’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 702.
Simpson, 1914, Descr. Cat. Naiades: 591.
Haas, 1929, Senckenbergiana 11: 332.
(error for Unio crocodilorum Morelet, 1849)

= Psoronaias semigranosa

Page updated: 09:38:50 Mon 28 Jul 2025