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 has moved to a new server, with a new URL! The new address for this page is: https://musselpdb.org/db.php?ty=nomsp&id=5785

Search the database pages:

Unionoida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Nephronaias calamitarum

nominal species Unio calamitarum var. prolongus Frierson, 1927

‘C. & F.’ Frierson, 1927, Check List N. Amer. Naiades: 36.
(error for Unio calamitarum var. B prolongata Fischer & Crosse, 1894)

= Nephronaias calamitarum

Page updated: 11:52:22 Mon 08 Sep 2025