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=5874

Search the database pages:

Unionoida | Unionoidea | Unionidae | Unioninae | Unionini | Nodularia douglasiae

nominal species Margarita (Unio) merchisonianus Lea, 1836

Lea, 1836, Synopsis Fam. Naiades: 14 [corrected in the errata].
(error for Unio murchisonianus Lea, 1834)

= Nodularia douglasiae

Page updated: 11:33:07 Mon 08 Sep 2025