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=6402

Search the database pages:

Unionoida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Psoronaias guatemalensis

nominal species Elliptio divaricatus Marshall, 1926

Marshall, 1926, Proc. U.S. Nat. Mus. 69(2638): 5, pl. 1, figs. 1-2; pl. 3, fig. 3.
Type(s): TYPE USNM_362398, Finca de Providencia, Guatemala.

= Psoronaias guatemalensis

Page updated: 09:08:45 Sun 07 Sep 2025