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!
nominal species Unio triangularis var. longisculus Parmalee & Bogan, 1998
‘de Gregorio’ Parmalee & Bogan, 1998, The Freshwater Mussels of Tennessee: 108.
‘de Gregorio’ Williams et al., 2008, Freshw. Mussels AL and Mobile Basin: 283.
(error for Unio triangularis var. longiusculus de Gregorio, 1914)