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=4927 
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 Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini | Ptychobranchus subtentus nominal species Unio subteritus [sic] var. purchreornatus de Gregorio, 1914
 
     de Gregorio, 1914, Il Nat. Siciliano 2: 61, pl. 9, figs. 2a-d.
    (intro'd as intra-sp. of Unio subtentus Say, 1825)
 
= Ptychobranchus subtentus Taxonomic Opinions
	+ Ptychobranchus subtentum (Say, 1825) — Williams et al., 2008 
	+ Ptychobranchus subtentum (Say, 1825) — Parmalee & Bogan, 1998 
	= Unio subteritus [sic] var. purchreornatus de Greg. — de Gregorio, 1914 
 
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