Hi Lance @lance-comfort, I am just trying to learn about fossil identification so I think your knowledge base is much greater than mine. I did do some web searches about Lopha species. I did find one East Coast citation in North Carolina for Lopha frons
http://discoverlife.org/mp/20q?guide=Mollusca_Bivalvia_species&flags=HAS:
Also checking further the name Lopha frons is not accepted and the valid name is: Dendostrea frons
http://z14.invisionfree.com/Conchologist_Forum/ar/t2410.htm
Might this be what you found?
What resources do you find best for identifying invertebrate fossils?
Jim Chandler