I had the good fortune to visit the CEMEX Brooksville mine with the Tampa Bay Fossil Club last week, where I wanted to look specifically for examples of Phymotaxis mansfieldi. I had dolomitic casts from the Santa Fe river, but that was it. I was fortunate enough to find a nice one this trip along with a very tiny one and a partial. This post, however, is looking for the ID for the rather large "clammy" bivalve which was fairly common in the Suwannee Limestone in this mine. Anyone familiar with this guy? Appreciate the time!