Charles L. Powell what a nice surprise!!!!!!, I had read a lot of your pappers. I have more than 1000 specimens and it has been identified 70 species, but I am afraid that there are some misindentifications. Until now, the outcrops where these shells originate have provided the best preservation for the Pliocene of Mexico and the link between the Nicaragua and Baja California malacofauna. Can you provide me and e-mail to talk a little more about the proyect? By now I need help with the right identification of nine species but in a future I wil like to have all the species identified. I read about some of your recent works and I think that maybe part of the material that I have can be useful for you