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Found this years ago in the Loire Valley in France. Any information about age/species would be great to have. Thanks!

Hi all, Here are 11 different shells, bivalves and gastropods, that I would like to be able to ID down to species level. I got them in a little bag full of these little shells, . I have a decent idea of the genus of most, but I'm lost as to when it comes to species. The shells are all from Ferriere-Larcon, Loire, France. It says on the label that they are from the "Falun de Pontelivien" ("falun" translates to "shelly", as in "shelly layer", referring to the main components of the layer: fossil shells), and that they are from the Serravallian stage of the Miocene (approx 12 mya). These are just 11 of the different species, from about an estimate of 40 different ones. These are the ones I am most interested in IDing for now. But, if you maybe have a document or so with a list or plates of all the possible species from this location/formation, that would be even better! In case better pictures are needed, let me know. Thanks in advance for the help, Max #1: Cardita sp (species... ?)