One area that has little work done on it is the family of Cardium. It would be
wonderful for someone to truly put together a guide as Wes has suggested that
put description and shell together for those hard to i.d. specimens. Also, it
would be nice to know which are legitimate species and which a synonymns.
  Is anyone working on such a project. Harry Lee, if your out there, here is a
project that would be well worth a portion of your time and I'd be glad to
help as I am able to see this become a reality.