Hi everyone,
     I recently found a few clams in western Mexico (near Puerto Vallarta)
     that I'm having trouble identifying. They look very similar to the
     Macrocallista maculata (Linne 1758) aka the Calico Clam - they have
     very similar coloring, shape, etc. I suspect they are Megapitaria
     squalida (Sowerby, 1835). I've been using A. Keen's Sea Shells of
     Tropical West America and Abbott's Compendium and American Seashells.
     But I'm still not sure! Any ideas? If you are, please email me at:
     [log in to unmask] Thanks!
     Sue in Denver