All right, here come some more questions; I am progressing each day on my pecten recataloguing. IS Proteopecten (valid genus?) proteus a subspecies of glaber, same genus (I am not including full scientific name, as I figure most of you who are "into" pectens know what I am talking about) It certainly has fewer ribs than glaber. I have a nice big brown one that I got from a dealer recently (proteus, that is) that shows all of the characteristics very well. What do you think or know? Linda, the pecten afficianado