Hi, Conch-L!
Well, I think I may have a handle on the Pteria that I've been trying to i.d., and Peggy Williams mentioned what I think may be thre same. Pteria longisquamosa - mine is only an inch and doesn't have "spines" as long as the picture iin the Compendium. However, it is quite fragile, so it may be a young specimen. MY QUESTION IS: can this shell be a bright spring green? Mine is.
Thanks,
Linda - can't wait for Sarasota