>I don't know of a website, but Tucker Abbott's Compendium of Landshells
>illustrates about 3 dozen "species" of Cerionidae.  He says over 600
>species have been described, "but all but about a dozen are merely local
>subspecies or colonial distincts."
 
The illustrious Stev(ph?)en  J. Gould works on these babies and has
published numerous articles in Natural History and scientific journals
(mostly with David Woodruff on genetics, etc.).  The jury is still WAY out
on how maybe 'true' species (whatever that means) are involved.
 
>
>He also mentions that several Bahama forms were introduced to the Florida
>Keys but that they must have hybridized with the native C. incanum.
>Shelling in the Keys in the late 1960's I found one of these hybrids. I
>didn't know what I had, of course, being brand new to shell collecting, (we
>were actually on our honeymoon at the time) but years later Walter Sage,
>former collections manager at the AMNH, told me what it was and that it was
>Dr. Paul Bartch (USNM)  who tried settling the various Bahamian forms on
>the Keys. He was a bit indignant over Bartsch's experiment and felt it was
>ecologically unsound. Does anyone know more about this?
 
Yes, Paul Bartsch transplanted several Bahamian Cerion forms on some
isolated Florida Keys.  He then revisited the sites over a period of years
and wrote up the results in several notes and papers.  Most of this
information is briefly synthesized in Pilsbry's treatment of the genus in
the Land Mollusca of North America (North of Mexico) series, Academy of
Natural Sciences of Philadelphia, ser. 3.
 
Kurt
 
>
>Lynn Scheu
>[log in to unmask]
>Louisville, KY
>