Marcus,

If you have a copy of The Mollusks: A Guide to Their Study, Collection,
and Preservation edited by Sturm, Pearce, and Valdes you will find a map
showing the approximate boundaries of marine biogeographical zones on page
115, and a map for non-marine biogeographical zones on page 117.

The zones are approximations. Environmental factors can change periodicaly
and these will allow the boundaries of these zones to shift a bit. Also,
biogeographical zones can be defined differently for different groups of
organisms. The zones that I choose to use in the book were the ones most
people used as the general zones and ones that seemed to apply to
mollusks.


> I remember some time ago a discussion was placed here about World
> geographic regions for shell
> distribution  (Caribbean, Patagonian,  etc.).
>
> Is there a recent list available somewhere?
>
> thanks
>
> Marcus
>
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Regards,
Charlie
.................................................
Research Associate - Section of Mollusks
Carnegie Museum of Natural History
Pittsburgh, PA, USA

Assistant Professor - Family Medicine

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