There are no deep water nerites to date.  There is one widespread (Pacific)
monotypic genus Pisulina (or something like that, help me out, Harry) that
lives in slightly deeper water than the norm, but still shallow.
Personally, I don't really think it should be assigned to the Neritidae.  I
think it's a real weird naticid, but who knows at this point?

There are many endemic species of marine, brackish and freshwater habitats
in small island groups in the Pacific.  Most of these have been relagated
to the synonomies of more widespread species.  Quite a few of these should
be recognized and easily are on the basis of shell morphology alone.

Harry, what was that species I got on Palau?  This a very good example of a
large (over 1 inch) endemic species usually placed with Nerita undata but
clearly different.

Kurt

At 10:58 AM 9/1/99 +1000, you wrote:
>Dear James (and others),
>
>Being intertidal (and brackish/freshwater) herbivores I doubt that any
>netires are rare. Some might be a little less common than others. Such a
>species is probably Smaragdia tragena, which is never commonly encountered.
>but to call it rare would be a gross overstatement.
>
>My question to the group:
>In several of the (previous) Archaeogastropods and related primitive
>gastropods, such as the Neritidae, the large bulk of the species are from
>shallow water. However, more recently species of these families have been
>discovered from very deep water and abyssal depths beyond comprehension
>(hydrothermal vents). This is especially the case in the Fissurellidae.
>Does anyone know if any deep water Nerites have been discovered?
>
>Patty
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