They generally look like cerithioideans such as Semisulcospira, Hua,
etc.  Probably Semisulcospiridae (aka Jugidae, not validly proposed;
sometimes considered a subfamily  of Pleuroceridae or incorrectly
grouped with other freshwater cerithioideans), but other freshwater
cerithioidean families are present in southeast Asia and might
possibly range into China.  The genera are not well sorted out at
present.

On Thu, Nov 25, 2010 at 3:36 AM, He Jing <[log in to unmask]> wrote:
> I got some freshwater shells from Yunnan Province China. They are buried
> in mud for at least 600 Years. Any ID help will be appreciated.  Please e-
> mail [log in to unmask]
>
> Click the link below to view the shells
>
> http://www.shellspecimen.net/Article_View.asp?id=15
>
>
> Best Regards
>
> He Jing
>
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--
Dr. David Campbell
The Paleontological Research Institution
1259 Trumansburg Road
Ithaca NY 14850

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