Dear Aydin,
I'm contacting you through te list-serve since the problem you pose is actually of great geberal interest (or so I think).

I be;ieve the ideal experimental model is Amphidromus (Amphidromus) perversus (Linnaeus, 1758); see <http://www.jaxshells.org/052ddr.htm>. Not only is the species enantiomorphic (L/R ca. 0.5), it is available in commercial quantities.

I'm away from my "lab" for another day or two, but you can contact me there later this week for possible sources.

Harry


-----Original Message-----
>From: aydin <[log in to unmask]>
>Sent: Jan 14, 2011 6:17 PM
>To: [log in to unmask]
>Subject: [CONCH-L] Dextral & sinistral shells needed
>
>I need about 200 dextral & 200 sinistral shells of either a land snail or a
>freshwater snail species. The shells should be larger than about 10 mm in
>their largest dimension. There could be 2 or more species as long as there
>are about 200 shells of each coiling direction and the shells of all spp.
>are morphologically & dimensionally similar.
>I need the shells for a field experiment. Therefore, locality data are not
>needed. But the shells should be in reasonably good condition.
>I am wiling to pay a reasonable fee for the shells.
>If you think you can supply me with this material, contact me privately at
>[log in to unmask] To help me recognize your e-mail in the spam
>filter, put "snail" in the subject line.
>
>Aydin
>snailstales.blogspot.com
>
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