Yes Harry, I agree it's not a Raphitomid.

I discover the genus Thala in Costellariidae (Paul Callomon was right 
when he proposed first to check this family). So for this white shell, 
maybe it 's a juvenile of Thala cernica (Sowerby II, 1874). And the 
purple shells belong to Kermia pumila, OK.


Olivier


Le 03/07/2015 00:05, Harry Lee a écrit :
> Dear Olivier,
>
> I think it's possible that your Reunion shell is not a Kermia or even 
> a Raphitomid.
>
> Are we dealing with homoplasy (convergent teleoconch morphology, e.g., 
> <https://listserv.uga.edu/cgi-bin/wa?A2=ind1401A&L=CONCH-L&P=R7028&X=93EEC005C692EDB882&Y=shells%40hglee.com>) 
> or didymy (lecithotrophy/planktotrophy conversion, e.g., 
> <https://listserv.uga.edu/cgi-bin/wa?A2=ind0310B&L=CONCH-L&P=R4488&X=93EEC005C692EDB882&Y=shells%40hglee.com>) 
> here?
>
> A third alternative: I'm all wet!
>
> Harry

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