Thank you, all.

So, at this time, I register this Scapho as a tetra, and notice the 
little discussion about the possible presence of a second species of 
Entalina proposed by Forbes, not validated yet.

Great help, friends!

Cheers

Olivier

Le 01/05/2015 11:43, Arie Frans de Jong a écrit :
> Dear Oliver (Jan and Hans),
>
> Hans Post forwarded your e-mail to me. I agree with Jan. According to 
> its location, size, striation an rather strong curve, this must be 
> Entalina tetregona (Brocchi, 1814).  I only know Entalina tetragona as 
> well angled, however there is some discussion about the status of a 
> second taxon of Entalina in the Mediterranean, named  Entalina 
> quinquangularis of Forbes, 1844. This shell should be pentagonal, with 
> five angles: the original description states "pentagulari". I never 
> saw specimens of this species, and to be honest;  most researcher, 
> like WoRMS,  synonymised quinquangularis with tetragona.
> So interesting, but most likely an unusual round E. tetragona.
>
> Best regards,
> Frans
>
>
>
>
>
> Frans de Jong
> Research associate
> Intensive care volwassenen
> Erasmus MC University Hospital Rotterdam
> Private address: Hendrikstraat 54
> 3314 ZM DORDRECHT
> The Netherlands
> T        +31651057514
> E         [log in to unmask]
> W        http://www.fransdejong.eu
>
>
>
>

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