Olivier,

Your might want to try the following paper:
Petit, R. E. and M. G. Harasewych. 1990. Catalogue of the Superfamily
Cancellarioidea Forbes and Hanley, 1851 (Gastropoda: Prosobranchia). The
Nautilus. Supplement 1: 69pp. Dick Petit has spent years studying the
Cancellariidae.

Regards,
Charlie
******************************************************************************
Charlie Sturm, Jr
Research Associate - Section of Mollusks
                     Carnegie Museum of Natural History
                     Pittsburgh, PA, USA

Assistant Professor - Family Medicine

[log in to unmask]


On Tue, 15 Feb 2005, Olivier Caro wrote:

> Dear List
>
> I cannot see any difference between
> Cancellaria (Cancellaria) indentata Sowerby, 1832 forma cremata Hinds, 1843
> and
> Narona jayana Keen, 1958.
> The spire is higher than indentata's one, says Keen's book. Ok, but then, a very little bit higher ; the number of axial ribs is variable, the shoulders are less or more angulate, the color is perfectly cremata in both cases... so what ?
>
> And is there somewhere a definitive and final systematic of Cancellariidae?
> Who is Cancellaria, who is Bivetiella, who is a true genus and who is a false subgenus etc?
>
> You can load three pics of these 2 or 3 species from the useful site gastropods.com. I give here their links:
> http://www.gastropods.com/Shell_Images/ThumbNails/A-Con/TN_Cancellaria_indentata_1.jpg
> http://www.gastropods.com/Shell_Images/ThumbNails/A-Con/TN_Cancellaria_indentata_cremata.jpg
> http://www.gastropods.com/Shell_Images/ThumbNails/L-n/TN_Narona_jayana.jpg
> Copy them on your desktop and meditate... meditate... meditate...
>
> Thanks, many many thanks for:
> 1- your usual and talented assistance
> 2- your ideas and recommendations
>
> Olivier Caro

----------------------------------------------------------------------
[log in to unmask] - a forum for informal discussions on molluscs
To leave this list, click on the following web link:
http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
Type your email address and name in the appropriate box and
click leave the list.
----------------------------------------------------------------------