Diatom ID!

Images made through a microscope. All subject types.

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arturoag75
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Location: italy
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Diatom ID!

Post by arturoag75 »

Hi everybody,
do you know genera of this diatom?
best
arturo

obj.40x DIC illumination on Zeiss Photomicroscope III!
Image

BJ
Posts: 354
Joined: Sat Sep 29, 2007 10:53 am
Location: England

Post by BJ »

Hi Arturo,

a nice crisp photo.

I think that it is a species of Cocconeis.

It looks rather like the non-raphe valve of C. pseudomarginata (which is marine) . I do not think that it is actually this species, but something similar.

I think René will be the best one to name this for you.

regards

Brian

René
Posts: 467
Joined: Sun Oct 08, 2006 4:22 am

Post by René »

Ha! I'm mostly into planktonic stuff, and this is surely not something in the watercolumn. And I have never seen it. But I think BJ is right, C.pseudomarginata comes close. You can see the raphe on the other side, out of focus.
Images in Witkowski show it with a clear ridge, which is probably lost here during stacking. Real shame to lose infomation like this. Hopefully, with the introduction of 3D screens this will be taken on board...

Well spotted, Brian!

Rene

ps, check the diatom loir site at http://www.diatomloir.eu/Site%20Diatom/ ... odeux.html
A good detail image of the raphe could get us closer

arturoag75
Posts: 1600
Joined: Fri Feb 05, 2010 1:05 am
Location: italy
Contact:

Post by arturoag75 »

Brian , Renè,
many thanks for your help!
best days
Arturo

Jean-marc
Posts: 274
Joined: Sat Oct 06, 2007 2:57 pm
Location: France

Post by Jean-marc »

Hi Arturo,

Beautiful !

JM

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