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Diatom and Amoebidae?

Posted: Wed Jul 10, 2019 7:22 am
by 75RR
The diatom (as yet unidentified), is about 65┬Ám width, Marine sample, Alboran Sea

There appear to be kinetocysts traveling along axopodia within the diatom


Re: Diatom and Amoebidae?

Posted: Wed Jul 10, 2019 9:44 am
by mrsonchus
Superb details 75' - so much more to ponder than the empty shell.
I'm off to have a look into the details - you've gone and got me all interested you blighter! :D

The similarity to intracellular transport (the ubiquitous microtubule?) of plant cells is obvious too!

I don't suppose you could add to this 75' - it really is truly fascinating.

Re: Diatom and Amoebidae?

Posted: Wed Jul 10, 2019 10:08 am
by 75RR
Thanks mrsonchus

have a stack that shows the shape of the frustule with more detail than was apparent in the video.

Curiously, it has chamfered corners (one would have thought that would help with the ID but no luck yet)

Re: Diatom and Amoebidae?

Posted: Wed Jul 10, 2019 12:15 pm
by Hobbyst46
75RR wrote:Curiously, it has chamfered corners (one would have thought that would help with the ID but no luck yet)
Hi 75RR,

I think that the diatom might be: Striatella unipunctata
Please see Fig 1 of
https://mmbr.asm.org/content/76/3/667
IMO the image and video you posted are at least as fine as those in the article,
Yet, is it really composed of two creatures ? perhaps, if it could be inverted, upside-down, so the "dorsal" or "ventral" side was visible...

Re: Diatom and Amoebidae?

Posted: Wed Jul 10, 2019 1:14 pm
by 75RR
Many thanks Hobbyst46
I think that the diatom might be: Striatella unipunctata
Great catch!

http://nordicmicroalgae.org/taxon/Stria ... tata_1.jpg
+ fantastic link on "Interactions between Diatoms and Bacteria" Plenty to digest there

Re: Diatom and Amoebidae?

Posted: Wed Jul 10, 2019 2:37 pm
by MichaelG.
75RR wrote:... have a stack that shows the shape of the frustule with more detail than was apparent in the video.
That's a lovely image ... and the video action is amazing.

MichaelG.

Re: Diatom and Amoebidae?

Posted: Thu Jul 11, 2019 4:43 pm
by Wes
This is amazing! To see directional movement of particles inside the cell like you show is incredible. Also the stack is beautiful. Thanks for sharing 75RR.

Re: Diatom and Amoebidae?

Posted: Thu Jul 11, 2019 7:55 pm
by 75RR
Many thanks MichaelG. and Wes

and thanks again to Hobbyst46 for the diatom ID and for solving the mystery