A "What is it?" (Edit: Answer posted!)

Images made through a microscope. All subject types.

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Charles Krebs
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Location: Issaquah, WA USA

A "What is it?" (Edit: Answer posted!)

Post by Charles Krebs »

Last edited by Charles Krebs on Tue Nov 13, 2012 1:32 am, edited 1 time in total.

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Post by René »

Arcella in mucus? Or something from the vacuum cleaner?

Best wishes, René

Charles Krebs
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Joined: Tue Aug 01, 2006 8:02 pm
Location: Issaquah, WA USA

Post by Charles Krebs »

And the answer is.....
the cyst of a very large ciliate, Bursaria truncatella.

I had found 3 specimens in a collected sample and moved them into a petri dish. I put one on a slide and took a few shots and tried some video. Here's the one I photographed.


When I went back the next day to work with the other two, it was obvious they were undergoing a transformation so I left them alone. When I checked the following day they were fully encysted and this is the "quiz" image. The petri dish had adequate water (from the collected source) but it was clear water, with no visible food for the Bursaria. I found it to be a stunning transformation.

The video turned out to be a half-hearted attempt since I was set up intending to take flash shots of these constantly moving subjects. Unfortunately the viewing LED my flash "module" will not give me even illumination for a 4X in darkfield (10X and up is fine) so there are segments in the video where the lighting is poor.... very uneven. But they are fascinating ciliates so I posted it up on YouTube for those who have never seen one in action.


I've posted pictures of several of these over the years, and some of these can be seen here:

http://www.photomacrography.net/forum/v ... php?t=4329
http://www.photomacrography.net/forum/v ... php?t=6243
http://www.photomacrography.net/forum/v ... php?t=4286

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Post by Jacek »

all you do is beautiful

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Post by Ecki »

Nice darkfield shots.

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Post by arturoag75 »

Amazing Charlie!
this is a rare example of darkfield!

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Post by RogelioMoreno »


Beautiful and amazing!


Wim van Egmond
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Post by Wim van Egmond »

That is really surprising. Patience rewarded. And a very nice video!


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