Has anyone ever seen this?

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Olympusman
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Has anyone ever seen this?

Post by Olympusman »

Found in pond water. I was able to rotate it by tapping the cover glass with a teasing needle so you can see the backside. It looks like bubbles, but they are firm. There is a diatom inside.

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Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

Ken Ramos
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Post by Ken Ramos »

Just a wild guess but how about an encysted protist of some sort, maybe one having ingested a diatom prior to? :smt102

Protos
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Post by Protos »

reminds me of some heliozoan without spicles

Olympusman
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It's a heliozoan

Post by Olympusman »

Actinophrys sol New image showing spines

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Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

Ferry
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Post by Ferry »

It is Actinosphaerium eichhornii... probably

Olympusman
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Heliozoan

Post by Olympusman »

Ferry,
Thanks, but I'm sticking with Actinophrys sol.
The samples of Actinosphaerium eichornii shown at http://protist.i.hosei.ac.jp/pdb/images ... index.html do not exhibit the bubble-like structure and also appear to captured at a high magnification. My samples are quite large and are captured with a 10x objective.
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

Bruce Taylor
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Post by Bruce Taylor »

Michael, you can probably trust Ferry's eye when it comes to the "heliozoa." ;) With Roijackers, he did a lot of pioneering work on these organisms in the 80s and 90s, and knows as much about them as anyone alive.
It Came from the Pond (Blog): http://www.itcamefromthepond.com/

Ferry
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Post by Ferry »

Actinophrys sol is small compared with Actinosphaerium, which can be up to 2600 microns!
See http://www.arcella.nl/actinosphaerium-eichhornii

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