Inside Centropyxis

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cuxlander
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Inside Centropyxis

#1 Post by cuxlander » Tue Jun 23, 2020 5:42 pm

Hello Forum,

usually you observe disc shaped testate amoebae like Arcella or Centropyxis sitting flat on your glass slide, like this Centropyxis discoides:

Image

With some luck and glycerol I have been able to view the following two specimen from lateral. The next photos show some quite complex structural elements connecting dorsal and ventral shell, quite complex for a single-celler:

Image

Image

Diameters (from top) 240, 237 and 218 µm, Neofluar 40x, stacks of abt. 20 focal planes.

Cheers,
Hans

deBult
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Re: Inside Centropyxis

#2 Post by deBult » Tue Jun 23, 2020 7:32 pm

Nice work and a new view in a well known subject.

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75RR
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Re: Inside Centropyxis

#3 Post by 75RR » Tue Jun 23, 2020 7:59 pm

Those are great! It is quite true that we have been enjoying, in the main, just a single and therefore rather limited view of testate diatoms.

I had some unusual help when I managed a glimpse : viewtopic.php?f=6&t=7113&p

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Zeiss Standard WL (somewhat fashion challenged) & Wild M8
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Sabatini
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Re: Inside Centropyxis

#4 Post by Sabatini » Thu Jun 25, 2020 1:45 am

Good work.
Thanks

MicroBob
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Re: Inside Centropyxis

#5 Post by MicroBob » Thu Jun 25, 2020 5:22 am

Hi Hans,
very interesting post! These amoeba look quite different from the side from what I would have expected. And the complexity of these single cell organisms always astonishes me. My view of a cell is more the orderly onion skin cell that a structure like this! :lol:

Bob

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cuxlander
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Re: Inside Centropyxis

#6 Post by cuxlander » Sat Jun 27, 2020 6:23 pm

Hello,

thanks for your comments. Views which SEMs cannot provide. Here's another example:

Image Image.

Pontigulasia (= throat bridge) build internal bridges to prevent Rotifera from highjacking the shell.

Cheers,
Hans

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