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Testate Amoeba for ID

 
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pjoris



Joined: 04 Jan 2012
Posts: 30

PostPosted: Sat Jan 14, 2012 10:56 am    Post subject: Testate Amoeba for ID Reply with quote

Still having difficulty identifying what I'm photographing. Is this an Euglypha ? Joris

Olympus Splan 20x (flash)


Olympus Splan 40x (flash)
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Charles Krebs



Joined: 01 Aug 2006
Posts: 5805
Location: Issaquah, WA USA

PostPosted: Sat Jan 14, 2012 12:52 pm    Post subject: Reply with quote

Joris,

There are others here that are much better than I am at identifying these but I do believe is it a Euglypha.

One place I always check when I am trying to search out an ID for these is here:
http://user.xmission.com/~psneeley/Personal/FwrPLA.htm
Leidy did some amazing work 134 years ago.

Have a look at Plate 35 (XXXV) and in particular #14:
http://user.xmission.com/~psneeley/Personal/Fwr35P.htm

Caption here:
http://user.xmission.com/~psneeley/Personal/Fwr35K.htm
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pjoris



Joined: 04 Jan 2012
Posts: 30

PostPosted: Sun Jan 15, 2012 3:30 am    Post subject: Reply with quote

Thanks, I'm glad to hear I wasn't way off with my ID.

Beautiful plates from Leidy's work - a reminder you don't need the latest optics and digital camera's to make good observations. I will try to look more through the microscope first and then take pictures - probably the better way to learn to ID these organisms ...

One other question: am I seeing the amoeba itself somewhere ? Is it the cell in the back of the shell (which seems to have a nucleus) or in the front, or is the amoeba deceased ?

Joris
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Charles Krebs



Joined: 01 Aug 2006
Posts: 5805
Location: Issaquah, WA USA

PostPosted: Sun Jan 15, 2012 1:30 pm    Post subject: Reply with quote

Amoeba can "encyst" and become dormant when conditions are poor, and become active again as their environment improves. The cell is in the back of the test.

Although this reference is not for testate amoeba, you can read a little more about this process here:

http://tinyurl.com/759njmf
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