A few new amoeba tests

[Charles Krebs]

As always, I am fascinated by the tests created by these amoeba species. A couple weeks ago I squeezed out some mosses that I had collected into a smaller container. Now I get a pretty good assortment of testate amoeba from the sediment in that container. Here are a few...

[beetleman]

Excellent pictures, Incredible subjects...what is going on in the third picture? Is that one animal?

[bernhardinho]

.what is going on in the third picture? Is that one animal?

Hi,

I'm sure this is cell division, which is part of the answer to a question that Charles put the other day: how do testacea build their "houses"?


Bernhard

[Gyrosigma]

hello everybody,
not sure about cell division, I think it's "conjugaison" (I hope this french word is the same in English...)

division weakens the genetic structure of the cells , so after a moment...

the two Cyphoderia are melting there genetic material to begin a new cell wich will be regenerate.

you can see in an animation made by a friend of mine Jean Marie Cavanihac what's append on Mikroscopia, the french forum http://forum.mikroscopia.com/index.php? ... ic=1373&hl

best regards

Dominique

[beetleman]

SO, this is two testate amoebas, joined together, and mixing genetic material to form a new individual? Does one amoeba have the new individual or do both have one? Sorry for all the questions

[bernhardinho]

hello everybody,
not sure about cell division, I think it's "conjugaison" (I hope this french word is the same in English...)
Dominique

Hi Dominique,

Conjugation is a form of mating in ciliates only, I've never ever read about Testacea performing anything else than cell division.

Bernhard

[bernhardinho]

Hi again,

I've scanned a page from Grell: Protozoologie.




Bernhard

[Gyrosigma]

OK Bernhard,
you are certainely right.... I will tell my french friends about this...

best regards

Dominique