Very rare, amoeba? Aletium?

carlos.uruguay · Post by **carlos.uruguay** » Sun Jan 27, 2013 6:51 pm

Fresh water, phase contrast
Link:
http://www.youtube.com/watch?v=SIh5D9MPQQ4
But aletium lives in salt water
Regards
carlos

Bruce Taylor · Post by **Bruce Taylor** » Tue Jan 29, 2013 10:48 am

A very interesting creature, recorded with admirable clarity!

I can't help with the ID, but am curious to hear what Ferry says. As I understand it, these naked filose/reticulose amoeboids are very troublesome.

I think Aletium is not a likely candidate. While the species A. pyriforme appears as a brief, and cryptic, entry in the ISOP guide, as well as EOL and the starcentral sites, all of these are derived from the only formal description, in an article by Alexander Schepotieff, published in 1912: http://www.biodiversitylibrary.org/item ... 8/mode/1up

His creature, as described in pp. 378-80 and depicted in Plate 19, figs. 16-34, seems to be quite a different organism.

From the plates accompanying that article:

carlos.uruguay · Post by **carlos.uruguay** » Tue Jan 29, 2013 11:11 am

Hi Bruce.
Thank you for this interesting text!
I suggested aletium because your you've mentioned in a very similar amoeba
The Amoeba of the video seems to have a subtle flagellum at the anterior end
I also thought that could be Biomyxa vagans
We hope to see that Ferry said
Regards!
carlos

Bruce Taylor · Post by **Bruce Taylor** » Tue Jan 29, 2013 11:24 am

carlos.uruguay wrote:Hi Bruce.
Thank you for this interesting text!
I suggested aletium because your you've mentioned in a very similar amoeba

Yes, I remember that organism. I think my suggestion was a poor one.

The Amoeba of the video seems to have a subtle flagellum at the anterior end

I was interpreting that as a filopodium...but I have very little experience with these creatures.

While you're waiting for more knowledgeable comments

, you might be interested in an article: http://www.ncbi.nlm.nih.gov/pubmed/18952499

carlos.uruguay · Post by **carlos.uruguay** » Tue Jan 29, 2013 11:37 am

Thank you again Bruce
Is true, it is more like a filopodio
I do not have experience either
Very interesting text!
Regards
carlos

Ferry · Post by **Ferry** » Wed Jan 30, 2013 3:57 pm

Indeed a very strange amoeboid. Never seen something like that. It seems to have a flagellum and more remarkable one or more very thin straight lines inside, probably microtubuli. Also remarkable the very minute granules (extrusomes?) just beneath its membrane. I think upon some Mastigamoeba. I will scan my literature tomorrow... It could also be a fragment of something bigger, I can't see any nucleus.

Cheers,
Ferry

carlos.uruguay · Post by **carlos.uruguay** » Wed Jan 30, 2013 9:47 pm

Thank you Ferry.
I wait enthusiastically for your opinion and your advice (council) to collaborate in the identification
It does not seem to be a part of another organism. If stage of one
Regards
carlos
Pd. In the 'central' area the nucleus should be observed, but the olympus phase of fluorita is a very bad objective

Ferry · Post by **Ferry** » Thu Jan 31, 2013 7:59 am

Hi Carlos,
These features are important:

Very thin and straigth line(s)

Possibly a flagellum

BUT... I couldn't find any aditional information. So only its beauty remains...

Cheers, Ferry

Bruce Taylor · Post by **Bruce Taylor** » Thu Jan 31, 2013 10:15 am

Ferry wrote:BUT... I couldn't find any aditional information. So only its beauty remains...

Thank you, Ferry.

Maybe Carlos will encounter more specimens, and add to the store of information on this oddity.

Ecki · Post by **Ecki** » Thu Jan 31, 2013 11:19 am

This looks like a Cercomonas species.

Regards
Ecki

Ferry · Post by **Ferry** » Thu Jan 31, 2013 2:00 pm

Carlos, uhhh.. 400x? But how long was it in µm?

carlos.uruguay · Post by **carlos.uruguay** » Thu Jan 31, 2013 9:13 pm

Hi Ferry, Ecki, Bruce
Ferry, It measured approximately 250um in length
Ecki, Interesting suggestion, I have seen that certain cercomonas have a status of plasmodia ... i'll look for references
Bruce: I will try to find and film other similar organisms
carlos

Ferry · Post by **Ferry** » Fri Feb 01, 2013 2:22 am

Carlos,
Thanks, that is much better for getting a mental image. That should be far too large for a Cercomonas, which also has two flagellae and I can't imagine that the second one, which is usually trailing under the body, is the straigth line. It's really weird but exciting....

carlos.uruguay · Post by **carlos.uruguay** » Sat Feb 02, 2013 3:08 pm

Thanks to you Ferry. I am trying to find again this rare organism
For the time being without luck.
I find similar to this one:
http://www.youtube.com/watch?v=qKBdD3YfhV8
But much less active
But I do not remember if this last lived in saltwater
carlos

Ferry · Post by **Ferry** » Sun Feb 03, 2013 1:59 pm

I always wonder which forces make these organisms move the way they do... Really amazing.