various microorganisms

Jacek · Post by **Jacek** » Sun Dec 30, 2012 1:48 pm

arturoag75 · Post by **arturoag75** » Mon Dec 31, 2012 1:08 am

Great quality and details on your shots

Jacek · Post by **Jacek** » Mon Dec 31, 2012 3:10 am

Thank you arturoag75

Bruce Taylor · Post by **Bruce Taylor** » Mon Dec 31, 2012 6:40 pm

Extremely beautiful images!

That first ciliate might be an Ophryoglena.

Jacek · Post by **Jacek** » Wed Jan 02, 2013 5:46 am

Thank you very much Bruce

Ophryoglena - I can not find any description, you can put a link?

Bruce Taylor · Post by **Bruce Taylor** » Wed Jan 02, 2013 7:27 am

From Colin Curds et al, 1983:

Medium- to large-sized ciliate, oval to pyriform in outline,
transparent. The oral aperture is situated in the anterior quarter of the body,
and is characteristically the shape of the concha of the right human ear with a
small posterior projection similar to the tragus of the ear. The buccal cavity
contains an undulating membrane and three membranelles which are
arranged helically. On the left of the oral aperture there is a refringent body,
shaped like a watch glass, often with a pigment spot on its convex side. The
spot is green-yellow in life and stains deeply with iron haematoxylin and
safranin and its location is used as a character for the identification of the
species. The somatic ciliation is dense with many kineties running longitudinally
down the body (except in one species where they spiral, Canella and
Rocchi-Canella, 1976). There is a definite pre-oral suture. One or two
contractile vacuoles open laterally to the right of the oral aperture. The
macronucleus is circular or elliptical in outline, strongly flattened and more
or less folded on itself. Careful observation is required not to attribute a
sausage or horseshoe shape to the nucleus of this genus.

http://starcentral.mbl.edu/microscope/p ... phryoglena

https://www.youtube.com/watch?v=pwJjeoMJ3tk

And from Rogelio Moreno:

https://www.youtube.com/watch?v=pwJjeoMJ3tk

Your ciliate strikes me as likely to be Ophryoglena because of the location of the cytostome and its shape in profile. The often-mentioned "hourglass organelle" is only visible at certain depths of focus, so its absence in your excellent image is not significant (for instance, in the video above, it only appears very briefly, at 0:06).

Jacek · Post by **Jacek** » Wed Jan 02, 2013 10:39 am

Once again, thank you very much Bruce