small Stentor (Protozoan)

Images made through a microscope. All subject types.

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NikonUser
Posts: 2676
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

small Stentor (Protozoan)

Post by NikonUser »

EDIT: title changed from "Protozoa for ID"
This colourless freshwater protozoan rotated while swimming.
I would appreciate getting an ID.
Length 0.21 mm

Olympus BHS DIC 20x S Plan Apo, 1.25x intermediate lens, 2.5x NFK relay lens, Nikon D90, flash.
Image
Last edited by NikonUser on Wed Dec 15, 2010 6:35 pm, edited 1 time in total.
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

john sp.
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Joined: Sat Oct 23, 2010 3:55 pm
Location: Tennessee, USA

Post by john sp. »

Looking at this photo, I'm reminded of Arturo's Stentor photo with its "string of pearls" nucleus.

http://www.photomacrography.net/forum/v ... hp?t=11125

John

NikonUser
Posts: 2676
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Post by NikonUser »

Thanks John, yes looks very close.

A lot different from the much larger, colourful, Stentor sp. (spp.) that I see lots of
AS HERE
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Mitch640
Posts: 2137
Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

So this is a stentor? Is this looking down his throat? I'm wondering about all the cilia on the sides.

john sp.
Posts: 42
Joined: Sat Oct 23, 2010 3:55 pm
Location: Tennessee, USA

Post by john sp. »

If we are right about this being a stentor, it would appear to be in its free-swimming mode. I would assume that the oral area would be towards the upper right.

DIC gives a very strong cross-sectional view, and since what appear to be the nuclei are so visible, this is probaby a mid-depth view. The part that puzzles me somewhat is the area that is also towards the upper right, just inside the cell. I'm assuming that this is part of the "mouth", but I can't work out the 3D image enough to place it.

Stentors are ciliated, beyond what readily is seen around the oral zone. If you look at the earlier picture that NU links to (his green stentor), as well as Arturo's photos that I link to, you can see how the surface is covered with rows of cilia. The present image does a nice job of highlighting them at the edge of the cell.

Mitch640
Posts: 2137
Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

John, yes, I remember those images, but not any cilia on the body, other than the mouth perimeter. I would assume the body verticle lines would be rows of cilia, but in those shots the cilia themselves were not visible. Interesting. :)

NikonUser
Posts: 2676
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Post by NikonUser »

john sp. wrote:I I'm assuming that this is part of the "mouth", but I can't work out the 3D image enough to place it.
John, this guy was certainly a free-swimming stage; very active and lots of rotating; never got a shot of the oral surface but here are a couple of other images:
Image
NUM10128
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Mitch640
Posts: 2137
Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

There's those faces again. I didn't want to mention it, but.....

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