Search found 832 matches

by Bruce Taylor
Sun Sep 11, 2022 5:03 am
Forum: Photography Through the Microscope
Topic: Centropyxis aculata
Replies: 2
Views: 204

Re: Centropyxis aculata

Great pic! This is Netzelia corona. See: https://arcella.nl/netzelia-corona/ C. aculeata is quite flattened, in lateral view, with an offset aperture: https://arcella.nl/wp-content/images/Ce ... a-90um.jpg
by Bruce Taylor
Sat Aug 13, 2022 6:19 am
Forum: Photography Through the Microscope
Topic: Can you help me identify this ciliate?
Replies: 4
Views: 281

Re: Can you help me identify this ciliate?

It is not Chlamydodon (a marine ciliate). That genus has a distinctive "traintrack" around the perimeter of the cell, but it is colorless, whereas this is green. Also, if you look closely, you'll see that it is a coiled strand of cyanobacteria, with a free end poking out at the lower right side (ano...
by Bruce Taylor
Wed Jun 22, 2022 5:37 am
Forum: Photography Through the Microscope
Topic: Some amoebas
Replies: 5
Views: 560

Re: Some amoebas

Bubbles are indeed normal in Arcellidae. Gas bubbles enable the organism to lift itself from the substrate into the water column, where it can float to a new location. See: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1550-7408.1991.tb04441.x?casa_token=VzsKFDz_MbMAAAAA:VnNPws8NEllqEvF8PvUIwDK9...
by Bruce Taylor
Wed Jun 22, 2022 5:31 am
Forum: Photography Through the Microscope
Topic: Jumbo
Replies: 3
Views: 706

Re: Jumbo

Very nice!. It is Holophrya (a "histophage," i.e. "tissue eater.")
by Bruce Taylor
Wed Jun 22, 2022 5:26 am
Forum: Photography Through the Microscope
Topic: ID help for fugitive from Stentor Coeruleus
Replies: 8
Views: 817

Re: ID help for fugitive from Stentor Coeruleus

dahyon wrote:
Sun Jun 19, 2022 10:44 am
Hi
They look like Arcella tests to me.
I can see why you think that, but they are not Arcella (or any arcellinid). In the attached video, they appear to be spherical, not discoid or campanulate, and we see no sign of any pseudostomal aperture. They are too small, as well.
by Bruce Taylor
Mon May 30, 2022 1:49 pm
Forum: Photography Through the Microscope
Topic: ID help for fugitive from Stentor Coeruleus
Replies: 8
Views: 817

Re: ID help for fugitive from Stentor Coeruleus

Nice video! This is not my area of expertise, but I wonder if the fugitives are things that the Stentor sucked in, could not digest, and is now getting rid of. This is exactly right. The video shows ingested matter being ejected from the Stentor's excretory pore (cytopyge). I don't know what the li...
by Bruce Taylor
Mon Apr 18, 2022 4:09 pm
Forum: Photography Through the Microscope
Topic: Can you help me identify this ciliate?
Replies: 1
Views: 376

Re: Can you help me identify this ciliate?

Nice video! :) It's a species of Frontonia (most likely F. leucas).
by Bruce Taylor
Fri Apr 01, 2022 5:07 am
Forum: Photography Through the Microscope
Topic: dinoflagellate?
Replies: 3
Views: 537

Re: dinoflagellate?

This is a ciliate of some kind. The shape doesn't look natural, to me. I suspect it's a damaged spirotrich.
by Bruce Taylor
Fri Apr 01, 2022 5:05 am
Forum: Photography Through the Microscope
Topic: Can you tell me what specimen it is? Is beautiful
Replies: 2
Views: 484

Re: Can you tell me what specimen it is? Is beautiful

Bruce Taylor wrote:
Thu Mar 31, 2022 5:11 pm
I believe it is a species of Acoelomorpha, a marine group that used to be included among flatworms, but is now known to be distinct from platyhelminthes. They have ciliated bodies, and a small circular organ called a "statocyst", which I think we see here in the anterior of the organism.
by Bruce Taylor
Thu Mar 31, 2022 5:11 pm
Forum: Photography Through the Microscope
Topic: Can you tell me what specimen it is? Is beautiful
Replies: 2
Views: 484

Re: Can you tell me what specimen it is? Is beautiful

I believe it is a species of Acoelomorpha, a marine group that used to be included among flatworms, but is now known to be distinct from platyhelminthes. They have ciliated bodies, and a small anterior organ called a "statocyst", which I think we see here in the anterior of the organism.
by Bruce Taylor
Mon Mar 07, 2022 2:32 pm
Forum: Photography Through the Microscope
Topic: Stentor ?
Replies: 2
Views: 419

Re: Stentor ?

Yes, Stentor pyriformis. Very nice!
by Bruce Taylor
Sat Nov 20, 2021 5:40 pm
Forum: Photography Through the Microscope
Topic: Protist ID please
Replies: 2
Views: 598

Re: Protist ID please

Hi Michael. This is likely Holophrya ovum (= Prorodon viridis , in older sources), a rotund ciliate with algal endosymbionts. In the second image, we have a top view of the mouth with its surrounding basket of nematodesmata (stiff microtubular rods that support the cytostome). Here's a view of the s...
by Bruce Taylor
Tue Sep 21, 2021 8:07 pm
Forum: Photography Through the Microscope
Topic: Soil Organisms; Spathiida
Replies: 2
Views: 547

Re: Soil Organisms; Spathiida

A very nice spathidiid! What kind of soil sample did you use?
by Bruce Taylor
Tue Sep 21, 2021 7:57 pm
Forum: Photography Through the Microscope
Topic: Protist ID please. Tetrahymena?
Replies: 5
Views: 731

Re: Protist ID please. Tetrahymena?

Yes, I've seen that too! :) A ciliate cortex is a pretty fragile membrane-enclosed structure, and wouldn't stay in one piece long enough for a strand of oscillatoria to grow inside it. So, if it's a ciliate of some kind I think the algae would have been inside it already when you fixed the organism ...
by Bruce Taylor
Mon Sep 20, 2021 11:57 am
Forum: Photography Through the Microscope
Topic: Protist ID please. Tetrahymena?
Replies: 5
Views: 731

Re: Protist ID please. Tetrahymena?

Some Tetrahymena will feed on small algae, but I've never heard of one that can eat large strands. I don't see any features that would suggest Tetrahymena ...I think you can rule that out. The diet is more typical of Frontonia , and it is also very common for cells of that genus to be temporarily de...