Search found 243 matches

by Bruce Taylor
Tue Mar 31, 2020 12:26 am
Forum: Pictures and Videos
Topic: Peritrichida
Replies: 9
Views: 213

Re: Peritrichida

Gorgeous! Really nice detail.

These are solitary vorticellids (spirally contractile stalk with sinusoidal myoneme). Identification to genus would require a very close look at the pellicle (preferably with silver stain).
by Bruce Taylor
Thu Mar 26, 2020 7:36 pm
Forum: Pictures and Videos
Topic: Dileptid Hunting and Eating
Replies: 17
Views: 1354

Re: Dileptid Hunting and Eating

Bruce, I am wondering how the amoeba population is linked to the population of other protists...What parameters are conducive to amoeba and diatom population explosions ? I'm not sure that a thousand pages would be enough to answer that question. It might require a small library. ;) Diatoms are a l...
by Bruce Taylor
Thu Mar 26, 2020 1:58 pm
Forum: Pictures and Videos
Topic: Dileptid Hunting and Eating
Replies: 17
Views: 1354

Re: Dileptid Hunting and Eating

Yup, changes in temperatures can certainly promote blooms of particular organisms. But there are many things at play in your tanks...light levels, oxygen, water column mixing/stagnation, sulfur uptake, saprobity (amount of the organic matter in the tank that is decomposing), pH (decomposition tends ...
by Bruce Taylor
Wed Mar 25, 2020 7:18 pm
Forum: Pictures and Videos
Topic: Dileptid Hunting and Eating
Replies: 17
Views: 1354

Re: Dileptid Hunting and Eating

Dileptids readily form cysts, when environmental conditions won't support vegetative growth. If you pick healthy cells out with a micropipette and place them in a small quantity of water with no food, you can sometimes induce them to encyst. A depression slide works well, or a small petri dish. At a...
by Bruce Taylor
Wed Mar 25, 2020 12:41 pm
Forum: Identification help
Topic: Not an amoeba?
Replies: 9
Views: 1813

Re: Not an amoeba?

Very odd. I'm unaware of any ciliate (vaginicolid, metacystid, etc.) with such a complex lorica.
by Bruce Taylor
Fri Mar 20, 2020 3:45 pm
Forum: Identification help
Topic: Help with ciliate ID
Replies: 4
Views: 391

Re: Help with ciliate ID

For what it's worth, I suggested a stramenopile alga (chrysophytes, Synurophyceae, etc.) because of the golden colour of the chloroplast, and because the spiny processes reminded me a bit of Mallomonas. However, I am not very good at identifying photosynthetic organisms! :)
by Bruce Taylor
Fri Mar 20, 2020 12:09 am
Forum: Identification help
Topic: Help with ciliate ID
Replies: 4
Views: 391

Re: Help with ciliate ID

For starters, it's not a ciliate. ;)

It seems to be a stramenopile alga of some kind (not my bailiwick...I hope someone else can help. :D).
by Bruce Taylor
Thu Mar 19, 2020 7:16 pm
Forum: Identification help
Topic: Spins/twirls and looks like a bow
Replies: 10
Views: 929

Re: Spins/twirls and looks like a bow

The michel marie video must have been filmed with a cover glass since they aren't spinning and they look kind of flattened. If I ever see this process again maybe I will try to film it all the way to the end. Funny you should say that...I remember him telling me he didn't use coverslips! Not sure i...
by Bruce Taylor
Thu Mar 19, 2020 5:10 pm
Forum: Identification help
Topic: Spins/twirls and looks like a bow
Replies: 10
Views: 929

Re: Spins/twirls and looks like a bow

This morning, while reading a classic paper on ciliate conjugation, I learned something interesting. I think it explains what we are seeing, here! :) As I mentioned above, I suspect the ciliates in this video are metopids (because of distinctive cell features, visible at several points in the video)...
by Bruce Taylor
Wed Mar 18, 2020 12:59 am
Forum: Identification help
Topic: Spins/twirls and looks like a bow
Replies: 10
Views: 929

Re: Spins/twirls and looks like a bow

Is that really what this is? It's my best guess, at the moment, but I certainly could be wrong. :D This might also be a kind of ciliate "monster" called a homopolar doublet (which can be caused by conjugal failure). What it is not is a single organism in its "normal" vegetative condition. ;) The re...
by Bruce Taylor
Tue Mar 17, 2020 10:44 pm
Forum: Identification help
Topic: Spins/twirls and looks like a bow
Replies: 10
Views: 929

Re: Spins/twirls and looks like a bow

I believe this is a pair of metopid ciliates (Metopus, etc.) in conjugation. Ciliate sex! :)
by Bruce Taylor
Tue Mar 17, 2020 12:55 pm
Forum: Pictures and Videos
Topic: Dileptid Hunting and Eating
Replies: 17
Views: 1354

Re: Dileptid Hunting and Eating

RobBerdan wrote:
Tue Mar 17, 2020 4:06 am
Nice movie Bruce - wouldn't it be nice to be able to just zoom in on the organism rather that have to change objectives.
The Darkfield is nice and the ciliates appears to glow.
Cheers
RB
Yes, the colours are lovely (note that it's not my video, though!).
by Bruce Taylor
Mon Mar 16, 2020 12:25 pm
Forum: Pictures and Videos
Topic: Dileptid Hunting and Eating
Replies: 17
Views: 1354

Re: Dileptid Hunting and Eating

Very cool! I love watching ciliate predators.
by Bruce Taylor
Mon Mar 16, 2020 12:24 pm
Forum: Pictures and Videos
Topic: Crushed to death by air bubble
Replies: 5
Views: 1871

Re: Crushed to death by air bubble

We seem to see a 2-part macronucleus, though it's hard to be sure. If so, it is in the family Dimacrocaryonidae, and would be either Rimaleptus or Dimacrocaryon (we'd have to see the oral structures more clearly...I imagine I'm seeing an area of refractive matter around the mouth, which would sugges...
by Bruce Taylor
Sun Mar 15, 2020 9:02 pm
Forum: Pictures and Videos
Topic: Litonotus lamella ?
Replies: 3
Views: 1364

Re: Litonotus lamella ?

A quick internet search implies that extrusomes are ejectable membrane-bound organelle. But what are keneties? Kineties are longitudinal rows of somatic cilia or cirri. The number and distribution of these rows can be a useful feature for identification of ciliates. Observing the kineties on the up...
by Bruce Taylor
Sun Mar 15, 2020 11:39 am
Forum: Pictures and Videos
Topic: Litonotus lamella ?
Replies: 3
Views: 1364

Re: Litonotus lamella ?

Nice, clear video! :) Yes, it's Litonotus (lanceolate cell, 2 macronuclear nodules, subterminal contractile vacuole, ciliary rows not converging at anterior and posterior ). L. lamella is possible, but L. crystallinus is a contender (the upper surface of the cell seems to be distinctly ribbed), and ...
by Bruce Taylor
Sat Mar 14, 2020 2:11 pm
Forum: Identification help
Topic: a blob with a tail?
Replies: 4
Views: 1627

Re: a blob with a tail?

75RR wrote:
Sat Mar 14, 2020 12:33 am
possibly a flattened (by the cover slip) Dileptus sp.
Yes, a dileptid (but not necessarily Dileptus).
by Bruce Taylor
Sat Mar 14, 2020 11:43 am
Forum: Pictures and Videos
Topic: Crushed to death by air bubble
Replies: 5
Views: 1871

Re: Crushed to death by air bubble

Nice video. :) This is a rather squashed dileptid ciliate ( Dileptus , Rimaleptus , Monilicaryon , etc.) The cytostome (cell mouth) at the base of the proboscis is briefly visible, early in the video. The cell is somewhat deformed, probably by coverslip pressure. Before the water under the coverslip...
by Bruce Taylor
Wed Mar 11, 2020 11:13 pm
Forum: Pictures and Videos
Topic: Zosterodasys transversus
Replies: 3
Views: 1530

Re: Zosterodasys transverses

Very nice! Great work locating and identifying the synymenium. Another useful clue for Zosterodasys is the highly vacuolated cytoplasm, visible in several of your images. One small detail...note that the current correct species name is Z. transversus (with a "u"). The spelling problem is addressed h...
by Bruce Taylor
Tue Mar 10, 2020 1:17 am
Forum: Pictures and Videos
Topic: Hypotrich Ciliate is having lunch
Replies: 12
Views: 4656

Re: Coleps is having lunch

daruosha wrote:
Fri Mar 06, 2020 4:23 am
What do think it is?
It is a hypotrich ciliate. We only see a few of its somatic cirri, and the cell is somewhat compressed, so identification below subclass isn't possible.
by Bruce Taylor
Tue Mar 10, 2020 1:11 am
Forum: Pictures and Videos
Topic: A Ciliate rise and fall
Replies: 4
Views: 2717

Re: A Ciliate rise and fall

Nice sequence! :) The ciliate in the first image is not particularly "happy," though. ;) Already, the cell is quite swollen, and a bleb is forming (on the lower right, from the viewer's perspective). Sometimes, the act of transferring a ciliate to a slide can cause difficulties with osmoregulation, ...
by Bruce Taylor
Thu Mar 05, 2020 12:50 pm
Forum: Pictures and Videos
Topic: Diversity in one sample from aquarium
Replies: 20
Views: 4109

Re: Diversity in one sample from aquarium

Beautiful! :)
by Bruce Taylor
Thu Mar 05, 2020 12:40 am
Forum: Pictures and Videos
Topic: Vorticella film
Replies: 9
Views: 1411

Re: Vorticella film

Well it's a great hobby, KD, and you're off to a fantastic start! :)
by Bruce Taylor
Wed Mar 04, 2020 9:25 pm
Forum: Pictures and Videos
Topic: Vorticella film
Replies: 9
Views: 1411

Re: Vorticella film

Great footage! The critters in the first fifteen seconds have contractile zooids, and very short non-contractile stalks, so are probably a species of Rhabdostyla . The ones in the second half are in family Vorticellidae,but not necessarily Vorticella . We don't see the pellicle of the cell closely e...
by Bruce Taylor
Wed Feb 05, 2020 1:01 pm
Forum: Pictures and Videos
Topic: more loxophyllum meleagris...
Replies: 5
Views: 964

Re: more loxophyllum meleagris...

Oh, those are wonderful! I especially like the worm-devouring. :) We don't see dorsal "warts" (bundles of extrusomes), so I don't think this is Loxophyllum meleagris . Some species of Loxophyllum have dorsal extrusomes that are not organized in marginal warts, and not easily visible in the light mic...
by Bruce Taylor
Tue Feb 04, 2020 6:04 pm
Forum: Pictures and Videos
Topic: Large Ciliate
Replies: 7
Views: 1223

Re: Large Ciliate

Chris Dee wrote:
Tue Feb 04, 2020 8:55 am
Looks like Loxophyllum maleagris
Yup. :) (spelled Loxophyllum meleagris, though!)

Great video!
by Bruce Taylor
Fri Jan 31, 2020 1:37 pm
Forum: Identification help
Topic: Ciliate ID request
Replies: 10
Views: 2344

Re: Ciliate ID request

It is not Paramecium . Cirri are visible at the posterior, as you have noted (they could be caudal cirri, or long dangling transverse ones). We catch brief glimpses of an adoral zone of membranelles (AZM). It is not "question-mark shaped," as in most hypotrichs, but seems to be in the "gonostomatid"...
by Bruce Taylor
Tue Jan 21, 2020 6:05 pm
Forum: Pictures and Videos
Topic: ciliate under a dic
Replies: 3
Views: 433

Re: ciliate under a dic

Very nice! :) It is a species of Urotricha.
by Bruce Taylor
Mon Jan 13, 2020 5:07 am
Forum: Pictures and Videos
Topic: want to help me check my IDs?
Replies: 3
Views: 361

Re: want to help me check my IDs?

Yup. There are about 4,500 named species of ciliate (and maybe twice as many that haven't yet been found) so there's always plenty to learn! :D
by Bruce Taylor
Mon Jan 13, 2020 4:24 am
Forum: Pictures and Videos
Topic: want to help me check my IDs?
Replies: 3
Views: 361

Re: want to help me check my IDs?

Nice collection! :) The first image is likely a colepid, but not necessarily Coleps (the genus has been split, in recent years, and identification now requires a very clear view of the critter's calcified armour). The second one appears to be Aspidisca , but identification to species is not possible...