MicrobeHunter.com Microscopy Forum

Thanks 75RR,
for the comments and for the hint about the "edit" function.
Hans

correction

No shirt, a short video

Hello,

here's a shirt video of a collotheca rotifer:

[youtube]https://youtu.be/Z5ODaFgxOFM[/youtube]

Cheers,
Hans

Hi.
the second picture shows some colonial diatoms, don't know species.
Cheers,
Hans

Hello 75RR,

first you need to train a worm ...

Can I borrow your worm?

Hans

Hello Mintakax, As for side view, is there a procedure for obtaining this ? No procedure! One tries to turn the object by tipping on the cover glass or pushing the glass to a side. If you are lucky the object rotates a bit and lets you view it from another angle. Convex slides are helpful. Its 10% s...

Hello mintakax,

some guesses:
1. An Arcella, size and side view would have helped
2. Probably a Difflugia or a Pontigulasia
3. A filose Amoeba
4. No idea, probably no Amoeba
5. Probably another small Arcella
6. Probably another filose Amoeba or as 75RR guessed a Heliozoa.

Cheers,
Hans

Hello,

@norm

I found this guy in one of my overwatered plants the other day.

This is not a rotifer, probably Isotoma viridis.


Cheers,
Hans

Hello Michael, My imaging train is not sopisticated. Illumination is by a DYO-LED, my top lamp is an Ikea Sansjö . As you will probably know, the Zeiss KF2 has a fixed illumination and a basic diaphragm condensor, no koehlering. As cameraobjective the Amscope 14 mP CMOS Camera (MU1400) has got a Plö...

Cladophora ??

cheers,
Hans


PS Mougeotia is freshwater, the Baltic Sea is almost fresh in some areas.

Hello, This pretty foraminifera came from Red Sea beach sand. 25x Neofluar transmitted and reflected light. About 300 µm wide. Stacked with Picolay from 38 frames: http://www.hans-rothauscher.de/testaceen/forum/foram_last.jpg You will probably also like this version of the photo, greyscale, negative...

Hi Kurt,
I like them!
last year I already posted a few foram-photos, see
viewtopic.php?f=6&t=5818&sid=78292a1c74 ... 919dca8deb
Greetings,
Hans

Hi,
Tanks for your comments.

@75RR

What mounting medium did you use?

Just water.



Hans

Hello, The sand on Roatan-beach did not contain many forams. This is a stack of a 400 µm large specimen, taken with 25x Neofluar, transmitted and reflected (Sansjö-Lamp) light. The original fotos where quite dull and required quite some contrast and sharpness enhancement, negative, grayscaled. http:...

@MicroBob, Also interesting: The Universiy of Hamburg entertains a big algae collection. Some desmidacaes have been collected 50 years ago and are grown and cared for since then. I have a rather old water sample from spring with demids (M. rotata and Netrium) still healthy and multiplying, although ...

Hi jomaiz,
how long?
Hans

Hi jomaiz, I do not know what the third one is, though I find them quite often. Plant seed or insect egg?? Still I like them, here are my impressions: http://www.hans-rothauscher.de/testaceen/forum/fruehstuecksei.jpg softboiled egg (empty) http://www.hans-rothauscher.de/testaceen/forum/smiley.jpg Sm...

Hi Aenima,
the first one is a Centropyxis most probably aculeata.
Second one ?? I wonder if phase contrast is the right method for this kind of object?
The last one??
Cheers,
Hans

Hello RobBerdan,
impressive photos, although I love to see Volvox in its natural colours.
Cheers,
Hans

@75RR
definitely a foram,
see my posting viewtopic.php?f=6&t=5818
Cheers,
Hans

@bob
I have sent you a PM
Hans

Hello @MicroBob,

originally I thought to keep the platform above water level to keep it moist

Why don't you let your platform swim in a defined immersion depth?
Greetings,
Hans

Hello, interesting thread. I have a similar project and wonder if anybody here has any idea: Recenctly I have obtained a handful of bog sphagnum inhabiting several species of testate amoeba. Sphagnum are multi storey buildings with organisms in the bottom region requiring pure water, up to some in t...

Hello forum, Heleopera petricola is not uncommon in wet bog sphagnum. Unfortunately water samples from this source usually are quite untidy, with sphagnum leaves and other debris spoiling the view. So it is a challenge to view a tidy specimen. Here is a nice 135 µm high specimen: http://www.hans-rot...

Hello 75RR, I believe your amoebae belong to the genus Zonomyxa. I had based my guess on the countless small (< 1 µm) violet granules filling the cytoplasm. There are two very similar Genera: Amphizonella found in dryer moss. Zonomyxa living in Sphagnum. (see also http://www1.nencki.gov.pl/pdf/ap/ap...

Hello 75RR,

I believe your amoebae belong to the genus Zonomyxa.
See also http://www.mikro-tuemplerforum.at/viewt ... 625&p=2064

Regards,
Hans

Hello Grahame,
cannot figure the size oft he creatures from the numbers in the pictures, 30 µm and 20 µm cannot be the diameters?
I believe these are Arcella of the hemisphaerica/rotundata/intermedia-Komplex, sizes between approx. 35 and 62 µm.
Greetings,
Hans

Hello Aenima,
I believe it is Zonomyxa violacea or an Amphizonella species.
Cheers,
Hans


Added: Se my http://hans-rothauscher.de/testaceen/pyxidicula.htm

Hello @desertrat a scientific paper Thanks, I did not know this paper. Interesting that testate amoebae predated the Ediacarian. I have read somewhere that the filopodia (Eyglypha) are still considerably older than the arcellinida. Also interesting that Testate amoebae have been successfully used as...

Addendum:

@ Charlie Guevara
All Hyalospheniidae are quite flat, see



Hans