Search found 127 matches

by cuxlander
Tue Sep 08, 2020 10:32 am
Forum: Pictures and Videos
Topic: Arcella discoides
Replies: 6
Views: 453

Re: Arcella discoides

Hi,
thanks for all your kind comments.
Hans
by cuxlander
Sat Sep 05, 2020 7:13 pm
Forum: Pictures and Videos
Topic: Arcella discoides
Replies: 6
Views: 453

Arcella discoides

Hello Forists, I just bought me a Zeiss Plan-Neofluar 63/125 Oil and would like to show two of my first oil-immersion-photos: 1. Arcella discoides 122 µm one focal plane: http://hans-rothauscher.de/testaceen/forum/discoides1.jpg 2. Arcella discoides 133 µm stack of two (discoides are nicely flat) fo...
by cuxlander
Sun Jul 05, 2020 10:07 am
Forum: Pictures and Videos
Topic: Horsefly portrait
Replies: 5
Views: 345

Re: Horsefly portrait

Hello Bob,
microscope adapter
please tell us about this adapter.

Cheerrs,
Hans
by cuxlander
Sun Jul 05, 2020 10:04 am
Forum: Identification help
Topic: Amoeba or Ciliate?
Replies: 0
Views: 390

Amoeba or Ciliate?

Hello Forum,
What is this ?
Abt 110 µm big, not moving, digesting.

Image

Cheers,
Hans
by cuxlander
Sat Jun 27, 2020 6:23 pm
Forum: Pictures and Videos
Topic: Inside Centropyxis
Replies: 5
Views: 1197

Re: Inside Centropyxis

Hello, thanks for your comments. Views which SEMs cannot provide. Here's another example: http://hans-rothauscher.de/testaceen/pics/Pontigulasia%20elisa_94.jpg http://hans-rothauscher.de/testaceen/pics/pontigulasia_bruecke.jpg . Pontigulasia (= throat bridge) build internal bridges to prevent Rotife...
by cuxlander
Tue Jun 23, 2020 5:42 pm
Forum: Pictures and Videos
Topic: Inside Centropyxis
Replies: 5
Views: 1197

Inside Centropyxis

Hello Forum, usually you observe disc shaped testate amoebae like Arcella or Centropyxis sitting flat on your glass slide, like this Centropyxis discoides : http://hans-rothauscher.de/testaceen/pics/discoides2.png With some luck and glycerol I have been able to view the following two specimen from ...
by cuxlander
Mon Jun 15, 2020 5:39 pm
Forum: Pictures and Videos
Topic: Campylodiscus (hibernicus?)
Replies: 7
Views: 708

Re: Campylodiscus (hibernicus?)

Moin Bob, the Kreidesee (Chalk-Lake) is a rather deep and very clear lake in the Cuxhaven area. It is a sport-divers hotspot. Yes it is recent and I also frequently find live specimen. Their contents regularly obscures stacks. http://hans-rothauscher.de/testaceen/forum/campylo5.jpg Like with other d...
by cuxlander
Mon Jun 15, 2020 9:25 am
Forum: Pictures and Videos
Topic: Campylodiscus (hibernicus?)
Replies: 7
Views: 708

Re: Campylodiscus (hibernicus?)

Hi, thanks for your comments! @ KurtM and 75RR: I am using concave slides. Turning specimens is, like 75RR described the method, "hit and miss". I touch the cover glass with a needle and/or slightly move it aside. Not much of a miracle. @Bob: I found them occasionally in the mud of the Kreidesee Hem...
by cuxlander
Sun Jun 14, 2020 7:32 pm
Forum: Pictures and Videos
Topic: Campylodiscus (hibernicus?)
Replies: 7
Views: 708

Campylodiscus (hibernicus?)

Hello forum, this empty Campylodiscus reluctantly permitted me to turn it into various positions: http://www.hans-rothauscher.de/testaceen/forum/campylo1.png http://www.hans-rothauscher.de/testaceen/forum/campylo2.png http://www.hans-rothauscher.de/testaceen/forum/campylo3.png http://www.hans-rothau...
by cuxlander
Sun May 10, 2020 5:09 pm
Forum: Camera systems and imaging
Topic: PWM and banding
Replies: 3
Views: 634

PWM and banding

Hello,
I am using a makeshift LED with PWM dimming. Frequently I experienced strong banding.
Then I forgot to remove a POL-foil from the in-base illuminator. No more banding.
Does this make sense?
Cheers,
Hans
by cuxlander
Sun Apr 12, 2020 9:14 am
Forum: Pictures and Videos
Topic: Euglypha ciliata (testate amoeba)
Replies: 15
Views: 918

Re: Euglypha ciliata (testate amoeba)

Hello,

yes an interesting property of Euglyphides.
They produce these scales in their golgi-apparatus and store them inside for the coming cell generation:

Image

Cheers,
Hans
by cuxlander
Mon Mar 30, 2020 10:27 am
Forum: Identification help
Topic: Not an amoeba?
Replies: 9
Views: 4057

Re: Not an amoeba?

Hello 75RR,

yes lobster trap was my first impression, too, which this photograph shows even more clearly (glycerine and slight polarised light):

Image


Still, the riddle remains!

Cheers,
Hans
by cuxlander
Sat Mar 28, 2020 6:21 pm
Forum: Identification help
Topic: Not an amoeba?
Replies: 9
Views: 4057

Re: Not an amoeba?

Hello, thanks to all.
It will remain a secret.
Hans
by cuxlander
Sat Mar 28, 2020 6:20 pm
Forum: Identification help
Topic: Not an amoeba?
Replies: 9
Views: 4057

Re: Not an amoeba?

Hello, thanks to all.
It will remain a secret.
Hans
by cuxlander
Fri Mar 13, 2020 6:34 pm
Forum: Identification help
Topic: Not an amoeba?
Replies: 9
Views: 4057

Re: Not an amoeba?

Thanks,

@75RR Yes I'm sure the right direction. Problem is the size and regular shape of my specimen.

Hans
by cuxlander
Thu Mar 12, 2020 9:59 am
Forum: Identification help
Topic: Not an amoeba?
Replies: 9
Views: 4057

Not an amoeba?

Hello, At first glance this 232 µm high specimen from bog water looks like a testate amoeba http://www.hans-rothauscher.de/testaceen/forum/unknown.jpg However, there are to my knowledge no testacea with a round circumference and a rather clear grainy surface with litte pimples around the fundus. The...
by cuxlander
Sat Feb 08, 2020 12:28 pm
Forum: Camera systems and imaging
Topic: Toupview (Lite) in Ubuntu linux
Replies: 3
Views: 2189

Re: Toupview (Lite) in Ubuntu linux

Thanks Essaouira,

I like the look-and-feel of Ubuntu. But as selection of software is so much limited and difficult to install I am happily back to Win10.

Greetings,
Hans
by cuxlander
Sat Feb 01, 2020 6:24 pm
Forum: Camera systems and imaging
Topic: Toupview (Lite) in Ubuntu linux
Replies: 3
Views: 2189

Toupview (Lite) in Ubuntu linux

Hello,
has anyone managed to run this software in Ubuntu?
I cannot load this program at all.
Thanks,
Hans
by cuxlander
Sat Jan 18, 2020 11:40 am
Forum: Pictures and Videos
Topic: Testate Amoeba - Difflugia pyriformis
Replies: 4
Views: 778

Re: Testate Amoeba - Difflugia pyriformis

Hello Chris, your specimen is about 120 µm high. Most pyriform difflugia are much bigger. One characteristic is the very regular bunch of "stones" around the aperture. Not typical for Zivkovicia/pontigulasia/, my first wild guess was probably wrong. As Ferry Siemensma wrote, "Identification [of Diff...
by cuxlander
Thu Jan 16, 2020 9:38 am
Forum: Pictures and Videos
Topic: Testate Amoeba - Difflugia pyriformis
Replies: 4
Views: 778

Re: Testate Amoeba - Difflugia pyriformis

Hello Chris,
Scale bar 100 µm?
may be Zivkovicia spectabilis, look at 40-45 seconds for view into pseudostome.
compare https://www.arcella.nl/zivkovicia-spectabilis/
Cheers,
Hans
by cuxlander
Wed Jan 15, 2020 6:18 pm
Forum: Identification help
Topic: Aecella, are these pseudopods
Replies: 2
Views: 1716

Re: Arcella, are these pseudopods

Hi Mike,
no, that's detritus or other rubbish.
The Arcella (conica?) is either encysted or empty.
Cheers,
Hans
by cuxlander
Thu Dec 19, 2019 11:49 am
Forum: Camera systems and imaging
Topic: Video Editing Software
Replies: 10
Views: 4731

Re: Video Editing Software

Hello,
also try Virtualdub at http://www.virtualdub.org/index
Its free and quite powerful, quite a learning curve though.
Hans
by cuxlander
Wed Nov 06, 2019 6:31 pm
Forum: Pictures and Videos
Topic: Collotheca Video
Replies: 3
Views: 907

Re: Collotheca Video

Thanks 75RR,
for the comments and for the hint about the "edit" function.
Hans
by cuxlander
Tue Nov 05, 2019 1:27 pm
Forum: Pictures and Videos
Topic: Collotheca Video
Replies: 3
Views: 907

Re: Collotheca Video

correction

No shirt, a short video
by cuxlander
Tue Nov 05, 2019 1:25 pm
Forum: Pictures and Videos
Topic: Collotheca Video
Replies: 3
Views: 907

Collotheca Video

Hello,

here's a shirt video of a collotheca rotifer:

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

Cheers,
Hans
by cuxlander
Mon Nov 04, 2019 11:33 am
Forum: Identification help
Topic: Seaweed help needed
Replies: 2
Views: 2069

Re: Seaweed help needed

Hi.
the second picture shows some colonial diatoms, don't know species.
Cheers,
Hans
by cuxlander
Sat Sep 07, 2019 3:48 pm
Forum: Identification help
Topic: testate amoebas ?
Replies: 8
Views: 2506

Re: testate amoebas ?

Hello 75RR,
first you need to train a worm ...
Can I borrow your worm?

Hans
by cuxlander
Sat Sep 07, 2019 1:20 pm
Forum: Identification help
Topic: testate amoebas ?
Replies: 8
Views: 2506

Re: testate amoebas ?

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...
by cuxlander
Tue Sep 03, 2019 5:00 pm
Forum: Identification help
Topic: testate amoebas ?
Replies: 8
Views: 2506

Re: testate amoebas ?

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
by cuxlander
Wed May 08, 2019 5:48 pm
Forum: Miscellaneous
Topic: Rotifers scavenge genes...
Replies: 6
Views: 5777

Re: Rotifers scavenge genes...

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