Search found 146 matches

by cuxlander
Sat Mar 16, 2024 10:40 am
Forum: Pictures and Videos
Topic: Euglenid posing as a hermit crab?
Replies: 7
Views: 390

Re: Euglenid posing as a hermit crab?

Hello again,
here's another one.
The bottom one seems to take a breath of fresh oxygen through Hyalosphenia papilio's pore.
Cheers Hans
by cuxlander
Fri Mar 15, 2024 3:06 pm
Forum: Pictures and Videos
Topic: Euglenid posing as a hermit crab?
Replies: 7
Views: 390

Re: Euglenid posing as a hermit crab?

Hello,

Call it deliberate or else. Lynn Margulis refers to the protist cell as the “conscious cell”.
It makes sense for a photosynthetic singleceller to search shelter inside an empty hyaline housing. And they obviously are quite determined as my few examples show:

Cheers
Hans,
by cuxlander
Sun Feb 18, 2024 2:53 pm
Forum: Pictures and Videos
Topic: Arcella conjugation?
Replies: 7
Views: 574

Re: Arcella conjugation?

Hello Harry, These are Netzelia tuberculata . I have elaborated 2 frames from your video. The left image shows the epipodia, with which the body is attached to the shell(left ) and the shape of the shell with depressions (the right one on the left image). If the two blobs in the right hand one are n...
by cuxlander
Fri Feb 16, 2024 1:19 pm
Forum: Pictures and Videos
Topic: Arcella conjugation?
Replies: 7
Views: 574

Re: Arcella conjugation?

Hello,

Interesting, looks like a division of Arcella hemisphaerica or Antarcella atava. Both around 50 µm wide.

Cheers,
Hans
by cuxlander
Tue Oct 24, 2023 12:17 pm
Forum: Articles and images to be published
Topic: Hyalosphenia papilio variant
Replies: 0
Views: 3812

Hyalosphenia papilio variant

Hello, Hyalosphenia papilio as we know it: papilio_114.jpg In 2007, Chaim Glück described a variation of Hyalosphenia papilio in which the shell is heavily dented below the pores. During his studies this variation proliferated and became dominant in his examined area. In 2022 I found the same variat...
by cuxlander
Sun Sep 18, 2022 10:55 am
Forum: Pictures and Videos
Topic: Testate Matryoshka
Replies: 2
Views: 557

Testate Matryoshka

Hello, Euglypha acantophora is the only known testate amoeba forming this double cyst: acantophora_schief.jpg acantophora3.jpg The inner cyst is typically spherical. However, this is surrounded by an egg-shaped outer cyst. This is covered by the reserve scales which the animal has produced for the n...
by cuxlander
Tue Jun 07, 2022 8:03 am
Forum: Identification help
Topic: which Ciliate?
Replies: 1
Views: 706

which Ciliate?

Hello Forum,

I found several of these creatures in sphagnum. About 90 µm dia. Slowly rotating. Many active contractile vacuoles. In transmiztted light only vaguely visible cilia.


Thanks,
Hans
by cuxlander
Sun May 29, 2022 1:23 pm
Forum: Pictures and Videos
Topic: Shelled Amoeba - Arcellinida
Replies: 5
Views: 1062

Re: Shelled Amoeba - Arcellinida

Hello Bob,
problem with the video is the filetype MTS which the browser cannot render. I downloaded the videofile and was able to open it with Windows' Media Player, very lively and interesting video.
Hans
by cuxlander
Sun May 29, 2022 9:06 am
Forum: Pictures and Videos
Topic: Shelled Amoeba - Arcellinida
Replies: 5
Views: 1062

Re: Shelled Amoeba - Arcellinida

Hello,
I cannot open the video. from the still: it is a Lesquereusia species.
Cheers,
Hans
by cuxlander
Sat Nov 20, 2021 10:00 am
Forum: Pictures and Videos
Topic: Which Rotifer?
Replies: 0
Views: 669

Which Rotifer?

Hello, I could not identify this rotifer. Noticeable is the funnel-like head with apparently only one corona. The photos were not ideal, I tried to piece together three individual photos in a reasonably sensible way. There's a video here: https://youtu.be/D-9wVHFF_6o Length approx. 250 µm Thanks, Hans
by cuxlander
Wed Jul 21, 2021 10:26 am
Forum: Identification help
Topic: Strange sea creature!
Replies: 2
Views: 2388

Re: Strange sea creature!

Hello Brutha,
maybe a leech.

Greetings,
Hans
by cuxlander
Mon May 10, 2021 9:15 am
Forum: Miscellaneous
Topic: Visually Handicapped Microscope User
Replies: 7
Views: 2663

Re: Visually Handicapped Microscope User

Hi, My right eye has very low vision, the left one is OK. So I have problems similar to yours. I have found and purchased this mono/photo eyepiece, which fits on all of the old Zeiss Standards: http://www.hans-rothauscher.de/testaceen/forum/junior.jpg edit: If the image does not show, here is anothe...
by cuxlander
Sun Feb 07, 2021 2:48 pm
Forum: Pictures and Videos
Topic: Netzelia corona - a pretty testate amoeba
Replies: 6
Views: 2765

Re: Netzelia corona - a pretty testate amoeba

Hello, glad you like the photos. @sdani the shell was empty and the pseudostom and some of the spines a bit damaged. For this kind of thick globular objects I use slides with concave depression. Items don't crush so easily and sometimes you are able to turn them. The photos are stacks of about 20 fr...
by cuxlander
Fri Feb 05, 2021 10:06 am
Forum: Pictures and Videos
Topic: Return to the Biofilm
Replies: 2
Views: 1280

Re: Return to the Biofilm

Hello Don,
your voice in your videos is always quite faint. The volume of the music is OK. Interesting active rotifers.
Cheers,
Hans
by cuxlander
Thu Feb 04, 2021 1:01 pm
Forum: Pictures and Videos
Topic: Netzelia corona - a pretty testate amoeba
Replies: 6
Views: 2765

Netzelia corona - a pretty testate amoeba

Hello,

Yesterday I found this Netzelia corona (former Difflugia corona), size 195 µm. Joseph Leidy considered it "the most remarkable and beautiful species of the genus" .

Here are two aspects:




(40x Neofluar)

Cheers,
Hans
by cuxlander
Wed Dec 16, 2020 2:23 pm
Forum: Beginner's corner
Topic: Stacked pictures come out Cartoonish
Replies: 15
Views: 6280

Re: Stacked pictures come out Cartoonish

Hello plasmid,
one of the pics used ...
I feel that the single source image already shows sharp edges.
Rgds,
Hans
by cuxlander
Thu Nov 19, 2020 2:46 pm
Forum: Identification help
Topic: Too big to be a Heliozoa right?
Replies: 1
Views: 1685

Re: Too big to be a Heliozoa right?

How big??
cheers, Hans
by cuxlander
Mon Nov 09, 2020 9:59 am
Forum: Pictures and Videos
Topic: Lost in space?
Replies: 4
Views: 2325

Re: Lost in space?

@Hans I like Joseph Leidys drawings. The green balls in these drawings and in my photo are symbiont algae. You find the same algae in Hyalosphenia, some Difflugia, the green Hydra etc. They can survive without their hosts, the hosts howwever cannot do without their symbiont algae. Greetings, the oth...
by cuxlander
Sun Nov 08, 2020 5:59 pm
Forum: Pictures and Videos
Topic: Lost in space?
Replies: 4
Views: 2325

Lost in space?

Hello, Countless planets in endless space? http://www.hans-rothauscher.de/testaceen/forum/weltraum.jpg No, a look inside Heleopera sphagni http://www.hans-rothauscher.de/testaceen/forum/sphagni2.jpg Encysted specimen, symbiont algae around large transparent nucleus. Stack, 100x Achromat enjoy, Hans
by cuxlander
Tue Sep 08, 2020 10:32 am
Forum: Pictures and Videos
Topic: Arcella discoides
Replies: 6
Views: 3175

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: 3175

Arcella discoides

discoides1.jpg discoides2.jpg 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: 2. Arcella discoides 133 µm stack of two (discoides are nicely flat) focal planes, showing 9 of 10...
by cuxlander
Sun Jul 05, 2020 10:07 am
Forum: Pictures and Videos
Topic: Horsefly portrait
Replies: 5
Views: 2300

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: 1300

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: 3218

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: 3218

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: 3341

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: 3341

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: 3341

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: 2487

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: 4641

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