Thanks 75RR,
for the comments and for the hint about the "edit" function.
Hans
Search found 105 matches
- Wed Nov 06, 2019 6:31 pm
- Forum: Pictures and Videos
- Topic: Collotheca Video
- Replies: 3
- Views: 454
- Tue Nov 05, 2019 1:27 pm
- Forum: Pictures and Videos
- Topic: Collotheca Video
- Replies: 3
- Views: 454
Re: Collotheca Video
correction
No shirt, a short video
No shirt, a short video
- Tue Nov 05, 2019 1:25 pm
- Forum: Pictures and Videos
- Topic: Collotheca Video
- Replies: 3
- Views: 454
Collotheca Video
Hello,
here's a shirt video of a collotheca rotifer:
[youtube]https://youtu.be/Z5ODaFgxOFM[/youtube]
Cheers,
Hans
here's a shirt video of a collotheca rotifer:
[youtube]https://youtu.be/Z5ODaFgxOFM[/youtube]
Cheers,
Hans
- Mon Nov 04, 2019 11:33 am
- Forum: Identification help
- Topic: Seaweed help needed
- Replies: 2
- Views: 414
Re: Seaweed help needed
Hi.
the second picture shows some colonial diatoms, don't know species.
Cheers,
Hans
the second picture shows some colonial diatoms, don't know species.
Cheers,
Hans
- Sat Sep 07, 2019 3:48 pm
- Forum: Identification help
- Topic: testate amoebas ?
- Replies: 8
- Views: 1525
Re: testate amoebas ?
Hello 75RR,
Hans
Can I borrow your worm?first you need to train a worm ...
Hans
- Sat Sep 07, 2019 1:20 pm
- Forum: Identification help
- Topic: testate amoebas ?
- Replies: 8
- Views: 1525
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...
- Tue Sep 03, 2019 5:00 pm
- Forum: Identification help
- Topic: testate amoebas ?
- Replies: 8
- Views: 1525
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
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
- Wed May 08, 2019 5:48 pm
- Forum: Miscellaneous
- Topic: Rotifers scavenge genes...
- Replies: 6
- Views: 3734
Re: Rotifers scavenge genes...
Hello,
@norm
Cheers,
Hans
@norm
This is not a rotifer, probably Isotoma viridis.I found this guy in one of my overwatered plants the other day.
Cheers,
Hans
- Tue Apr 23, 2019 7:18 pm
- Forum: Pictures and Videos
- Topic: Nice Foraminifer from Egypt
- Replies: 7
- Views: 2230
Re: Nice Foraminifer from Egypt
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...
- Tue Apr 23, 2019 9:59 am
- Forum: Identification help
- Topic: Algae ID
- Replies: 2
- Views: 3528
Re: Algae ID
Cladophora ??
cheers,
Hans
PS Mougeotia is freshwater, the Baltic Sea is almost fresh in some areas.
cheers,
Hans
PS Mougeotia is freshwater, the Baltic Sea is almost fresh in some areas.
- Tue Apr 23, 2019 9:48 am
- Forum: Pictures and Videos
- Topic: Nice Foraminifer from Egypt
- Replies: 7
- Views: 2230
Nice Foraminifer from Egypt
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...
- Sat Mar 09, 2019 1:11 pm
- Forum: Pictures and Videos
- Topic: More Foram Fun
- Replies: 5
- Views: 1151
Re: More Foram Fun
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
I like them!
last year I already posted a few foram-photos, see
viewtopic.php?f=6&t=5818&sid=78292a1c74 ... 919dca8deb
Greetings,
Hans
- Thu Mar 07, 2019 10:42 am
- Forum: Pictures and Videos
- Topic: Foraminifer from Honduras
- Replies: 5
- Views: 1331
Re: Foraminifer from Honduras
Hi,
Tanks for your comments.
@75RR
Hans
Tanks for your comments.
@75RR
Just water.What mounting medium did you use?
Hans
- Thu Mar 07, 2019 10:13 am
- Forum: Pictures and Videos
- Topic: Foraminifer from Honduras
- Replies: 5
- Views: 1331
Foraminifer from Honduras
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:...
- Wed Dec 19, 2018 7:55 pm
- Forum: Beginner's corner
- Topic: I was looking to get more out my microscope.
- Replies: 9
- Views: 2519
Re: I was looking to get more out my microscope.
@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 ...
- Wed Dec 19, 2018 7:48 pm
- Forum: Identification help
- Topic: Long ciliated
- Replies: 2
- Views: 1160
Re: Long ciliated
Hi jomaiz,
how long?
Hans
how long?
Hans
- Wed Dec 19, 2018 7:24 pm
- Forum: Pictures and Videos
- Topic: Identification of common things
- Replies: 4
- Views: 1118
Re: Identification of common things
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...
- Sat Dec 01, 2018 10:59 am
- Forum: Pictures and Videos
- Topic: Amoeba (arcella?) 'walking'
- Replies: 14
- Views: 1431
Re: Amoeba (arcella?) 'walking'
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
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
- Sun Nov 25, 2018 6:35 pm
- Forum: Pictures and Videos
- Topic: Miscellaneous Photomicrographs
- Replies: 13
- Views: 1517
Re: Miscellaneous Photomicrographs
Hello RobBerdan,
impressive photos, although I love to see Volvox in its natural colours.
Cheers,
Hans
impressive photos, although I love to see Volvox in its natural colours.
Cheers,
Hans
- Mon Nov 12, 2018 9:48 am
- Forum: Pictures and Videos
- Topic: Spiral shell?
- Replies: 6
- Views: 855
- Fri Nov 09, 2018 8:00 am
- Forum: Pictures and Videos
- Topic: Testate amoeba Heleopera petricola
- Replies: 2
- Views: 689
Re: Testate amoeba Heleopera petricola
@bob
I have sent you a PM
Hans
I have sent you a PM
Hans
- Thu Nov 08, 2018 2:27 pm
- Forum: Specimens, samples and slides
- Topic: Pond aquarium / fish tank - how do you go about installing and keeping it?
- Replies: 23
- Views: 5696
Re: Pond aquarium / fish tank - how do you go about installing and keeping it?
Hello @MicroBob,
Greetings,
Hans
Why don't you let your platform swim in a defined immersion depth?originally I thought to keep the platform above water level to keep it moist
Greetings,
Hans
- Thu Nov 08, 2018 2:21 pm
- Forum: Specimens, samples and slides
- Topic: Pond aquarium / fish tank - how do you go about installing and keeping it?
- Replies: 23
- Views: 5696
Re: Pond aquarium / fish tank - how do you go about installing and keeping it?
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...
- Wed Nov 07, 2018 1:03 pm
- Forum: Pictures and Videos
- Topic: Testate amoeba Heleopera petricola
- Replies: 2
- Views: 689
Testate amoeba Heleopera petricola
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...
- Tue Oct 09, 2018 9:08 am
- Forum: Pictures and Videos
- Topic: Amobeae tests (fresh water)
- Replies: 15
- Views: 1959
Re: Amobeae tests (fresh water)
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...
- Fri Oct 05, 2018 9:58 am
- Forum: Pictures and Videos
- Topic: Amobeae tests (fresh water)
- Replies: 15
- Views: 1959
Re: Amobeae tests (fresh water)
Hello 75RR,
I believe your amoebae belong to the genus Zonomyxa.
See also http://www.mikro-tuemplerforum.at/viewt ... 625&p=2064
Regards,
Hans
I believe your amoebae belong to the genus Zonomyxa.
See also http://www.mikro-tuemplerforum.at/viewt ... 625&p=2064
Regards,
Hans
- Sun Sep 30, 2018 1:38 pm
- Forum: Identification help
- Topic: Swamp Biscuit
- Replies: 5
- Views: 1484
Re: Swamp Biscuit
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
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
- Sat Sep 08, 2018 6:23 pm
- Forum: Identification help
- Topic: a kind of Amoeba?
- Replies: 10
- Views: 2907
Re: a kind of Amoeba?
Hello Aenima,
I believe it is Zonomyxa violacea or an Amphizonella species.
Cheers,
Hans
Added: Se my http://hans-rothauscher.de/testaceen/pyxidicula.htm
I believe it is Zonomyxa violacea or an Amphizonella species.
Cheers,
Hans
Added: Se my http://hans-rothauscher.de/testaceen/pyxidicula.htm
- Thu Apr 19, 2018 10:22 am
- Forum: Pictures and Videos
- Topic: Poor man's SEM
- Replies: 10
- Views: 1015
Re: Poor man's SEM
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...
- Tue Apr 17, 2018 8:58 am
- Forum: Pictures and Videos
- Topic: Poor man's SEM
- Replies: 10
- Views: 1015
Re: Poor man's SEM
Addendum:
@ Charlie Guevara
All Hyalospheniidae are quite flat, see

Hans
@ Charlie Guevara
All Hyalospheniidae are quite flat, see

Hans