Search found 101 matches

by cuxlander
Sat Sep 07, 2019 3:48 pm
Forum: Identification help
Topic: testate amoebas ?
Replies: 8
Views: 1009

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: 1009

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: 1009

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: 3259

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
by cuxlander
Tue Apr 23, 2019 7:18 pm
Forum: Pictures and Videos
Topic: Nice Foraminifer from Egypt
Replies: 7
Views: 2103

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...
by cuxlander
Tue Apr 23, 2019 9:59 am
Forum: Identification help
Topic: Algae ID
Replies: 2
Views: 3442

Re: Algae ID

Cladophora ??

cheers,
Hans


PS Mougeotia is freshwater, the Baltic Sea is almost fresh in some areas.
by cuxlander
Tue Apr 23, 2019 9:48 am
Forum: Pictures and Videos
Topic: Nice Foraminifer from Egypt
Replies: 7
Views: 2103

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...
by cuxlander
Sat Mar 09, 2019 1:11 pm
Forum: Pictures and Videos
Topic: More Foram Fun
Replies: 5
Views: 1058

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
by cuxlander
Thu Mar 07, 2019 10:42 am
Forum: Pictures and Videos
Topic: Foraminifer from Honduras
Replies: 5
Views: 1244

Re: Foraminifer from Honduras

Hi,
Tanks for your comments.

@75RR
What mounting medium did you use?
Just water.



Hans
by cuxlander
Thu Mar 07, 2019 10:13 am
Forum: Pictures and Videos
Topic: Foraminifer from Honduras
Replies: 5
Views: 1244

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:...
by cuxlander
Wed Dec 19, 2018 7:55 pm
Forum: Beginner's corner
Topic: I was looking to get more out my microscope.
Replies: 9
Views: 2306

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 ...
by cuxlander
Wed Dec 19, 2018 7:48 pm
Forum: Identification help
Topic: Long ciliated
Replies: 2
Views: 1077

Re: Long ciliated

Hi jomaiz,
how long?
Hans
by cuxlander
Wed Dec 19, 2018 7:24 pm
Forum: Pictures and Videos
Topic: Identification of common things
Replies: 4
Views: 1051

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...
by cuxlander
Sat Dec 01, 2018 10:59 am
Forum: Pictures and Videos
Topic: Amoeba (arcella?) 'walking'
Replies: 14
Views: 1262

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
by cuxlander
Sun Nov 25, 2018 6:35 pm
Forum: Pictures and Videos
Topic: Miscellaneous Photomicrographs
Replies: 13
Views: 1365

Re: Miscellaneous Photomicrographs

Hello RobBerdan,
impressive photos, although I love to see Volvox in its natural colours.
Cheers,
Hans
by cuxlander
Mon Nov 12, 2018 9:48 am
Forum: Pictures and Videos
Topic: Spiral shell?
Replies: 6
Views: 798

Re: Spiral shell?

@75RR
definitely a foram,
see my posting viewtopic.php?f=6&t=5818
Cheers,
Hans
by cuxlander
Fri Nov 09, 2018 8:00 am
Forum: Pictures and Videos
Topic: Testate amoeba Heleopera petricola
Replies: 2
Views: 638

Re: Testate amoeba Heleopera petricola

@bob
I have sent you a PM
Hans
by cuxlander
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: 5480

Re: Pond aquarium / fish tank - how do you go about installing and keeping it?

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
by cuxlander
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: 5480

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...
by cuxlander
Wed Nov 07, 2018 1:03 pm
Forum: Pictures and Videos
Topic: Testate amoeba Heleopera petricola
Replies: 2
Views: 638

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...
by cuxlander
Tue Oct 09, 2018 9:08 am
Forum: Pictures and Videos
Topic: Amobeae tests (fresh water)
Replies: 15
Views: 1801

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...
by cuxlander
Fri Oct 05, 2018 9:58 am
Forum: Pictures and Videos
Topic: Amobeae tests (fresh water)
Replies: 15
Views: 1801

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
by cuxlander
Sun Sep 30, 2018 1:38 pm
Forum: Identification help
Topic: Swamp Biscuit
Replies: 5
Views: 1398

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
by cuxlander
Sat Sep 08, 2018 6:23 pm
Forum: Identification help
Topic: a kind of Amoeba?
Replies: 10
Views: 2765

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
by cuxlander
Thu Apr 19, 2018 10:22 am
Forum: Pictures and Videos
Topic: Poor man's SEM
Replies: 10
Views: 902

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...
by cuxlander
Tue Apr 17, 2018 8:58 am
Forum: Pictures and Videos
Topic: Poor man's SEM
Replies: 10
Views: 902

Re: Poor man's SEM

Addendum:

@ Charlie Guevara
All Hyalospheniidae are quite flat, see

Image

Hans
by cuxlander
Tue Apr 17, 2018 8:42 am
Forum: Pictures and Videos
Topic: Poor man's SEM
Replies: 10
Views: 902

Re: Poor man's SEM

Thanks for your comments. The collection and subsequent use of xenosomes, i.e. foreign materials for the reenforcement of testacea shells has frequently raised the question: May this already be called behaviour? Many members of the Hyalospheniidae build their shells using recycled shell plates scave...
by cuxlander
Mon Apr 16, 2018 4:36 pm
Forum: Pictures and Videos
Topic: Poor man's SEM
Replies: 10
Views: 902

Poor man's SEM

Hello, ths is the 169 µm high testate amoeba Planocarina (former Nebela) marginata obliquely illuminated: http://www.hans-rothauscher.de/testaceen/forum/marginata.jpg The shell is covered with scales which had been robbed from Euglypha and other foreign objects. 40x Neofluar, Stacked image, contrast...
by cuxlander
Tue Mar 06, 2018 5:43 pm
Forum: Pictures and Videos
Topic: Some Forams from Indian Ocean
Replies: 7
Views: 871

Re: Some Forams from Indian Ocean

Hello RR,
My wife collected them from Mombasa beach. The ones I measured were between 250 and 400 µm.
Greetings,
Hans
by cuxlander
Tue Mar 06, 2018 12:02 pm
Forum: Pictures and Videos
Topic: Some Forams from Indian Ocean
Replies: 7
Views: 871

Some Forams from Indian Ocean

Hello, here are some Foraminifers from Mombasa Beach, Kenia: http://www.hans-rothauscher.de/testaceen/forum/foram11.jpg http://www.hans-rothauscher.de/testaceen/forum/foram12.jpg http://www.hans-rothauscher.de/testaceen/forum/foram6.jpg http://www.hans-rothauscher.de/testaceen/forum/foram9.jpg Speci...