Micrasterias thomasiana and denticulata

Images made through a microscope. All subject types.

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KDan
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Micrasterias thomasiana and denticulata

Post by KDan »

An oblique illumination was used to show up the surface plasticity. Zeiss apochromat 16/0,4.

Image
Image

Cyclops
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Post by Cyclops »

Really nicely done!!
Canon 30D | Canon IXUS 265HS | Cosina 100mm f3.5 macro | EF 75-300 f4.5-5.6 USM III | EF 50 f1.8 II | Slik 88 tripod | Apex Practicioner monocular microscope

Mitch640
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Post by Mitch640 »

Excellent images. I have always liked this effect and was just recently able to do it myself. :)

Jan l'Amie
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Post by Jan l'Amie »

Nice pictures, but the second one is not denticulata but also a thomasiana
var. notata. Denticulata has rounded lobules. At the second picture has only the upper half of the cell rounded lobules. This is because the cell is not yet fully growed.

Greetings from The Netherlands
Jan l'Amie
member of Desmids Nederland
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Cactusdave
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Post by Cactusdave »

I really like Desmids. These are exceptionally nice pictures, too bad I don't have a nice sphagnum bog nearby to find any.
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Mitch640
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Post by Mitch640 »

Desmids are everywhere. I have found them in standing puddles after a rain to the Mississippi River. I usually find mine in the sediment at the bottom of my microbe aquarium. :)

KDan
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Joined: Tue Mar 02, 2010 8:12 am
Location: Czech Republic

Post by KDan »

Thanks.

Jan l'Amie:

Thank you very much for the specification. I hope now it is M. denticulata (var. angulosa).

Image

Greetings from the Czech Republic,

Karel Danek

Jan l'Amie
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Post by Jan l'Amie »

Sorry, but I think it's still a thomasiana, not sure about the var.
If you take a sharp look at the lobules you can still see little ,,teeth,,.
Denticulata has realy round lobules. I can't show you a photo of mine because I never found one in The Netherlands.
Till now I found Micrasterias thomasiana (div. var.), rotata, jenneri, truncata (div. var.), papillifera (looks a bit like rotata but has sometimes little knobs at the lobules ends), crux-melitensis and only ones americana in The Netherlands.
Byomic BYO500T microscope /CIOC XDS-1 invert.
Byomic ST-340 stereomicroscope
Olympus BHM Metallurgical Microscope
Canon EOS 7D Mark II / Canon MP-E65
Cognisys StackShot
www.ngvm.nl

Jan l'Amie
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Post by Jan l'Amie »

One of my Micrasterias rotata

Image
Byomic BYO500T microscope /CIOC XDS-1 invert.
Byomic ST-340 stereomicroscope
Olympus BHM Metallurgical Microscope
Canon EOS 7D Mark II / Canon MP-E65
Cognisys StackShot
www.ngvm.nl

curt0909
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Location: Pittsburgh, PA

Post by curt0909 »

KDan these are beautiful. Nice work

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