Amphora Diatom

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cuxlander
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Amphora Diatom

#1 Post by cuxlander » Sat Sep 09, 2017 9:10 am

Hello,
I am showing a pretty Amphora cf. copulata:

Image

Size 60 µm, 60x Achromat, transmitted light, stack of 3.

I was wrong here, the sideview is of a cymbella, not an amphora:

Image
Thank you actinophrys for drawing my attention

Greetings,
Hans


(corrected error on 10.9.)
Last edited by cuxlander on Sun Sep 10, 2017 5:06 pm, edited 1 time in total.

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mrsonchus
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Re: Amphora Diatom

#2 Post by mrsonchus » Sat Sep 09, 2017 11:52 am

Superb images - congratulations my friend!

Great to see the living-thing (or at least one including 'contents'). Adds a lot of information and interest I think.

Thanks for these lovely pictures - I don't suppose you have any more, perhaps different view-point or species.....

Excellent!

John B :D :D :)
John B

billporter1456
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Re: Amphora Diatom

#3 Post by billporter1456 » Sat Sep 09, 2017 12:59 pm

Very nice indeed! :o

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IanW
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Re: Amphora Diatom

#4 Post by IanW » Sat Sep 09, 2017 1:30 pm

Absolutely superb Hans. Thanks very much!
Zeiss Jena NF, Zeiss Standard 18 and WL

billbillt
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Re: Amphora Diatom

#5 Post by billbillt » Sat Sep 09, 2017 2:26 pm

This is great!.. How did you manage to get a side view?... Wonderful photos!..

BillT

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cuxlander
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Re: Amphora and Campylodiscus Diatoms

#6 Post by cuxlander » Sun Sep 10, 2017 9:47 am

Hello,
and thanks for your kind comments.
@BillT: They were all on one slide. Books told me its the same species. But seebelow postings!
@JohnB: Generally my equipment is not overgood with Diatoms (I'm specialising in testate amoebae). The fine structure of most silicon cells require better equipment such as DIC, which I do not have. And yes, they were alive, Diatom-chloroplasts are yellowish brown.
Like this Campylodiscus hibernicus (not overgood photos):
Image

and the saddlelike sideview:

Image

Cheers,
Hans
Last edited by cuxlander on Sun Sep 10, 2017 5:24 pm, edited 1 time in total.

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actinophrys
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Re: Amphora Diatom

#7 Post by actinophrys » Sun Sep 10, 2017 4:00 pm

The first diatom is a very nice Amphora, but they don't really have that sort of side to sit on. It's true the isolated valves are crescent-shaped, but in an intact cell they are tilted apart to face the same way; compare for instance an SEM. Your second photo shows no sign of that shape, but sits like a diatom where the valves are more parallel, and I think is a Cymbella.

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cuxlander
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Re: Amphora Diatom

#8 Post by cuxlander » Sun Sep 10, 2017 5:02 pm

Hello Actinophrys,

You are of course right, my second specimen (the sideview) is definitely a Cymbella sp. Here is a drawing by Hustedt (1930), showing the typical shape of the cymbella-chloroplasts:
Image
I am not too experienced as far as diatoms are concerned and jumped to the wrong conclusion as both shapes were the only quite numerous ones on my slide. I'll correct my first posting.

Thanks for the correction,
Hans

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vasselle
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Re: Amphora Diatom

#9 Post by vasselle » Tue Sep 19, 2017 12:13 am

Bonjour
Jolies images
Microscope Leitz Laborlux k
Boitier EOS 1200D + EOS 1100D

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