Could you identify this planktonic microorganism?

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Syed Abbas Jafar

Anton:

Kindly provide well focused pictures. Not too sure but suspect this to be a Spore / Pollen grain.

Best

Syed

Abuzer Çelekli

Hi, it is a phytoplankton. It is not clear a photo.

Best regards

Anton Lyakh

Unfortunately, it is only photo I have.

It is a flagellat colony microalgae.

Abuzer:

Looking at the quality of image, how do you recognize this as a Phytoplankton or Microalgae? What are you suggesting?

Abhishek Mukherjee

Dear Anton,

Although the image is out of focus and needs a bit of an upgrade or even a better resolution, I think it could be a detached or isolated cell of species of Melosira, since it has been document from Black sea before .

The attached image is from

or,

It is a cyst of Scrippsiella trochoidea, which is also observed in thses waters

The corresponding attached image is from

I sincerely wish that the appended images help you towards the accurate identification of the taxon since you have observed the specimen under microscope and I have to be content with the image posted.

Regards

Dr. Abhishek Mukherjee

Ines Galović

I agree with Syed and Abuzer regarding to unclear pic. To me, based on species morphology and dimension, it looks like Archaeomonas species i.e. A. hungarica or A. pseudoformosa I found similar article where you can check how this genus looks like: Article Modern Archaeomonadaceae from the land-fast ice off Adélie L...

Best wishes!

It is a Melosira as a colony form. Pigmentation indicated diatom. It is needed to make permanant slide for the identification of diatom to see the frustule.

best regards

Thank all of you. As I understand the photo don't allow to accurate identify this organism. I suggest that it has the shape of a sphere with outgrouws, and is similar to a spore of unknown microalgae, like those:

http://www.mikrotax.org/Nannotax3/index.php?taxon=Scrippsiella%20acuminata&module=non_cocco

According to pigmentation, Archaeomonas species belongs to Chrysophyta as well.

You need to determine the mineral composition of the solitary specimen (Organic, Siliceous or Calcareous), which seems difficult at this stage. No point in making wild speculations.