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:

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!

Abuzer Çelekli

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

Anton Lyakh

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

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.