It looks like a dinoflagellate, not a diatom. It is Tripos but I cannot determine species from these images.
Best wishes
Malcolm
The genus is Tripos (Ceratium). Although the specimen has not been preserved well but it might be C. furca, although it is not scientifically correct nor wise to speciate phytoplankton solely out of an image. I used the genus name Ceratium since it is still used widely in many literatures although taxonomic reinstatement of Tripos is official.
Hi,
It can be a phytoplankton (mixotrophic :- autotrophic as well as heterotrophic). As said above, It is a dinoflagellate (Ceratium sp.).
This is a taxa of Dinophyta in the genus Ceratium.
This is not a diatom.
Best regards
Lothar Täuscher from Berlin (Germany)
It can be Ceratium Hirundinella, Ceratium definitively. If you need to go to the specie level go to a phytoplankton identification key book (e.g. Dodge J.D. 1985. Atlas of Dinoflagellates. Farrand Press, London. 119 pp) and use several samples that contain the Ceratium.
Thank you for your reply can you suggest me a phytopkankton identification key.
Hi Kobra Jalali, I updated my answer above including a key book for dinoflagellates that I used on the pass and worked well for me (Dodge 1985), but there are more. Also www.algaebase.org is good too.
As previous answers have already stated, this is not a diatom, but a dinoflagellate belonging to the genus Ceratium.
I already added my answer on May 5, that it is probably Ceratium hirudinella.
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