Anyone care for a guess??
(https://www.mikroskopie-forum.de/pictures003/103667_2543004.jpg)
Best wishes, René
Hallo René
Ich vermute eine "Faden"Alge.
Kurt
Hallo René,
a diatom spore, I think....
well, the first Kudo for Raymond. It shouldn't be hard now to get to the genus level, and I'll show the rest of the image.
Best wishes, René
Hallo René
This ia a auxospore form Chaetoceros
Greetings
Jan
Hallo, Rene.
Attheya zachariasi. Ich habe so etwas auch grade im Plankton des Hattsteinweihers gesehen.
Schönen Gruß ais dem Hintertaunus
Holger
Well, here's a larger part of the image:
(https://www.mikroskopie-forum.de/pictures003/103798_16373066.jpg)
Jan is right, it is Chaetoceros, a marine species of centric diatoms. Spore formation is pretty common in this genus, and very useful for correct identification to species level. In this case, the spore is very characteristic for Chaetoceros lorenzianus. Without the spore, it is often hard to discriminate the vegetative state of this species with C. decipiens, also a pretty common sp. in Dutch and Deutsch coastal waters.
Kurt and Holger, thanks for your input. The outline in the first image could indeed have been mistaken for Attheya. Unfortunately, I have never had the luck to observe Attheya resting spores.
Best wishes, René