Dear microphotographers:
This spring I once again found a very large number of colonies of the diatom Meridion circulare (I posted an image in March 2007) in a trickle beside a field. Of course, I could not resist to take several pictures, one of which I would like to share here. The diameter of the colony is about 225 µm.
I was really surprised to discover in the same sample several large, about 225 µm long ciliates which apparently had managed to ingest several of the quite large Meridion-colonies. Interestingly, the cells of the colonies still sticked together in the food vacuoles.
Canon Powershot G5, Zeiss Axioskop, Plan-Neofluar 40x/0,75 for the picture of the Meridion colony, Epiplan-Neofluar 20x/0,50 for the ciliate images. Brightfield illumination, picture 3 oblique illumination.
Bernd
Meridion circulare & ciliates
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