I work with phytoplankton and we keep finding these strange cells that have
lovely chloroplasts but no frustule. 50% of time they are associated with a
membrane of the sort in the first photo.
We cannot place them, and as we perform community analysis, it would be
useful for us to place them in some taxa or other, or to at least eliminate them
from our counts once and for all!
Maybe they are a life stage of a macro algae.
This forum was recommended to me as a place I might find an answer.
Yours curiously (and on behalf of five other curious phytoplankon taxonomists)
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