[coccoliths] mystery?

[sh081 at kdw.kj.yamagata-u.ac.jp]

Dear Jean

I think they belong to a testate amoeba. There are many examples of 
similar forms in both marine and freshwater.
And look at the cell size - it is too big for a coccolithophorid.
If I had time I could find a genus name for you.

Best wishes

Ric


----- Original Message -----
> Hi all,
> 
> These are SEM images of calcareous spheres from Lake Fryxell, 
Antarctica.
> The balls are calcareous, hollow, and about 10 to 20 microns in size.  
They
> were collected from below several meters of water and ice; the water 
is
> brackish and supersaturated in CaCO3.
> 
> Has anyone seen anything like this before?  Any ideas as to what these 
are?
> 
> Cheers,
> Jean
> 
> Jean M. Self-Trail
> U.S. Geological Survey
> 926A National Center
> Reston, VA 20176
> 703-648-6013
> 
> There is no sin but ignorance
> *Marlowe*
>  
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