Have you thought of phototrophic bacteria?
The inside looks like sulfur granules to me. If it turns the pond water
pink, there must be many in the open water column. So they ought to be
photosynthetic primary producers.
Have a look in "The Prokaryotes" for pictures of phototrophic bacteria.
HTH, Jan.
Jan Kreft Phone +44 (0)29 20875278
Cardiff School of Biosciences Fax +44 (0)29 20874305
Cardiff University E-mail Kreft at cardiff.ac.uk
PO Box 915, Cardiff CF10 3TL, UK http://www.cf.ac.uk/biosi/staff/kreft
On 20 Jul 2001, Heaton, Karen wrote:
> We have an unidentified pink flagellate we are trying to ID. It is from
a water
> sample from a pond near London. There are high numbers of bacteria in the
> sample, a high concentration of this flagellate (which is actually
turning the
> water pink) and a few rotifers.
>
> It appears to have no autofluorescence or chloroplast (under epi) but
the outer
> surface is a pink colour. Apparently the pond it was taken from smells of
> garlic.
>
> We wondered if it was a cryptomonad like chilomonas - but cant find much
> about them being coloured.
>
> It is elongated/ovoid with we think only 1 long flagella. It is very
> symmetrical (sort of cigar shaped) and seems to be dividing bilaterally. It
> approx. 20 - 100 microns in length. It is swimming very actively. Before we
> dapi stained (and could then see the flagellum) it appeared to be more of a
> cilliate type of movement because it was twisting.
>
> It appears to be packed with granules, but we can't see a nucleus when we
> DAPI stain it.
>
> Has anyone seen this critter before? Pictures can be viewed on a website.
>
> Any help would be appreciated.
>
> Thanks
>
> Karen
>
> http://website.lineone.net/~pink.flagellate/
>
>
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