Pleurosigma

billporter1456 · Post by **billporter1456** » Mon Jul 21, 2014 2:56 pm

My favorite diatom shape. I think it is the most graceful looking diatom. I used to think it was not mobile, but I think I've seen some of them moving in my samples. Thanks for sharing!

microthings · Post by **microthings** » Tue Jul 22, 2014 1:19 am

Very nice specimen and photo.

Gyrosigma · Post by **Gyrosigma** » Tue Jul 22, 2014 10:40 am

Hello Olympusman,
Are you sure of your ID... it looks like gyrosigma...
Was it in fresh or sea water ?

regards

Dominique

Olympusman · Post by **Olympusman** » Tue Jul 22, 2014 12:53 pm

Dominque,
My sample was from fresh water. When I Googled Pleurosigma I found many variations. My initial reference was from "Fresh-Water Biology" 1918 by Henry Baldwin Ward

_Michal_ · Post by **_Michal_** » Wed Jul 23, 2014 9:15 am

Very nice shot

Gyrosigma · Post by **Gyrosigma** » Wed Jul 23, 2014 9:58 am

Hi,
it has very little there pleurosigma in freshwater
I bet it'a a Gyrosigma accuminatum or G attenuatum

look at the raphee between the two genus

regards

Dominique