A friend of mine brought back from the mud of Lake Myvatn.
Another friend has handled this mud that can be observed diatoms.
Some friends have given the names of some specimens that follow.
(Epithemia zebra)
(Pinnularia borealis)
(Eipthemia sorex)
(Navicula radiosa & Fragilaria construens (small one))
(Cymbella sp)
(detail of Cymbella)
There are still many species.
), but I didn't think in collecting mud when I visited it 
