Morphotype D
Oscillatoria irrugua

 

    Morph. Taxon Name Obs.Width Calyptra Granules DkRefr. Necridia Observed Description
4 D Oscillatoria irrugua 7.5-9.5 Yes Maybe Yes Maybe Trichomes between 7.5-9.5 µm in width, sometimes surrounded by a sheath. Dark, refractory surface obscures the cell interior. Cell walls thin. Terminal cell often with a calyptra.

Click on any image below to enlarge. scalebar is 10 µm