the marine diatom Detonula pumila (?) ed.: Lauderia annulata

Images made through a microscope. All subject types.

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Franz Neidl
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the marine diatom Detonula pumila (?) ed.: Lauderia annulata

Post by Franz Neidl »

I would be glad to know if this is the marin diatom Detonula pumila.
The whole chain was 240 µm long.
two pictures:
Obj. 40x, DIC
Obj. 20 Ph, crop
marine plankton



Last edited by Franz Neidl on Tue Jan 24, 2012 1:56 pm, edited 1 time in total.

Posts: 467
Joined: Sun Oct 08, 2006 4:22 am

Post by René »

No, that's Lauderia annulata. It is sometimes hard to see the difference as the connecting process between two cells of Detonula is not always good visible. But there are two other signs in your images: the mucus from the marginal processes spreading out, away from the cells, and the nucleus, which in Lauderia always is symmetrically spread to both sides (typically with a nucleolus at both cell ends). In Detonula it is concentrated in one end of the cell.

Best wishes, René

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