mystery object

[Rene]

Time for a little quiz, anyone? UV-fluorescence, crop is 50x50um with Olympus 20x/0.7.

Best wishes, Rene.




This topic is also placed on photomacrography.net, as the images are hosted there.

[Roderich Römhild]

Das sieht für mich aus wie eine Qualle. Bin mir jedoch nicht ganz sicher.

[Hugo Halfmann]

Hallo Rätseler,

eine Qualle in der Größe 5/100mm, gibts das (Die Frage ist ernst gemeint !)
Ich kenne solche Viecher vom Tauchen, die haben aber Taubenei bis Hühnereigröße und fluoreszieren auch wenn man sie anleuchtet.

Ich tippe auf einen Flagellaten.

[Jürgen Boschert]

Hallo,

eine Diatomee, z.b. Surirella ?

Gruß !

JB

[Rene]

Hallo Roderich, Hugo,

Eine Qualle ist es nicht, at this scale jelly fish look little like Vorticella buds, but with hairy tufts (one of those in focus at 7 o'clock):


(Olympus 60x/1.4)

The pinky colour I have added myself

Rene

[rhamvossen]

Hallo Rene,

In de foto links boven zie ik een huidmondje  . Maar dat zal 't vast niet zijn. Gr,

Rolf

[reblaus]

Hallo -
Nesselkapsel einer Qualle ind "abgeschossenem" Zustand !?
Gruß
Rolf

[Jan Kros]

Hallo René

Ist es ein Dinoflagellat in fluoreszens
Greetings
Jan

[Rene]

Indeed, Jan. The fluorescence is due to the optical brightener calcofluor white, which stains the cellulose parts of the dinoflagellate.

Now, this was a difficult one, I admit. With the corresponding brightfield images one should be able to get to genus:





Best wishes, Rene.

[Rene]

Still no bells ringing?? I pushed it over with my needle, now it should make more sense:




It's the dinoflagellate Dinophysis rotundata from the North Sea, the diatom left to it is Rhizosolenia (=Guinardia) delicatula. Not one of the dinoflagellates that needs fluorescent staining for identification, but I have never had the luck before that it stood exactly on it's 'head' and the fluorescent staining made some details (especially pores) visible.

This is a heterotrophic sp while most other Dinophysis sp are autotrophic. It is a parasite by sucking the contents out of its (living) prey with a straw. Yuk!

Next time better luck guessing,
Rene