I think this is the rotifer Conochilus unicornis.
Interesting pictures!

Franz

The last picture: I think this is the aquatic fungus Saprolegnia (Oomycota).

Regards
Franz

Sorry. Not from the Gastrotricha but from the TARDIGRADA. (I did'nt know how to correct my massage!)

Franz

Beautiful pictures! Congratulation!
The "bottle" could be the "skin" of an animal of the Gastrotricha with its eggs.

Franz

Very interesting in these pictures are also the bacteria embedded in the mucilage. They always stand at a right angle to the body of the alga (90°). You can see this often in the mucilage of other algae. Are these symbionts?

Franz

Maybe the genus Spondylosium (which has 21 species)
Beautiful pictures. Congratulation!

Franz

Probably Arcella, but inside the Arcella is a (blue-green?) alga

interesting picture!

Franz

Hello Rafael,

I would like to know if you make these pictures with an electronic flash, because the cilia are so clear. If I remember well the camera was a Canon 80, and the exposing time?

Franz

Hello Rafael!

Congratulations for your pictures! This is Zoothamnium pelagicum - a very interesting protozoon from the peritricha (with symbiontic bacteria).

Thank you very much for sharing!
Franz

Hello Rudi,

I think this is a Statoplast (a "winter egg") from a freshwater bryozoan.
An interesting picture!

Franz

Thank you Charles and pwnell ! Piermicro : You asked me "Dove le hai trovate così numerose?" (Where did you find so many?) This was a little adventure! I saw near the sea a pond with brakish water. Part of the pond was evaporated, but left in the sand a green line. I took a little bit of the "green"...

Thank you for your answers. carlos.uruguay: I use a Pentax K20D zzffnn: "How did you achieve that Franz?" - I put a coverglass (24x60 mm) on the surface of the water from the sample. Because of the surface tension the coverglass does not sink. This method is very useful for me. I use it also for oth...

I would be happy to know more about this Euglena, species ecc. I found it in brackish water. One Euglena was 60 µm long.
Two pictures.

Franz

I think the genus is Amphora. I found it in freshwater.


Franz

Hello Dominique and Renè: I dont have a picture from the striae, because the objective with the highest magnification I have is a 40x: The good objectives with 60x or 100x magnificaticion from Nikon (with 210 tubelength) are terribly expensive for me.

75RR: Thank you for your answer!

Franz