What is going on with this Rotifer?

[Javier]

Hi,

I found this Rotifer some time ago. I recall thinking that there was something strange about it, because it seemed to have debris attached to it. Having a closer look to the video, I realize that there is something else going on. There seems to be a two segment shell, because when the Rotifer stretches or shrinks, the shell does not follow the movement. I think I've heard of some Rotifers living in a shell, but when this Rotifer shows its foot there is nothing covering it.

Do you notice the same thing? Any ideas?

TIA,
Javier.

[Luis Carlos]

Nice video!
This is Rotaria tardígrada, in this rotifer the cuticle is usually covered with debris. It is a Bdelloid rotifer without lorica.
Another view of this rotifer:
https://youtu.be/uDaA6_vp2sY

[Javier]

Muchas gracias, Luis Carlos!

Your video is so impressive, thanks for sharing it.