Good night, esperos your help. I think that may be stentor?
Regards, Francisco.
(https://www.mikroskopie-forum.de/pictures004/164978_6225957.jpg) (http://s1373.photobucket.com/user/catetocateto/media/1_zpsesuw5fpw.jpg.html)
(https://www.mikroskopie-forum.de/pictures004/164978_53937671.jpg) (http://s1373.photobucket.com/user/catetocateto/media/2_zps5zvmxxwe.jpg.html)
(https://www.mikroskopie-forum.de/pictures004/164978_63960900.jpg) (http://s1373.photobucket.com/user/catetocateto/media/4_zpshpyijlds.jpg.html)
Good evening, I upload a video where you can better see the protozoan.
Regards, Francisco.
http://youtu.be/OHMEOQxNz4c
The size would be interesting!
Regards
Rolf
Many grace by Rolf response.
About the size was large, I think it would have between 120 .mu.m and 150 .mu.m or more.
Poorly oxygenated and Spirostomum with water.
Regards, Francisco.