Euglena comes in and out of aggregate

Several Euglena organisms go in and out of a large aggregate as if it were a comfortable residence for them.

Commentary by Prof. Yuji Tsukii, Hosei University
The organism may be Euglena viridis, but because the shape of the chloroplasts is vague in this video, the species level cannot be determined.

http://protist.i.hosei.ac.jp/PDB/Im.....

Sampling Date : 02 July 2009

Sampling Site : Hirose River A  Google Map

A Euglena from a paddy field

After being collected from a paddy field, the sample was put on 1% agar plate with a drop of distilled water and kept for a few days.

Organisms in the Euglena group are often found in nature. The one in this video moves too quickly for a clear picture even at a low magnification.

Commentary by Prof. Yuji Tsukii, Hosei University
This organism is a Euglena, and its shape and way of moving suggests that it may be Euglena viridis.

http://protist.i.hosei.ac.jp/PDB/Im.....

However, this organism is nearly 100μm long, which is longer than the usual 40-70μm cell length of E. viridis, so it could belong to another larger species.

To determine whether or not this organism is E. viridis, the shape of the chloroplast must be examined, but unfortunately it cannot be seen clearly in this video.

Sampling Date : 17 November 2006

Sampling Site : KASHIMADAI paddy field  Google Map