A round green flagellate

A round green flagellate is standing still. The body seems to be slightly hard and the flagellum at the front is moving, though not actively. When observed at high speed in a time-lapse video, the body contents are rotating slowly.

Commentary by Prof. Yuji Tsukii, Hosei University
As the structure of the surface and inside of the cell cannot be detected clearly, it is difficult to know to what group this organism belongs.

But there are two possibilities: it may belong to either genus Chlamydomonas,

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

or genus Lepocinclis.

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

Sampling Date : 18 October 2009

Sampling Site : Hirose River A  Google Map