Journey of amoeba with particles

A hidden amoeba extends several slender pseudopodia from behind the end of one particle. As the amoeba comes to other particles, it extends pseudopodia from behind the one of particle. As the amoeba never shows itself completely, we cannot recognize where it is. In the meantime the amoeba and several particles begin journey to another place together with a colony of flagellates.

Commentary by Prof. Yuji Tsukii, Hosei University
Two types of amoeba take turns appearing in this video.

The first one is Vexillifera.

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

The second one, which is in a shell covered with black particles, may be Diaphoropodon.

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

Diaphoropodon is characterized by fine spiny projections on the surface of its shell, but to see these projections clearly requires higher magnification and resolution.

Sampling Date : 09 August 2009

Sampling Site : Hirose River B  Google Map

Encountering of two different amoebae I

Here a large amoeba is actively hunting and catching food one by one. After a while, a different amoeba appears in our field.

Commentary by Prof. Yuji Tsukii, Hosei University
The first amoebae to appear may be Vexillifera or a floating Vannella.

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

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

Amoebae appearing later may be Diaphoropodon, which is in a shell covered with black particles.

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

Diaphoropodon is characterized by fine spiny projections on the surface of its shell, but to see these projections clearly require higher magnification and resolution.

Sampling Date : 09 August 2009

Sampling Site : Hirose River B  Google Map

Encountering of two different amoebae II

Two kinds of amoebae of different size and shape are coming in contact with each other, and then move away.

Commentary by Prof. Yuji Tsukii, Hosei University
The amoebae shown in the upper part of the video may be Vexillifera or floating Vannella.

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

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

The amoebae appearing later may be Diaphoropodon, which is in a shell covered with black particles.

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

Diaphoropodon is characterized by fine spiny projections on the surface of its shell, but to see these projections clearly requires higher magnification and resolution.

Sampling Date : 09 August 2009

Sampling Site : Hirose River B  Google Map