Library > Name > Peranema

Solitary journey

The body of this flagellate is long and thin, and its single flagellum extends forward and remains stiff, except for actively vibrating the very tip. Occasionally the flagellate contracts its body to change directions, but usually it travels in a straight line.


Commentary by Prof. Yuji Tsukii, Hosei University
This flagellate belongs to genus Peranema, most likely Peranema trichophorum, but there is scarce research available about this genus.

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

In the field, we can see flagellates in the Peranema genus that are clearly different from P. trichophorum, but unfortunately names have not been assigned to all the individual species.

Sampling Date : 08 August 2009

Sampling Site : Hirose River A  Google Map

Solitary journey (enlarged)

The body of this flagellate is long and thin, and its single flagellum extends forward and remains stiff, except for actively vibrating the very tip. Occasionally the flagellate contracts its body to change directions, but usually it travels in a straight line.


Commentary by Prof. Yuji Tsukii, Hosei University
This flagellate belongs to genus Peranema, most likely Peranema trichophorum, but there is scarce research available about this genus.

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

In the field, we can see flagellates in the Peranema genus that are clearly different from P. trichophorum, but unfortunately names have not been assigned to all the individual species.

Sampling Date : 08 August 2009

Sampling Site : Hirose River A  Google Map

A flexible flagellate

The body of this slender flagellate is 100 microns long and its single flagellum is about the same length. The organism actively moves among particles, and flexibly changes its shape to fit inside narrow spaces.


Commentary by Prof. Yuji Tsukii, Hosei University
This organism is Peranema belonging to the Euglena group, and probably Peranema trichophorum. However, information about Peranema is very limited. Although Wikipedia lists more than ten species, there are no further descriptions beyond the names. Only one species, Peranema trichophorum, is described in a standard taxonomical book on protistology. Therefore we have no knowledge of the key characteristics of other species. However, 2 or 3 species shown in the following link are obviously different from P. trichophorum.

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

Sampling Date : 28 May 2009

Sampling Site : Hirose River B  Google Map

A flexible flagellate changing its shape

This slender flagellate is 100 microns in length, with a flagellum almost as long at the top. The organism actively moves around swinging its flagellum in front. When it moves in a new direction, the soft, flexible body changes its shape. The rear end of this flagellate is square, unlike the tapered rear end of similar type of flagellates.


Commentary by Prof. Yuji Tsukii, Hosei University
This organism is Peranema belonging to Euglena group. It is probably Peranema trichophorum.

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

Sampling Date : 28 May 2009

Sampling Site : Hirose River B  Google Map