Library > Name > Anthophysis

A flagellate colony on a stalk

A colony composed of about ten flagellates is attached to a long brown stalk. The stalk doesn’t move but the two flagella on each flagellate move actively.


Commentary by Prof. Yuji Tsukii, Hosei University
This organism is Anthophysa, a colony of flagellate cells.

It is interesting how the stalk, which is composed of secretions from flagellate cells, becomes thicker toward the root.

Each Anthophysa colony originates from one flagellate cell, and as the number of cells increases and develops into a colony, the amount of secreted material may increase.

It is a little puzzling why the stalk is thicker at the bottom rather than close to the colony.

Sampling Date : 18 October 2009

Sampling Site : Hirose River A  Google Map

A flagellate colony on a stalk (continued)

A colony of flagellates is attached to the top of a brown stalk. Each flagellate in the colony is busily moving its flagella. Frequently, small food particles are attracted to the colony, but some of them get free and escape by moving along its long stalk.


Commentary by Prof. Yuji Tsukii, Hosei University
This organism is Anthophysa, also called Anthophysis.

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

There are other organisms, with slightly different names, such as Bicoeca and Bicosoeca.

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

This is probably because they have been studied in the fields of both protozoology and phycology.

Sampling Date : 18 October 2009

Sampling Site : Hirose River A  Google Map