Movement symbiosis

Micrograph of the fermentation chamber-flagellate Mixotricha paradoxa. The wood pieces are clearly visible within the cell. Four flagella are weakly visible at the apex.
Mixotricha paradoxa is one of the largest flagellates within the fermentation chamber. It can be found in the Darwin-termite Mastotermes darwiniensis in northern Australia. The ciliate belongs to the archaic group of archaeozoa. It has four quite weak flagella, which only serve as a rudder. The real locomotion, even it is very sedate, is caused by symbiotic bacteria strongly attached on the surface of the protistan cell. They are visible as a fine egde at the left side of the picture.

So far, this kind of movement-symbiosis between eukaryots and procaryots is unique.

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