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Acta Protozoologica

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On the Enigmatic Hook of the Metaradiophryids (Alveolata, Ciliophora)

Publication date: 17.02.2016

Acta Protozoologica, 2016, Volume 55, Issue 1, pp. 1 - 5

https://doi.org/10.4467/16890027AP.16.001.4042

Authors

,
Klaus Hausmann
Research Group Protozoology, Institute of Biology/Zoology, Free University of Berlin, Berlin, Germany
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,
Gerd Günther
Private Microscopical Laboratory, Düsseldorf, Germany
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,
Diana Lehmann
Research Group Protozoology, Institute of Biology / Zoology, Free University of Berlin, Berlin, Germany
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Renate Radek
Institute of Biology/Zoology, Free University of Berlin, Berlin, Germany
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Abstract

The astomatous metaradiophryids are ciliates which live endosymbiotically in earthworms (Annelida, Lumbricidae). Their prominent hook apparatus is demonstrated in detail in light micrographs of living organisms as well as in scanning electron micrographs of Parducz-fixed cells. Since it was first observed, this structure has been interpreted as a ‘holdfast’ organelle preventing ciliates from being expelled prematurely from the intestine of the worm along with its excrements. No active movement of the hook has been reported in earlier papers or in our recent studies. Nevertheless, a detailed description of different parts of the hook apparatus exists in older literature, including a hypothesis on how these elements interact with each other to function as a holdfast device – without any experimental evidence. The suspected mode of function of this structure is questioned and critically discussed.

References

REFERENCES

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Information

Information: Acta Protozoologica, 2016, pp. 1 - 5

Article type: Original research article

Authors

Research Group Protozoology, Institute of Biology/Zoology, Free University of Berlin, Berlin, Germany

Private Microscopical Laboratory, Düsseldorf, Germany

Research Group Protozoology, Institute of Biology / Zoology, Free University of Berlin, Berlin, Germany

Institute of Biology/Zoology, Free University of Berlin, Berlin, Germany

Published at: 17.02.2016

Article status: Open

Licence: None

Percentage share of authors:

Klaus Hausmann (Author) - 25%
Gerd Günther (Author) - 25%
Diana Lehmann (Author) - 25%
Renate Radek (Author) - 25%

Article corrections:

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Publication languages:

English

View count: 32

Number of downloads: 16