Acta Protozoologica

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Trichodina diaptomi (Ciliophora: Peritrichia) from Two Calanoid Copepods from Botswana and South Africa, with Notes on its Life History

Publication date: 28.11.2016

Acta Protozoologica, 2016, Volume 55, Issue 3, pp. 161 - 171



Deidre West
Department of Zoology and Entomology, University of the Free State, Bloemfontein, South Africa
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Linda Basson
Department of Zoology and Entomology, University of the Free State, Bloemfontein, South Africa
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Jo Van As
Department of Zoology and Entomology, University of the Free State, Bloemfontein, South Africa
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Members of the genus Trichodina are mostly found on fish, but have also been recorded from a variety of other aquatic organisms, including calanoid copepods. So far, it appears that all the trichodinid populations collected from calanoids in various parts of the world are the same species, i.e. Trichodina diaptomi Šrámek-Hušek, 1953. This paper reports on a new record of T. diaptomi from Metadiaptomus meridianus in a large reservoir in South Africa, as well as on a new host species, Metadiaptomus transvaalensis, and the first record of T. diaptomi from pools in an ephemeral river in northern Botswana, therefore adding a new country to the distribution of this species. We used the history of the discovery of T. diaptomi in different parts of the world and came to the conclusion that it is a cosmopolitan species, exclusively associated with copepods of the order Calanoida. Based on existing information, T. diaptomi does not appear to have a reservoir host. Against this background, we provide a discussion on the possibility that, although no dormant stage has been recorded for any trichodinid, it may be possible that T. diaptomi possesses some form of diapause and that this might be related to that of calanoid copepods.


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Information: Acta Protozoologica, 2016, pp. 161 - 171

Article type: Original research article


Department of Zoology and Entomology, University of the Free State, Bloemfontein, South Africa

Department of Zoology and Entomology, University of the Free State, Bloemfontein, South Africa

Department of Zoology and Entomology, University of the Free State, Bloemfontein, South Africa

Published at: 28.11.2016

Article status: Open

Licence: None

Percentage share of authors:

Deidre West (Author) - 33%
Linda Basson (Author) - 33%
Jo Van As (Author) - 34%

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