Systematic Parasitology

, Volume 90, Issue 2, pp 125–135 | Cite as

The molecular phylogeny of the type-species of Oodinium Chatton, 1912 (Dinoflagellata: Oodiniaceae), a highly divergent parasitic dinoflagellate with non-dinokaryotic characters

  • Fernando Gómez
  • Alf Skovgaard


Oodinium pouchetii (Lemmermann, 1899) Chatton, 1912, the first described parasitic dinoflagellate, is the type of the Oodiniaceae Chatton, 1920. In the taxonomical schemes, this family of metazoan parasites includes Amyloodinium Brown & Hovasse, 1946 and Piscinoodinium Lom, 1981 that are responsible of important damages in fish aquaculture. Species of Oodinium Chatton, 1912 have unique characteristics such as the possession of both non-dinokaryotic and dinokaryotic nuclei within the life-cycle, and the absence of the transversal (cingulum) and longitudinal (sulcus) surface grooves in the parasitic stage. We provide the first molecular data for the genus Oodinium from specimens of O. pouchetii infecting the chordate Oikopleura sp. (Tunicata: Appendicularia) off the coasts of Brazil. Although O. pouchetii lacks dinokaryotic characters in the parasitic stage, the SSU rDNA phylogeny revealed that it forms a distinct fast-evolved clade that branches among the dinokaryotic dinoflagellates. However, there is no clear relationship with other dinoflagellates. Hence, the taxonomic affinity of the family Oodiniaceae is unclear at the moment.


Settling Chamber Environmental Sequence Environmental Clone Thecal Plate Bayesian Consensus Tree 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



F.G. was supported by the Brazilian Conselho Nacional de Desenvolvimento Científico e Tecnológico (grant no. BJT 370646/2013-14). A.S. was supported through the project IMPAQ - IMProvement of AQuaculture high quality fish fry production, funded by the Danish Council for Strategic Research (Grant No. 10-093522).

Supplementary material

11230_2014_9538_MOESM1_ESM.pdf (500 kb)
Supplementary material 1 (PDF 499 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.Laboratory of Plankton Systems, Oceanographic InstituteUniversity of São PauloButantãBrazil
  2. 2.Department of Veterinary Disease Biology, Faculty of Health and Medical SciencesUniversity of CopenhagenFrederiksberg CDenmark
  3. 3.Department of Environmental, Social and Spatial ChangeUniversity of RoskildeRoskildeDenmark

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