Oodinium Chatton, 1912

Holotype species: Oodinium pouchetii (Lemmermann) Chatton

Original publication and holotype designation: Chatton, E. (1912). Diagnose préliminaires de Péridiniens parasites nouveaux. Bulletin de la Société Zoologique de France 37: 85-93, 8 figs.

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Description: Ectoparasitic dinoflagellate of marine invertebrates. Gymnodinium-like spores infest the host, forming a peduncular medulla which penetrates the host epithelium by vase-like invaginations joined with membranous channels. Food uptake apparently by resorption after extracellular lysis of host material. The ovoid to sack-like trophont, which may be up to 400 µm, may have thecal plates in its amphiesma. After termination of food uptake, it detaches from the host and begins several subsequent binary fissions. The smaller division products resemble the mother cells without flagella. The nucleus and chromosomes do not show typical dinokaryotic structure, resembling a very large eukaryotic nucleus. Only after several divisions, do typical dinokaryotic chromosomes appear; thus, after the last division, the resulting flagellated dinospores exhibit a typical dinokaryon. Amphiesma brown-to-yellowish, but no chloroplasts. Ectoparasitic on marine Appendicularia, Chaetognata, Cnidaria, Ctenophora.

Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 2018-08-24 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Kawai, H. & Nakayama, T. (2015). Introduction (Heterokontobionta p.p.), Cryptophyta, Dinophyta, Haptophyta, Heterokontophyta (except Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae, Phaeophyceae, Eustigmatophyceae), Chlorarachniophyta, Euglenophyta. In: Syllabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. Ed. 13. Phototrophic eukaryotic Algae. Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Haptophyta, Heterokontophyta/Ochrophyta, Chlorarachnniophyta/Cercozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 11-64, 103-139. Stuttgart: Borntraeger Science Publishers.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=44936

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 24 August 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 17 August 2022

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