Ichthyodinium Hollande & J.Cachon, 1952

Holotype species: Ichthyodinium chabelardii Hollande & J.Cachon

Description: Marine endoparasitic, plasmodial dinophyte of fish eggs. First infection stages reported ca. 8 µm diam., a more or less structureless amoeba-shaped cell, growing from uni- to multinucleate plasmodium. First sequence of plasmadivision produces several "primary schizonts" of about 100 µm. After repeated simple transverse fission, large masses of cytoplasm condense around several nuclei and separate from the plasmodium. These "secondary schizonts" again enlarge by food uptake and finally give rise to the last generation of plasmodia. During this time, the egg develops a larva which hatches from the egg; the parasites remaining in the vitelline sac. At this stage, parasites leave the host causing death. After additional 1 or 2 divisions, morphological aberrant dinospores form, probably biflagellate but only one flagellum observed. Fate of dinospores unknown, reinfection of new fish eggs not observed. The development from infection to dinospore formation takes about one day. Parasites of marine clupeid fishes, so far found only in the Mediterranean. If of mass occurrence, Ichthyodinium is potentially of economic importance by destroying nearly 100% of the sardine egg standing crop.

Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 2023-06-20 by E.A. Molinari Novoa.

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: Cavalier-Smith, T. (2017). Kingdom Chromista and its eight phyla: a new synthesis emphasising periplastid protein targeting, cytoskeletal and periplastid evolution, and ancient divergences. Protoplasma 255(1): 297-357, 6 figures, 1 table.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=47308

Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 20 June 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 March 2024

 
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