163,778 species and infraspecific names are in the database, 22,783 images, 63,043 bibliographic items, 481,364 distributional records.

Dissodinium Klebs, 1916

Empire Eukaryota
Kingdom Chromista
Subkingdom Harosa (supergroup SAR)
Infrakingdom Halvaria
Phylum Miozoa
Subphylum Myzozoa
Infraphylum Dinozoa
Superclass Dinoflagellata
Class Dinophyceae
Order Gymnodiniales
Family Gymnodiniales incert. sed.

Holotype species: Dissodinium lunula (Schütt) Klebs

Original publication and holotype designation: Pascher, A. (1916). Studien über die rhizopodiale Entwicklung der Flagellaten. Archiv für Protistenkunde 36: 82-136.

Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as neuter.

Description: Ectoparasitic dinophytes of copepod eggs. Infective spore settles on egg, penetrates the wall with a peduncle and holdfast organelle, starts myzocytotic food uptake. Parasite gradually enlarges, finally reaching the size of the copepod egg. After food uptake has terminated, parasite produces a primary cyst wall. Nuclear division precedes cytoplasmic division. Inside the primary cyst wall, 4-16 secondary lunate or ovoid cysts form. Each secondary cyst forms 4-16 dinospores, which are released into the water and may encyst again. After 1-2 days, new copepod eggs may be invaded. Type species has chloroplasts which increase in number during sporogenesis, suggesting phototrophic dinospores; the second species lacks chloroplasts. This complex life cycle with alternation of primary and secondary cysts and with the latter producing dinospores, caused confusion with similar coccoid stages of some nonparasitic obligate phototrophic and bioluminescent species of Pyrocystis Murray ex Haeckel. Ectoparasites of copepod eggs in marine temperate to tropical, mainly coastal, waters, including the Baltic Sea.

Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 13 Oct 2020 by M.D. Guiry.

Comments: Dodge (1982: 257) cites this genus as being a member of the Family Dissodinaceae.

Numbers of names and species: There are 18 species names in the database at present, as well as 3 infraspecific names. Of the species names, 2 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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.

Created: 07 May 2002 by M.D. Guiry

Verified by: 13 October 2020 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44639

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 17 October 2021.

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