Greuetodinium A.R.Loeblich, 1980

Holotype species: Greuetodinium cylindricum (Greuet) Loeblich III

Original publication and holotype designation: Loeblich, A.R., III (1980). Dinoflagellate nomenclature. Taxon 29: 321-324.

Description: Unicellular free-living medium-sized to large (about 115 µm long without "piston") biflagellated, heterodynamic cells. Characterized by a cylindrical cell shape more than 2 times longer than broad with an apical ocelloid composed of about 15 crystalline "hyalosomes". Cingulum starts just under the ocelloid, turning - in contrast to most other dinoflagellates - to the right. making about half a loop before bending posteriorly, running vertically down about more than half of the cell length before once more bending to the right, ending at the left antapical side on a tentacle-like projection. From the central part of the cell a special tentacle-like organelle, the "piston" is directed posteriorly. This organelle is comparable to that of Erythropsidinium. Large ovoid dinokaryotic nucleus in the upper part of the cell. Chloroplasts absent. Cells several times infected by the parasitic dinoflagellate Amoebophrya. Sexual reproduction and cyst formation so far not reported. Habitat: Marine plankton, so far recorded only from the Mediterranean Sea.

Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 2021-11-11 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: 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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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44646

Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 11 November 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 16 April 2024