156,863 species and infraspecific names are in the database, 22,034 images, 60,611 bibliographic items, 450,453 distributional records.

Actiniscus (Ehrenberg) Ehrenberg, 1843

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

Holotype species: Actiniscus pentasterias (Ehrenberg) Ehrenberg

Original publication and holotype designation: Ehrenberg, C.G. (1843). Über die verbreitung des jetzt wirkenden kleinsten organischen lebens in Asien, Australien und Afrika und über die vorherrschende bildung auch des oolithkalkes der Juraformation aus kleinen polythalamischen thieren. Ber. Verh. Preuss. Akad. Berlin 1843: 100-106.

Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as masculine.

Most recent taxonomic treatment adopted: Moestrup, Ø. & Calado, A.J. (2018). Süßwasserflora von Mitteleuropa. Freshwater Flora of Central Europe, Volume 6: Dinophyceae. pp. [i]-xii, [1]-560, 421 figs. Berlin: Springer Spektrum.

Description: Slightly compressed biflagellated cells of medium-sized (30-70 µm) with a slightly displaced cingulum and well-developed sulcus giving the cells an appearence of Gymnodinium Stein. Differs from Gymnodinium by the presence of siliceous internal skeleton composed of 2 equal parts composed of a ring from which 5 (4-8) star-like arms radiate. No chloroplasts, nucleus enclosed in the internal skeleton. Marine plankton, of worldwide distribution

Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 16 Oct 2018 by M.D. Guiry.

Comments: According to Bérard-Therriault et al. (1999: 163) this genus is a member of the family Actiniscaceae. Popovsky & Pfiester (1990: 122) concurs with this view.

Numbers of names and species: There are 36 species names in the database at present, as well as 1 infraspecific names. Of the species names, 6 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.

References
Popovsky, J. & Pfiester, L.A. (1990). Süßwasserflora von Mitteleuropa. Vol. 6. Dinophyceae (Dinoflagellida). pp. 1-272. Jena & Stuttgart: Gustav Fischer.

Carty, S. (2003). Dinoflagellates. In: Freshwater Algae of North America, Ecology and Classification. (Wehr, J.D. & Sheath, R.G. Eds), pp. 685-714. San Diego: Academic Press.

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

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.

Created: 07 May 2002 by M.D. Guiry

Verified by: 16 October 2018 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44606

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 November 2019.

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