Ostreopsis Johs.Schmidt, 1901
Holotype species: Ostreopsis siamensis Johs.Schmidt
Original publication and holotype designation: Schmidt, J. (1901). Flora of Koh Chang. Contributions to the knowledge of the vegetation in the Gulf of Siam. Peridiniales. Botanisk Tidsskrift 24: 212-221.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Hoppenrath, M., Murray, S.A., Chomérat, N. & Horiguchi, T. (2014). Marine benthic dinoflagellates - unravelling their worldwide biodiversity. Kleine Senckenberg-Reihe Vol. 54. pp. -276. Frankfurt am Main & Stuttgar: V. Mosbrugger & E. Schweizerbartsche Verlagsbuchhandlung.
Description: Benthic, phototrophic, unicellular biflagellate heterodynamic cells of medium size (30-110 µm) with cell wall of cellulosic plates. Plate formula : Po, 3', 7", 6c, 6-8s, 5"',1p, 2"", for O. labens in addition a ventral pore plate and a curved, ridged plate is described in the sulcus. Cells are apical-antapically compressed, ovoid in apical and antapical view but lens-shaped in ventral or dorsal view. The apical pore is a long slit, displaced to the left dorsal side. The cingulum is deeply impressed, the small recessed sulcus is restricted to the hyposome, with one sulcal list. Nucleus of the dinokarotic type, spherical, located posteriorly. Chloroplasts present. One species reported to be mixotrophic, feeding on ciliates or other prey. Species of Ostreopsis are regarded as producing okadaic acid and other toxins causing ciguatera; for a synopsis of literature see Faust et al. (1996). Habitat: Marine coastal regions of tropical and subtropical oceans; two species in the Mediterranean Sea. Living epiphytic or benthic on macroalgae, corals or detritus.
Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 16 Mar 2021 by M.D. Guiry.
Numbers of names and species: There are 12 species names in the database at present, of which 11 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.
Steidinger, K.A. & Tangen, K. (1996). Dinoflagellates. In: Identifying Marine Phytoplankton. (Tomas, C.R. Eds), pp. 387-584. San Diego: Academic Press.
Laza-Martinez, A., Orive, E. & Miguel, I. (2011). Morphological and genetic characterization of benthic dinoflagellates of the genera Coolia, Ostreopsis and Prorocentrum from the south-eastern Bay of Biscay. European Journal of Phycology 46(1): 45-65.
Penna, A., Fraga, S., Nattocchi, C., Casabianca, S., Perini, F., Capellacci, S., Casabianca, A., Riobo, P., Giacobbe, M.G., Totti, C., Accoroni, S., Vila, M., René, A., Scardi, M., Aligizaki, K., Nguyen-Ngoc, L. & Vernesi, C. (2012). Genetic diversity of the genus Ostreopsis Schmidt: phylogeographical considerations and molecular methodology applications for field detection in the Mediterranean Sea. Cryptogamie Algologie 33(2): 153-163.
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: 26 September 2014 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44664
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 18 September 2021.