Eutreptia Perty, 1852
Holotype species: Eutreptia viridis Perty
Original publication and holotype designation: Perty, M. (1852). Zur Kenntniss kleinster Lebensformen: nach Bau, Funktionen, Systematik, mit Specialverzeichniss der in der Schweiz beobachteten. pp. 1-228, pls I-XVII. Bern: Verlag von Jent & Reinert.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Cavalier-Smith, T. (2016). Higher classification and phylogeny of Euglenozoa. European Journal of Protistology 56: 250–276, 2 figs.
Description: Green, free-swimming, spindle-shaped, unflattened cells, with pronounced euglenoid movement; numerous discoid or ribbon-shaped chloroplasts, often radiating from a central paramylon center (pyrenoid surrounded by sheath of paramylon grains); eyespot present, with a flagellar swelling on one flagellum. Two emergent flagella, equal in length or nearly so, heterodynamic, both highly mobile during swimming. Cells fairly large, the type up to 80 _ 15 _m. Copious mucilage often produced to give flocculent masses of the characteristic palmelloid state in which cells may divide repeatedly; nucleus large, with 44-45 chromosomes in the type, 90 in E. pertyi Pringsheim. Quite common in brackish and marine eutrophic waters; recorded from coastal and estuarine regions of the Atlantic and Adriatic Oceans, the North Sea, Russia, China and Scandinavia.
Information contributed by: G.F. Leedale. The most recent alteration to this page was made on 30 Dec 2017 by M.D. Guiry.
Comments: Throndsen (1997: 647) record this genus as being a member of the Order Euglenales.
Numbers of names and species: There are 9 species names in the database at present, as well as 1 infraspecific names. Of the species names, 9 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.
Throndsen, J. (1996). The planktonic marine flagellates. In: Identifying marine phytoplankton. (Tomas, C.R. Eds), pp. 591-730. San Diego: Academic Press.
Chrétiennot-Dinet, M.-J. (1990). Atlas du phytoplancton marin. Volume III: Chlorarachnophycées, Chlorophycées, Chrysophycées, Cryptophycées, Euglénophycées, Eustigmatophycées, Prasinophycées, Prymnesiophycées, Rhodophycées et Tribophycées Avec la collaboration de Chantal Billard et Alain Sournia. pp. -261. Paris: Éditions du Centre National de la Recherche Scientifique 15, quai Anatole France - 75700 Paris.
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: 11 April 2002 by M.D. Guiry
Verified by: 30 December 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43652
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 28 November 2020.