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, 17 plates. Bern: Jent & Reinert.

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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 2021-03-18 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Kostygov, A.Y., Karnkowska, A., Votýpka, J., Tashyreva, D., Maciszewski, K., Yurchenko, V. & Lukeš, J. (2021). Euglenozoa: taxonomy, diversity and ecology, symbioses and viruses. Open Biology 11(200407): 1-47.

Comments: Throndsen (1997: 647) record this genus as being a member of the Order Euglenales.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=43652

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 18 March 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024