152,930 species and infraspecific names are in the database, 20,947 images, 59,150 bibliographic items, 408,271 distributional records.

Durvillaea Bory, 1826

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Phaeophyceae
Subclass Fucophycidae
Order Fucales
Family Durvillaeaceae

Holotype species: Durvillaea utilis Bory

Currently accepted name for the type species: Durvillaea antarctica (Chamisso) Hariot

Original publication and holotype designation: Bory de Saint-Vincent, J.B.G.M. (1826). Laminaire, Laminaria. In: Dictionnaire Classique d'Histoire Naturelle. (Audouin, I. et al. Eds) Vol. 9, pp. 187-194.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Silberfeld, T., Rousseau, F. & Reviers, B. de (2014). An updated classification of brown algae (Ochrophyta, Phaeophyceae). Cryptogamie Algologie 35(2): 117-156.

Nomenclatural notes
Several authors, including De la Pylaie (1829: 23) introduced the orthography "Durvillea" but the original spelling was "Durvillaea" and the change was unnecessary. - (18 Mar 2017) - M.D. Guiry

Description: Massive thallus to 10 m long with a large discoid holdfast, a robust stipe and leathery fronds divided from near the base or from above into stipitate, ligulate or broad blades. Growth is diffuse in the upper part of the blades and in the meristoderm. Thallus structure is essentially haplostichous and differentiated into a meristoderm with relatively small cells arranged in radiating files and containing numerous physodes and chloroplasts, grading into a cortex of larger vacuolate cells and medulla of intertwined hyphal filaments with or without air chambers. Extensive deposits of intercellular wall material are present. Discoid chloroplasts lack pyrenoids. Life history is diplontic. Sexual reproduction is oogamous. Individuals are dioecious with conceptacles containing antheridia or oogonia scattered all over the blades. Antheridia develop on branched paraphyses. Spermatozoids are colorless, lack an eyespot and are not phototactic. Oogonia develop on the conceptacle wall or branched paraphyses, and produce 4 eggs each approx. 30 µm in diameter and in Durvillaea potatorum having a second vestigial nucleus in addition to the egg nucleus. Eggs secrete the sperm attractant, hormosirene.

Information contributed by: M. N. Clayton. The most recent alteration to this page was made on 18 Mar 2017 by M.D. Guiry.

Comments: Durvillaea occurs intertidally and subtidally in cold temperate and subantarctic regions of the southern hemisphere, and commonly forms dense stands.

Numbers of names and species: There are 13 species names in the database at present, of which 7 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
Bachelot de la Pylaie, A.J.M. (1830 '1829'). Flora de l'Ile Terre-Neuve et des Iles Saint Pierre et Miclon. Livraison [Algae]. pp. 1-128. Paris: Typographie de A. Firmin Didot, rue Jacob, No. 24.

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: 28 December 2000 by M.D. Guiry

Verified by: 18 March 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42573

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 24 September 2018.

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