Durvillaea Bory de Saint-Vincent, 1826: 192
Holotype species: Durvillaea utilis Bory de Saint-Vincent
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.
Taxonomic status: currently recognized as a distinct genus.
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.
Comments: Durvillaea occurs intertidally and subtidally in cold temperate and subantarctic regions of the southern hemisphere, and commonly forms dense stands.
NCBI Nucleotide Sequences
Numbers of names and species: There are 12 species (and infraspecific) names in the database at present, of which 5 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently 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):
Durvillaea antarctica (Chamisso) Hariot C
Durvillaea caepaestipes (Montagne) Skottsberg S
Durvillaea chathamensis C.H.Hay C
Durvillaea harveyi J.D.Hooker S
Durvillaea mastix Suhr S
Durvillaea montagnei Kützing S
Durvillaea poha C.I.Fraser, H.G.Spencer & J.M.Waters C
Durvillaea porra (Léman) Gaillon S
Durvillaea potatorum (Labillardière) Areschoug C
Durvillaea simplex Suhr C
Durvillaea utilis Bory de Saint-Vincent S - type
Durvillaea willana Lindauer C
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: http://www.algaebase.org/search/genus/detail/?genus_id=42573
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 09 March 2014.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:7633