155,837 species and infraspecific names are in the database, 21,968 images, 60,232 bibliographic items, 439,367 distributional records.

Oerstedtia Trevisan, 1848

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

Holotype species: Oerstedtia australis (Endlicher & Diesing) Trevisan

Currently accepted name for the type species: Oerstedtia scalaris (Suhr) Jensen

Original publication and holotype designation: Trevisan, V.B.A. (1848). Saggio di una monografia delle Alghe Coccotalle. pp. 1-112. Padova [Padua]: coi tipi del seminario.
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as feminine.

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.

Description: Plants to 70 cm in length, with a somewhat woody conical holdfast producing a short (to 12 cm) subterete perennial main axis bearing much longer primary laterals (to 5 mm wide) in a bilateral distichous arrangement, which are strongly compressed but not foliaceous. Laterals are without a midrib, entire, linear-elongate, subterete at their base. Vesicles absent. Apical cells 3-sided, positioned at the base of a narrow, slit-like apical pit. Most of the secondary laterals become determinate fertile axes, to 3 cm in length, subtended by a leaf. Receptacular clusters produced laterally and distichously on fertile axes, made up of a number of terete branched axes (1-2 mm long) bearing swollen receptacles terminally (to 1 mm diameter x 1.5 mm long). Plants monoecious, bearing unisexual conceptacles. On a single receptacle the terminal few conceptacles are male, with numerous branched antheridial filaments, and the others female; one egg per oogonium. Single species O. scalaris endemic to Agulhas marine province on the south coast of South Africa, subtidal.

Information contributed by: J. J. Bolton. The most recent alteration to this page was made on 21 Jun 2014 by M.D. Guiry.

Numbers of names and species: There are 2 species names in the database at present, of which 1 has 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.

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: 21 June 2014 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42965

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 July 2019.

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