Oerstedtia, 1848: 108
Holotype species: Oerstedtia australis (Endlichter & 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.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
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.
NCBI Nucleotide Sequences
Numbers of names and species: There are 2 species (and infraspecific) names in the database at present, of which 1 has 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):
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42965
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 07 December 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:7327