Holotype species: Distromium skottsbergii Levring
Original publication and holotype designation: Levring, T. (1940). Die Phaeophyceengattungen Clanidophora, Distromium und Syringoderma. Kungliga Fysiografiska Sällskapets i Lund Förhandlingar 10(20): 217-227, 5 figs.
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.
Description: Thalli erect or decumbent from a rhizoidal holdfast, up to 8 cm long, flabellate, entire or lacerate, 0.2-1.2 cm across at the apices, or multifid with narrow (up to 1.5 mm broad) branches from the base. Growth initiated by a row of many apical cells. Thallus becoming 2 cells thick immediately below the apical cells and remaining 2 cells thick throughout. Cells with numerous discoid chloroplasts. Hairs present or absent, in concentric zones or scattered tufts. Sporangia in concentric or scattered indusiate sori on the upper thallus surface, ovoid to pryiform, 150-250 mm in diameter, with or without a basal stalk cell, dividing to form 4 spores. Antheridial sori (known only from male plants of D. multifidum) on terminal segments, 400-600 mm long by 200-300 mm across. Oogonia unknown.
Information contributed by: J. A. Phillips and R. J. King. The most recent alteration to this page was made on 20 Jun 2014 by M.D. Guiry.
Comments: Japan, southern and south eastern Australia, New Zealand, South America (Juan Fernandez Is.).
Numbers of names and species: There are 6 species names in the database at present, of which 6 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.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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: 20 June 2014 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=41297
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 27 February 2020.