Zonaria C., 1817, nom. cons.
Holotype species: Zonaria flava C.Agardh
Currently accepted name for the type species: Zonaria tournefortii (J.V.Lamouroux) Montagne
Original publication and holotype designation: Agardh, C.A. (1817). Synopsis algarum Scandinaviae, adjecta dispositione universali algarum. pp. [i]-xl, -135. Lundae [Lund]: Ex officina Berlingiana.
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 recumbent, arising from a matted rhizoidal holdfast, up to 25 cm long, flabellate or much branched, with stupose lower branches, complanate to spirally twisted upper branches, 0.1-6 cm broad. Growth initiated by a marginal row of many apical cells. Thallus 4-10 cells thick, in transverse section cells arranged in tiers with 2 cortical cells overlying each medullary cell. Cortical cells with many chloroplasts. Hair tufts scattered or in concentric zones. Sporangial sori scattered on both thallus surfaces of the upper branches, with (or in Z. angustata without) numerous whitish multicellular hairs. Sporangia clavate to ovoid, external to the thallus, 90-180 mm high and 70-115 mm across, without a stalk cell, producing 8 spores. Gametophytes dioecious. Oogonial sori ovate to irregularly concentric, scattered on both thallus surfaces on upper branches. Oogonia clavate to elongate ovoid, with one stalk cell. Antheridial sori whitish, large, ovate to irregularly concentric, 1-2 mm long and 0.2-1 mm across, scattered on both thallus surfaces on the upper branches, bordered by slightly elongate sterile cells. Each antheridium with many tiers of locules and one stalk cell. Genus distributed in temperate waters of Atlantic Europe, Mediterranean Sea, South Africa, Australia, New Zealand, Japan and California.
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.
Numbers of names and species: There are 105 species names in the database at present, as well as 21 infraspecific names. Of the species names, 18 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.
Ribero Siguan, M.A., Gomez Garreta, A., Salvador Soler, N. Rull Lluch, J. & Kapraun, D.F. (2011). Nuclear content estimates suggest a synapomorphy between Dictyota and six genera of the Dictyotales (Phaeophyceae). Cryptogamie Algologie 32(2): 205-219.
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: 29 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=33382
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 20 September 2020.