Zonaria C.Agardh, 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, [1]-135. Lundae [Lund]: Ex officina Berlingiana.

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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 2014-06-20 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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, 1 fig., 1 table.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=33382

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 20 June 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024