Taonia J.Agardh, 1848

Holotype species: Taonia atomaria (Woodward) J.Agardh

Original publication and holotype designation: Agardh, J.G. (1848). Anadema, ett nytt slägte bland Algerne. Öfversigt af Kongl. Vetenskaps-Akademiens Förhandlingar, Stockholm 1846: 1-16, pl. XVII.

Description: Thalli erect, attached by matted, branched rhizoids, up to 30 cm long, complanate, flabellate or lacerate with many elongate, cuneate branches, 0.5-6 cm broad, often tapering to the apex. Growth initiated from a marginal row of apical cells. Thallus 2 cells thick near apex increasing to 5-7 cells thick towards the thallus base, not arranged in rows in transverse section. Hairs in concentric lines across the thallus. Sporangia solitary, in irregularly scattered groups or in short concentric zones adjacent to the hair lines, partially embedded in or completely external to the frond, without a stalk cell or with 1-3 stalk cells, 80-140 mm high when mature, producing 4 spores. Gametophytes dioecious. Antheridial sori whitish, irregularly shaped, scattered over both thallus surfaces, 100-800 mm across, bounded by 1-2 layers of sterile cells. Antheridia with 15-20 tiers of locules, with one stalk cell. Oogonial plants unknown. Disjunct geographical distribution with one species in south-eastern Australia and New Zealand, one in California and one in Europe (Britain, Atlantic coast of France and Spain, Canary Islands and the Mediterranean Sea) and Morocco.

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.

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, 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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=53

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 23 November 2024