162,398 species and infraspecific names are in the database, 22,760 images, 63,992 bibliographic items, 474,947 distributional records.

Padina Adanson, 1763, nom. cons.

Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Phaeophyceae
Subclass Dictyotophycidae
Order Dictyotales
Family Dictyotaceae
Tribe Zonarieae

Holotype species: Padina pavonica (Linnaeus) Thivy

Original publication and holotype designation: Adanson, M. (1763). Familles des plantes. II. Partie [Vol. 2]. pp. [1-24], [i-iii], [1]-640. Paris: Chez Vincent, Imprimeur-Librarie de Mgr le Comte de Provence, rue S. Servin.
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Taxonomic status: currently recognized as a distinct genus.

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.

Description: Thalli erect or prostrate, attached by a rhizoidal holdfast, up to 20 cm long, complanate, flabellate or becoming lacerate often to the base, segments 1-5cm broad, calcified on one or both surfaces. Growth initiated by an entire marginal row of apical cells in an involute apical fold, directed towards the upper (=inner) thallus surface. Thallus 2-8 cells thick. Whitish hairs in concentric lines on one of both thallus surfaces. Outermost layer of cortical cells with many discoid chloroplasts. Sporangial sori forming concentric rows or isolated patches between the hair lines on one or both thallus surfaces, indusium present or absent. Sporangia ovoid to pyriform, 80-170 mm high when mature, producing 4 spores. Gametophytes usually dioecious, or monoecious in some species. Oogonial sori in concentric rows. Oogonia arranged in rows in sorus. Antheridial sori whitish, in concentric rows or in isolated patches, partially embedded in the thallus, with many tiers of locules. Padina species are delimited by the number of cell layers, the arrangement of sporangial sori in relation to concentric hair bands, presence/absence of hair bands on the lower thallus surface and the presence/absence of an indusium over sporangial sori. Critical re-evaluation may reduce the number of species recognized. Widely distributed in tropical to temperate seas.

Information contributed by: J. A. Phillips and R. J. King. The most recent alteration to this page was made on 19 Oct 2015 by M.D. Guiry.

Numbers of names and species: There are 76 species names in the database at present, as well as 6 infraspecific names. Of the species names, 53 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.

Ni-Ni-Win, Hanyuda, T., Arai, S., Uchimura, M., Prathep, A., Draisma, S.G.A., Phang, S.M., Abbott, I.A., Millar, A.J.K. & Kawai, H. (2011). A taxonomic study of the genus Padina (Dictyotales, Phaeophyceae) including the description of four new species from Japan, Hawaii, and the Andaman Sea. Journal of Phycology 47(5): 1193-1209.

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: 19 October 2015 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=52

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 27 July 2021.

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