163,924 species and infraspecific names are in the database, 22,783 images, 63,106 bibliographic items, 484,278 distributional records.

Antarcticothamnion R.L.Moe & P.C.Silva, 1979

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Wrangeliaceae
Subfamily Compsothamnioideae
Tribe Compsothamnieae

Holotype species: Antarcticothamnion polysporum R.L.Moe & P.C.Silva

Original publication and holotype designation: Moe, R.L. & Silva, P.C. (1979). Morphological and taxonomic studies on Antarctic Ceramiaceae (Rhodophyceae). I. Antarcticothamnion polysporum gen. et sp. nov.. British Phycological Journal 14: 385-405.
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Precise date of publication3 Dec 1979

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Description: Thallus to 6 cm, with monosiphonous, erect axes. Apical cells divide by oblique septa to produce alternate-distichous determinate branchlets, curved at first, becoming reflexed when mature. Indeterminate branches at intervals in whorls consisting of 1 determinate branchlet and 1-3 indeterminate branches. Axes corticated below with decurrent branched rhizoids. Cells-multinucleate. Procarps 2-4 cells below branch apices, 2 uninucleate pericentral cells at right angles to one another with sterile cell and carpogonial branch on first formed pericentral cell (= supporting cell). Each pericentral cell cuts off an auxiliary cell and either or both fuse with a connecting cell from the carpogonium and form carposporophyte surrounded by involucral branches from the axial cell below. Spermatangia in loose heads. Sporangia polyhedrally divided.

Information contributed by: E.M. Wollaston & M.D. Guiry. The most recent alteration to this page was made on 5 Oct 2010 by M.D. Guiry.

Comments: Recorded only from South Shetland Islands and Antarctic Peninsula usually growing on a bryozoan epiphytic on Phyllophora ahnfeltioides Kylin and Myriogramme manginii Gain in clear offshore water, 13-16 m deep, October to January. All plants epiphytized by diatoms and the green alga Entocladia. Transfer of Antarcticothamnion to tribe Compsothamnieae has been proposed.

Numbers of names and species: There is only one species or infraspecific name in the database at present, which has 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.

References
Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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.

Created: 31 December 2000 by M.D. Guiry

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Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42834

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

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