Gymnothamnion J., 1892: 27
Holotype species: Gymnothamnion elegans (Schousboe ex C.Agardh) J.Agardh
Original publication and holotype designation:Agardh, J.G. (1892). Analecta algologica. Acta Universitatis Lundensis 28(6): 1-182, 3 pls.
Taxonomic status: currently recognized as a distinct genus.
Description: Thallus prostrate and erect, branching opposite-distichous with irregular short and long branchlets, axes ecorticate, apical cell transversely divided. Cells uninucleate. Procarps subterminal on lateral branches, carpogonial branch 4-celled. Auxiliary cell, cut off from supporting cell leading to carposporophyte with irregularly elongate groups of carposporangia. Involucre lacking. Spermatangia in corymbose heads. Tetrasporangia single, terminal on branchlets, tetrahedrally divided.
Comments: Relationships uncertain, affinities with Ptiloteae and Antithamnieae noted (vide Kajimura 1989). Not common, but widespread including Mediterranean, Atlantic ocean, Japan, usually in warm seas often on rock and corals protected from exposure.
NCBI Nucleotide Sequences
Numbers of names and species: There are 5 species (and infraspecific) names in the database at present, of which 3 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently 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):
Gymnothamnion bipinnatum F.S.Collins & Hervey S
Gymnothamnion elegans (Schousboe ex C.Agardh) J.Agardh C - type
Gymnothamnion elegans var. bisporum Stegenga C
Gymnothamnion nigrescens (J.Agardh) Athanasiadis C
Gymnothamnion pteroton (Schousboe ex Bornet) Athanasiadis C
Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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: http://www.algaebase.org/search/genus/detail/?genus_id=33299
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 10 March 2014.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:8766