Trigonidiella P.C., 1970: 945
Holotype species: Trigonidiella galea (Pascher) P.C.Silva
Original publication and holotype designation:Silva, P.C. (1970). Remarks on algal nomenclature IV. Taxon 19: 941-945.
Taxonomic status: currently recognized as a distinct genus.
Substitute name for Trigonidium Pascher 1932, non Lindley 1837 (Orchidaceae). - (2 Jan 2011) - M.D. Guiry
Description: Cells solitary, tetrahedral to polyhedral with an outer, integument-like cell wall (?mucilage envelope) bearing ridge-like projections upon the margins. In median optical section the cells are asymmetrically pyramidal, one side being slightly longer than the others with the protoplast distantly removed from the cell wall. Cells usually 15-18 &m in diameter, seldom larger. Chloroplast single, parietal, with one pyrenoid. Asexual reproduction by partitioning of parental protoplast into 4 tetrahedrally disposed daughter cell protoplasts each of which has a very large bowl-shaped chloroplast, 2 contractile vacuoles and usually a distinct stigma. Shortly after partitioning, a distinct mucilage envelope forms around each daughter cell protoplast. Mature daughter cells, each with the characteristically ridged outer integument, are released upon rupture of the mother cell wall. Sexual reproduction and flagellated stages unknown. Trigonidiella, known only from the type locality, a boggy marsh of very low pH in Czechoslovakia.
NCBI Nucleotide Sequences
Numbers of names and species: There is only one species or infraspecific name in the database at present, which has 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):
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=47432
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 24 May 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:5421