Gayralia K.L., 1969: 1351, 1354
Holotype species: Ulva oxysperma Kützing
Currently accepted name for the type species: Gayralia oxysperma (Kützing) K.L.Vinogradova ex Scagel et al.
Original publication and holotype designation:Vinogradova, K.L. (1969). K. sistematike poryadka Ulvales (Chlorophyta) s.l.. Botanicheskij Zhurnal SSSR 54: 1347-1355, Scheme.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Description: Thalli forming leafy monostromatic blades from a few cm to a meter or more in length. Cells in upper portion of blade polygonal and isodiametric, becoming more elongate towards base with long rhizoidal projections in holdfast region. In surface view, cells in groups of two or four. Cells uninucleate with parietal chloroplast and single prominent pyrenoid traversed by thylakoids. Asexual reproduction by means of biflagellate swarmers (rarely quadriflagellate) formed in sporangia differentiated from vegetative cells. Spore release by disintegration of wall on one side of thallus to expose sporangial mass which releases through an apical pore in each sporangium. Swarmers 8-10 µm long with prominent eyespots and negative phototaxis. Spores germinate to form uniseriate filament which becomes saccate and then opens into a blade-like thallus. Sexual reproduction unknown.
Comments: Gayralia is widely distributed from arctic to tropics in marine to brackish habitats. In axenic culture, plants develop abnormally, comprising a colony of round cells with numerous rhizoids; normal morphology returns after bacteria are reintroduced.
NCBI Nucleotide Sequences
Numbers of names and species: There are 3 species (and infraspecific) names in the database at present, of which 2 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):
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42532
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 19 May 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:7667