Symbiococcum M.Rahat & V.Reich, 1989: 182
Holotype species: Symbiococcum hydrae M.Rahat
Taxonomic status: currently recognized as a distinct genus.
Description: Cell spherical and single, 7-40 &m in diameter, sometimes forming non-gelatinous coenobia. In nature, endosymbiont in vacuoles of endodermal cells of host hydra. Endosymbiotic cells with thick cell walls, free-living cells with thinner walls. Cells with single nucleus and single cup-shaped parietal chloroplast with one pyrenoid and abundant starch grains. Reproduction only by vegetative cell division (desmoschisis). Sexuality and the formation of flagellated stages unknown. Symbiococcum only known from nature as an endosymbiont in the coelenterate, Hydra magnipapilata collected from Ishikawa Prefecture, Japan. In culture, forming stable symbioses with other species of Hydra from Australia and Africa. In unialgal culture, vigorous cultures can be obtained. Cells can survive several weeks in the dark, however, no visible growth occurs; on return to the light growth resumes.
NCBI Nucleotide Sequences
Numbers of names and species: There is only one species or infraspecific name in the database at present.
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):
Symbiococcum hydrae M.Rahat C - type
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=46307
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 12 December 2013.