Symbiococcum M.Rahat & V.Reich, 1989

Holotype species: Symbiococcum hydrae M.Rahat

Original publication and holotype designation: Rahat, M. & Reich, V. (1989). Symbiococcum hydrae gen. et sp. nov. (Chlorosarcinales, Chlorophyta): an endosymbiotic green alga from cells of the Japanese Hydra magnipapillata (Coelenterata). Phycologia 28: 181-187.

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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.

Information contributed by: D. Garbary. The most recent alteration to this page was made on 2018-06-06 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 June 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024