Cladosiphon Kützing, 1843

Holotype species: Cladosiphon mediterraneus Kützing

Original publication and holotype designation: Kützing, F.T. (1843). Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange. Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.

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Description: Thallus erect, filiform, 10-20 cm high, branched, gelatinous, attached to the substratum, which is usually seagrass, with a minute discoid holdfast. Medulla multiaxial, of elongated unpigmented sympodially branched filaments. Subcortex formed by few-celled, radially extending laterals. Cortex consisting of simple assimilatory filaments 20-40 cells long with basally rectangular, terminally ovoid cells and of phaeophycean hairs. Plurilocular sporangia transformed laterally from upper cells of assimilatory filaments. Unilocular sporangia formed at the base of assimilatory cells. Life history best studied in the economically important Cladosiphon okamuranus (Japanese name: Mozuku). Alternation of heteromorphic generations. Erect thalli are sporophytes that may reproduce directly via spores from plurilocular sporangia. Spores from unilocular sporangia develop into microscopic discoid gametophytes that form isogametes in erect uniseriate gametangia. Chromosome number in C. okamuranus is n=8, 2n=16. In Cladosiphon, germination of zoids is stellate as an adaptation to epiphytic growth.

Information contributed by: A. F. Peters. The most recent alteration to this page was made on 2014-06-20 by M.D. Guiry.

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

Gender: This genus name is currently treated as masculine.

Most recent taxonomic treatment adopted: Silberfeld, T., Rousseau, F. & Reviers, B. de (2014). An updated classification of brown algae (Ochrophyta, Phaeophyceae). Cryptogamie Algologie 35(2): 117-156, 1 fig., 1 table.

Comments: Widely distributed in temperate to tropical seas.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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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Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 20 June 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 19 July 2024

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