Marginariella Tandy, 1936
Lectotype species: Marginariella urvilliana (A.Richard) Tandy
Original publication: Tandy, G. (1936). Nomenclature of Marginaria A. Rich. Journal of Botany [London] 74: 209-210.
Request PDFType designated in: De Toni, G.B. (1891). Systematische Übersicht der bisher bekannten Gattungen der echten Fucoideen. Flora 74: 171-182.
Description: Thallus to more than 2 m long with axes bearing long, alternate, flat lateral branches to 6 cm broad, serrate to almost entire. Conical holdfast with interwoven, branched haptera. Growth from an apical meristem consisting of one 4-sided apical cell and surrounding meristematic tissue. Thallus is parenchymatous and differentiated into a meristoderm of small cells with numerous chloroplasts, a cortex of larger, vacuolate cells and a filamentous medulla. Life history is diplontic. Sexual reproduction is oogamous. Individuals are monoecious or dioecious with receptacles compressed or terete to 7 cm long and 4 mm diameter, forming a dense fringe on adaxial margins of laterals. Conceptacles containing antheridia and/or oogonia. Oogonia produce one egg and seven supernumary nuclei. On egg release, the oogonial collar (derived from the mesochite) is transformed into a mucilaginous stalk attaching the egg to the conceptacle.
Information contributed by: M.N. Clayton. The most recent alteration to this page was made on 2014-06-21 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
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: Marginariella is endemic in New Zealand.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=42592
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 June 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 April 2024
