Ecklonia Hornemann, 1828

Holotype species: Ecklonia buccinalis (Linnaeus) Hornemann

Currently accepted name for the type species: Ecklonia maxima (Osbeck) Papenfuss

Original publication and holotype designation: Hornemann, J.W. (1828). Om Fucus buccinalis Lin. Kongelige Danske Videnskabernes Selskabs Naturvidenskabelige og Mathematiske Afhandlinger 3: 379-390, 1 folded plate.

Description: Sporophyte thallus 1-15 m long with a holdfast of much- branched haptera, each producing a single plant (except in E. stolonifera). Stipes terete, solid or hollow, 2 cm to 12 m long, in E. maxima expanding distally to form a gas-filled float. Single primary blade arising from transition with stipe. Generally elongate secondary blades developing proximally from marginal teeth initiated in the transition region and disintegrating distally along the margins of the primary blade. One species (E. stolonifera) with secondary blades reduced to short dentate projections. Blades smooth, longitudinally rugose (in some species only when juvenile) or spinose, with smooth or dentate margins. Sporophytes of most species incapable of vegetative propagation, but one species (E. stolonifera) with spreading holdfast producing many uprights, and one species (E. brevipes) propagating by attachment of secondary holdfast tissue produced from blades. Anatomy typical of Laminariales; mucilage ducts present or absent. Reproductive sorus formed primarily, but not exclusively, on secondary blades, except in E. stolonifera. Structure of sporophyte sorus and microscopic gametophytes typical of Laminariales. Species taxonomy is in need of revision. A number of species described in specific regions may be variants of E. radiata sensu lato. Very different species are capable of hybridisation.

Information contributed by: J. J. Bolton. The most recent alteration to this page was made on 2024-10-02 by Salvador Valenzuela Miranda.

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: Occurs in many warm temperate regions, dominating extensive kelp beds in Australia, New Zealand, South Africa, and the north western Pacific. Rare in northeast Atlantic, and absent from northeast Pacific and northwest Atlantic. Recorded as extending into tropical conditions in Western Australia and the Gulf of Iran.

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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=35713

Citing AlgaeBase
Cite this record as:
Salvador Valenzuela Miranda in Guiry, M.D. & Guiry, G.M. 02 October 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024