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Ahnfeltia plicata (Hudson) E.M.Fries 1836

Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Ahnfeltiophycidae
Order Ahnfeltiales
Family Ahnfeltiaceae
Genus Ahnfeltia


click on thumbnail for larger version.

Ahnfeltia plicata (Hudson) E.M.Fries
cross-section, Atlantic France, 201. Ignacio Bárbara. © Ignacio Bárbara (barbara@udc.es).

Ahnfeltia plicata (Hudson) E.M.Fries
cross-section, Atlantic France, 201. Ignacio Bárbara. © Ignacio Bárbara (barbara@udc.es).

Ahnfeltia plicata (Hudson) E.M.Fries
habit, Ría de A Coruña, Galicia, Spain, 2013. Ignacio Bárbara. © Ignacio Bárbara (barbara@udc.es).

Ahnfeltia plicata (Hudson) E.M.Fries
cross-section, Atlantic France, 201. Ignacio Bárbara. © Ignacio Bárbara (barbara@udc.es).

Ahnfeltia plicata (Hudson) E.M.Fries
Spiddal, Co. Galway, Ireland; showing carposporangial swellings. 29 Mar 2012. M.D. Guiry. © M.D. Guiry (mikeguiry@me.com).

Ahnfeltia plicata (Hudson) E.M.Fries
Spiddal, Co. Galway, Ireland; to about 30 cm . 29 Mar 2012. M.D. Guiry. © M.D. Guiry (mikeguiry@me.com).

Ahnfeltia plicata (Hudson) E.M.Fries
Spiddal, Co. Galway, Ireland; to about 15 cm . 29 Mar 2012. M.D. Guiry. © M.D. Guiry (mikeguiry@me.com).

Ahnfeltia plicata (Hudson) E.M.Fries
Collected near Roscoff (F), Dec 1984. 29 Dec 2011. Elmar Wosnitza. © Christine Wosnitza.

Ahnfeltia plicata (Hudson) E.M.Fries
lower intertidal, Ría de Muros, Galicia, Spain, 2011. 24 Oct 2011. Ignacio Bárbara. © Ignacio Bárbara (barbara@udc.es).

Ahnfeltia plicata (Hudson) E.M.Fries
Northern California. 09 Mar 2011. Wendell Wood (ww@oregonwild.org). © Wendell Wood (ww@oregonwild.org).

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14 Found - Displaying 1 through 10


Lithothamnion onkodes Heydrich

Ahnfeltia plicata (Hudson) E.M.Fries lower intertidal, Ría de Muros, Galicia, Spain, 2011
© Ignacio Bárbara (barbara@udc.es)

Publication details
Ahnfeltia plicata (Hudson) E.M.Fries 1836: 310

Published in: Fries, E.M. (1836). Corpus florarum provincialium Sueciae. I. Floram scanicam. pp. 193-346. Upsaliae [Uppsala]: excudebant Regiae Acad. Typographi.
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Type species
This is the type species (lectotype) of the genus Ahnfeltia.

Status of name
This name is of an entity that is currently accepted taxonomically.

Fucus plicatus Hudson

Type information
Type locality: Habitat in littoribus marinis [Dwells on marine shores, England] (Hudson 1762: 470). Lectotype: BM (Dixon & Irvine 1977: 213). Notes: Lectotype: BM. An unlocalized, undated Hudson specimen accepted as of provisional lectotype status. England.

Origin of species name
Adjective (Latin), folded into pleats or furrows, usually longitudinally (Stearn 1973).

Homotypic Synonym(s)
Gigartina plicata (Hudson) J.V.Lamouroux
Gymnogongrus plicatus (Hudson) Kützing
Ceramium plicatum (Hudson) Roth
Fucus plicatus Hudson 1762
Fucus albus Hudson 1762
Flagellaria plicata (Hudson) Stackhouse 1809
Fucus plicatus var. simplicior C.Agardh 1810
Sphaerococcus plicatus (Hudson) C.Agardh 1817
Sphaerococcus plicatus var. tenuis C.Agardh 1817
Sphaerococcus plicatus var. simplicior (C.Agardh) C.Agardh 1817
Sphaerococcus plicatus var. elongatus (Turner) C.Agardh 1817
Gigartina plicata var. tenuior Lyngbye 1819
Gigartina plicata var. simplicior Lyngbye 1819
Gigartina confervoides var. plicata (Esper) Lyngbye 1819
Tylocarpus plicatus (Hudson) Kützing 1843

Heterotypic Synonym(s)
Fucus plicatus Esper 1798
Gymnogongrus comosus Kützing 1869
Sterrocolax decipiens F.Schmitz 1893
Porphyrodiscus simulans Batters 1897
Ahnfeltia plicata f. pumila Lakowitz 1907
Ahnfeltia plicata f. tenuior (Lyngbye) Rosenvinge 1931
Ahnfeltia plicata f. tenuis (C.Agardh) Levring 1940

Nomenclatural notes
Pp. 193-346 of Corpus florarum provincialium Sueciae. I. Floram scanicam were published in 1936 (TL-2, Vol. 1: 883), not 1835 as in many monographs. - (3 Feb 2017) - M.D. Guiry

Taxonomic notes
For more information Guiry (1997) recommends consulting Maggs, McLachlan & Saunders (1989).

Habitat notes
From low to mid (rarely upper) intertidal pools or in the exposed low intertidal to subtidal depths of 8 m, growing attached to rocks, crustose corallines or mussels, commonly associated with sandy habitats, or in drift (Milstein & Saunders 2012). - (22 Jun 2012) - Wendy Guiry

General environment
This is a marine species.

Common names

(as Ahnfeltia plicata (Hudson) E.M.Fries)
English: Bushy Ahnfelt's Seaweed (Arasaki & Arasaki 1983), Black Scour Weed (Bunker & al. 2010).

French: Fil de fer (Dickinson 1963).

Japanese: Itanigusa (Arasaki & Arasaki 1983), Kanten (McConnaughey 1985).

Swedish: Havsris (Tolstoy & Österlund 2003).

Common names used in commerce, often for edible algae
fil de fer {Fr}; landladys wig {Eng}; "wig, landladys"

Gametophytes horny, cylindrical, blackish fronds, narrow (1 mm diam.), irregularly subdichotomously branched, to 120 mm high, from a thin crustose base of up to 200 mm diam. Branches with rounded axils and blunt, often bleached tips and growing through shell fragments. Tetrasporophyte (Porphyrodiscus-phase) a thin violet crust , generally found in association with the gametophytes.

On rock, mid-intertidal to sublittoral, especially common on sand-covered rocks, widely distributed, common.

Detailed distribution with sources (Click to Load)

Key references
Athanasiadis, A. (2016). Phycologia Europaea Rhodophyta Vol. I. pp. [i]-xxxxviii, 1-762. Thessaloniki: Published and distributed by the author.

Braune, W. (2008). Meeresalgen. Ein Farbbildführer zu den verbreiteten benthischen Grün- Braun- und Rotalgen der Weltmeere. pp. [1]-596, pls 1-266 (colour photographs). Ruggell: A.R.G. Gantner Verlag.

Dawson, E.Y. (1961). Marine red algae of Pacific Mexico. Part 4. Gigartinales. Pacific Naturalist 2: 191-343, 63 plates.

Dawson, E.Y., Acleto, C. & Foldvik, N. (1964). The seaweeds of Peru. Beihefte zur Nova Hedwigia 13: 1-111, 81 pls.

Kjellman, F.R. (1889). Om Beringhafvets algflora [About the Bering Sea algae]. Kongl. Svenska Vetenskaps-Akademiens Handlingar 23(8): 1-58, pls I-VII.

Loiseaux-de Goër, S. & Noailles, M.-C. (2008). Algues de Roscoff. pp. [1]-215, col. figs. Roscoff: Editions de la Station Biologique de Roscoff.

Maggs, C.A., McLachlan, J.L. & Saunders, G.W. (1989). Infrageneric taxonomy of Ahnfeltia (Ahnfeltiales, Rhodophyta). Journal of Phycology 25(2): 351-368.

Mathieson, A.C. & Dawes, C.J. (2017). Seaweeds of the Northwest Atlantic. pp. [i]-x, 1-798, 109 pls. Amherst & Boston: University of Massachusetts Press.

Mikami, H. (1965). A systematic study of the Phyllophoraceae and Gigartinaceae from Japan and its vicinity. Memoirs of the Faculty of Fisheries Hokkaido University 5(2): 181-285.

Milstein, D. & Saunders, G.W. (2012). DNA barcoding of Canadian Ahnfeltiales (Rhodophyta) reveals a new species - Ahnfeltia borealis sp. nov.. Phycologia 51(3): 247-259.

Nielsen, R. & Lundsteen, S. (2019). Danmarks havalger Bind 1 Rødalger (Rhodophyta). Scientia Danica. Series B, Biologica 7: [1]-398, col. figs and distributional maps.

Pedersen, P.M. (2011). Grønlands havalger. pp. [1] 7-208. Copenhagen: Forlaget Epsilon.DK.

Smith, G.M. (1944). Marine algae of the Monterey Peninsula. pp. i-ix, 1-622, 98 pls. Stanford: Stanford University Press.

Zemke-White, W.L. & Ohno, M. (1999). World seaweed utilisation: an end-of-century summary. Journal of Applied Phycology 11: 369-376.

Zinova, A.D. (1955). Opredelitel' burykh vodorosley severnykh morey SSSR [Manual for identification of the brown algae of the northern seas of the USSR]. Vol. 2 pp. 220, 169 figures. Moscow & Leningrad: Izdatel'stvo Akademii Nauk SSSR. [in Russian]

Created: 30 March 1996 by M.D. Guiry

Verified by: 07 August 2020 by M.D. Guiry

Accesses: This record has been accessed by users 13541 times since it was created.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Chen, L.C.-M. (1977). The sporophyte of Ahnfeltia plicata (Huds.) Fries (Rhodophyceae, Gigartinales) in culture. Phycologia 16: 163-168.
Farnham, W.F. & Fletcher, R.L. (1973). Sur la présence a Roscoff du Porphyrodiscus simulans Batters, et sa relation avec l'Ahnfeltia plicata (Huds.) Fries.. Travaux Station Biologique de Roscoff, Nouvelle Série 20: 9.
Farnham, W.F. & Fletcher, R.L. (1976). The occurrence of a Porphyrodiscus simulans Batt. phase in the life history of Ahnfeltia plicata (Huds.) Fries. British Phycological Journal 11: 183-190.
Gregory, B.D. (1934). On the life history of Gymnogongrus griffithsiae Mart. and Ahnfeltia plicata Fries.. Journal of the Linnean Society of London, Botany 49: 531-551.
Haglund, K., Axelsson, L. & Pedersén, M. (1987). Photosynthesis and respiration in the alga Ahnfeltia plicata in a flow-through system. Marine Biology, Berlin 96: 409-412.
Kanno, R. & Matsubara, S. (1932). [Studies on Ahnfeltia plicata var. tobuchiensis var. nov.]. Suisangaku Zasshi 35: 97-132, 2 pl. [in Japanese]. [in Japanese]
Maggs, C.A. & Pueschel, C.M. (1989). Morphology and development of Ahnfeltia plicata (Rhodophyta): proposal of Ahnfeltiales ord. nov.. Journal of Phycology 25(2): 333-351, 95 figs.
Rosenvinge, L.K. (1931). The reproduction of Ahnfeltia plicata. Det kgl. dan. Vidensk. Skr., Naturv. og Mathem. Afd. 10: 1-29.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 24 October 2021.

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