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Laurencia obtusa (Hudson) J.V.Lamouroux 1813

Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Rhodomelaceae
Tribe Laurencieae
Genus Laurencia


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Laurencia obtusa (Hudson) J.V.Lamouroux
 Tarifa, Cádiz, Spain . 17 Mar 2021.  M. Altamirano. © Maria Altamirano Jeschke .

Laurencia obtusa (Hudson) J.V.Lamouroux
Selce, northern Croatia. 26 Mar 2011. Mat Vestjens & Anne Frijsinger. © Mat Vestjens & Anne Frijsinger (annenmat@natuurlijkmooi.net).

Laurencia obtusa (Hudson) J.V.Lamouroux
Madeira. Peter Wirtz. © Peter Wirtz (peterwirtz2004@yahoo.com ).


Surirella biseriata f. punctata Meister

Laurencia obtusa (Hudson) J.V.Lamouroux  Tarifa, Cádiz, Spain 
© Maria Altamirano Jeschke

Publication details
Laurencia obtusa (Hudson) J.V.Lamouroux 1813: 130

Published in: Lamouroux, J.V.F. (1813). Essai sur les genres de la famille des Thalassiophytes non articulées. Annales du Muséum d'Histoire Naturelle, Paris 20: 21-47, 115-139, 267-293, pls 7-13.
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Type species
This is the type species (lectotype) of the genus Laurencia.

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

Fucus obtusus Hudson

Type information
Type locality: Southern England (Hastings, Sussex; Devon (Lipkin & Silva 2002: 38). Lectotype: BM-K, ex Herb. Hudson (Maggs & Hommersand 1993: 398). Notes: Undated, unlocalized Maggs & Hommersand (1993:308).

Origin of species name
Adjective (Latin), obtuse, blunt (Stearn 1985).

Homotypic Synonym(s)
Fucus obtusus Hudson 1778
Chondria obtusa (Hudson) C.Agardh 1817
Sphaerococcus obtusus (Hudson) Wahlenberg 1826

Taxonomic notes
John et al. (2004) cite Chondriopsis subtilis (Kütz) J. Agardh as a synonym of this species.

According to Fujii et al. (2006: 439), the species referred to as Laurencia obtusa in the western Atlantic is distinct from eastern Atlantic L. obtusa. - (14 Sep 2006) - Wendy Guiry

Phylogenetic analyses revealed that the taxa previously identified and cited in Brazil as Laurencia filiformis, L. majuscula and L. obtusa and in the Canary Islands as L. majuscula all represent the same taxonomic entity, i.e., L. dendroidea (Cassano et al. 2012). - (30 Mar 2012) - Wendy Guiry

Habitat notes
Widespread in warm and temperate waters (Lipkin & Silva 2002). Epiphytic, very rarely on dead shells, typically forming dense stands in extensive shallow mid-shore pools and occasionally near extreme low water on fairly sheltered to fairly exposed shores; rarely subtidal to 6 m depth at extremely sheltered sites (Maggs & Hommersand 1993). - (10 Jun 2010) - Wendy Guiry

General environment
This is a marine species.

Common names

(as Laurencia obtusa (Hudson) J.V.Lamouroux)
English: Rounded Brittle Fern Weed (Bunker & al. 2010).

Hawaiian: Limu Ho`onunu (Abbott 1984).

Indonesian: Sangan (Chapman & Chapman 1980).

Common names used in commerce, often for edible algae
; "moss, Corsican"

Detailed distribution with sources (Click to Load)

Key references
Athanasiadis, A. (2016). Phycologia Europaea Rhodophyta Vol. II. pp. [2], 763-1504. Thessaloniki: Published and distributed by the author.

Dawes, C.J. & Mathieson, A.C. (2008). The seaweeds of Florida. pp. [i]- viii, [1]-591, [592], pls I-LI. Gainesville, Florida: University Press of Florida.

Hayee-Memon, A. & Shameel, M. (1996). A taxonomic study of some red algae commonly growing on the coast of Karachi. Pakistan Journal of Marine Sciences 5(2): 113-137.

Hernández, O.E., Sentíes, A., Dreckmann, K.M., Cassano, V. & Fujii, M.T. (2017). Species diversity and biogeographical patterns of Laurencia sensu stricto (Rhodophyta) in the Atlantic Ocean. Diversidad de especies y patrones biogeográ cos de Laurencia sensu stricto (Rhodophyta) en el océano Atlántico. Hidrobiologica 27(3): 301-314, 3 figs, 2 tables.

Machín-Sánchez, M., Gil-Rodríguez, M. & Haroun, R. (2018). Phylogeography of the red algal Laurencia complex in the Macaronesia region and nearby coastal areas: recent Advances and future perspectives. Diversity 10: 1-21, 2 figs.

Maggs, C.A. & Hommersand, M.H. (1993). Seaweeds of the British Isles. Volume 1. Rhodophyta. Part 3A. Ceramiales. pp. [i]-xv, 1-444, 129 figs, map. London: HMSO.

Nam, K.W. (2011). Algal flora of Korea. Volume 4, Number 3. Rhodophyta: Florideophyceae, Ceramiales: Rhodomelaceae: Laurencia, Chondrophycus, Palisada, Chondria. Marine red algae. pp. [1-6], 1-198, figs 1-141. Incheon: National Institute of Biological Resources.

Skelton, P.A. & South, G.R. (2007). The benthic marine algae of the Samoan Archipelago, South Pacific, with emphasis on the Apia District. Nova Hedwigia Beihefte 132: 1-350.

Suárez, A.M., Martínez-Daranas, B. & Alfonso, Y. (2015). Macroalgas marinas de Cuba. pp. [1]-264, 229 figs. La Habana [Havana]: UH [Universidad de La Habana] Editorial.

Trono, G.C., Jr (1997). Field guide and atlas of the seaweed resourves of the Philippines. pp. [i]-xx.[1]-306, 168 figs. Makati City, The Philippines: Bookmark, Inc..

Weber-van Bosse, A. (1913). Marine algae. Rhodophyceae, of the "Sealark" Expedition, collected by Mr. J. Stanley Gardiner, M.A.. Transactions of the Linnean Society of London, Second Series, Botany 8: 105-142, 1 fig, pls 12-14.

Zhang J.F. & Xia, B.M. (1988). Laurencia from China: key list and distribution of the species. In: Taxonomy of economic seaweeds with reference to some Pacific and Caribbean species. (Abbott, I.A. Eds) Vol.2, pp. 249-252. California Sea Grant College Program.

Zuccarello, G.C. & West, J.A. (2006). Molecular phylogeny of the subfamily Bostrychioideae (Ceramiales, Rhodophyta): subsuming Stictosiphonia and highlighting polyphyly in species of Bostrychia. Phycologia 45: 24-36.

Created: 31 March 1996 by M.D. Guiry

Verified by: 08 March 2021 by M.D. Guiry

Accesses: This record has been accessed by users 20645 times since it was created.

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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.)

Amico, V., Caccamese, S., Neri, P., Russo, G. & Foti, M. (1991). Brasilane-type sesquiterpenoids from the Mediterranean red alga Laurencia obtusa. Phytochemistry 30(6): 1921-1927.
Feldmann, J. & Feldmann, G. (1950). Les "corps en cerise" du Laurencia obtusa (Huds.) Lamour.. 1950 : 1335-1337.
Godin, J. (1973). Croissance et morphogenèse du Laurencia obtusa (Huds.) Lam. (Céramiales, Rhodomélacées). Soc Phycol de France Bull No 18: 8-13.
Godin, J. (1973). Structure des trichoblastes du Laurencia obtusa (Huds.) Lam. (Céramiales, Rhodomélacées). Soc Phycol de France Bull No 18: 14-19.
Guimaraens, M. A., Coimbra, C. A. & Coutinho, R. (1996). Modeling competition between Laurencia obtusa (Ceramiales, Rhodophyta) and Hypnea spinella (Gigartinales, Rhodophyta) at Cabo Frio Island, Rio de Janeiro, Brazil. Proceedings of the International Seaweed Symposium 15: 273-276.
Masuda, M. & Abe, T. (1993). The occurrence of Laurencia saitoi Perestenko (L. obtusa auct. japon.) (Ceramiales, Rhodophyta) in Japan. Japanese Journal of Phycology 41: 7-18.
Oztunc, A., Imre, S., Lotter, H. & Wagner, H. (1991). 2 C-15 bromoallenes from the red alga Laurencia obtusa. Phytochemistry 30(1): 255-257.
Sudatti, D.B., Rodrigues, S.V., Coutinho, R., da Gama, B.A.P., Salgado, L.T., Amado Filho, G.M. & Pereira, R.C. (2008). Transport and defensive role of elatol at the surface of the red seaweed Laurencia obtusa (Ceramiales, Rhodophyta). Journal of Phycology 44: 584-591.
Suzuki, M., Takahashi, Y., Matsuo, Y., Guiry, M.D. & Masuda, M. (1997). Scanlonenyne, a novel halogenated C15 acetogenin from the red alga Laurencia obtusa in Irish waters. Tetrahedron 53: 4271-4278.

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Cite this record as:
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 04 August 2021.

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