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Osmundea truncata (Kützing) K.W.Nam & Maggs 1994

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


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Osmundea truncata (Kützing) K.W.Nam & Maggs
The Fleet, Dorset; section to show hylaline needles in medulla. Width of large medullary cell with needle 85 microns. 24 Aug 2011. Francis Bunker. © Francis Bunker.

Click Here to Download';">Osmundea truncata (Kützing) K.W.Nam & Maggs
The Fleet, Dorset; section of thallus. 24 Aug 2011. Francis Bunker. © Francis Bunker" .

Osmundea truncata (Kützing) K.W.Nam & Maggs
The Fleet, Dorset; note iridescence underwater.. 24 Aug 2011. Francis Bunker. © Francis Bunker.


Nitophyllum litteratum J.Agardh

Osmundea truncata (Kützing) K.W.Nam & Maggs The Fleet, Dorset; section to show hylaline needles in medulla. Width of large medullary cell with needle 85 microns
© Francis Bunker

Publication details
Osmundea truncata (Kützing) K.W.Nam & Maggs in K.W.Nam, Maggs & Garbary 1994: 393

Published in: Nam, K.W., Maggs, C.A. & Garbary, D.J. (1994). Resurrection of the genus Osmundea with an emendation of the generic delineation of Laurencia (Ceramiales, Rhodophyta). Phycologia 33(5): 384-395, 38 figs, 3 tables.
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Type species
The type species (lectotype) of the genus Osmundea is Osmundea expansa Stackhouse.

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

Laurencia truncata Kützing

Type information
Holotype locality: Pirano, Croatia (Maggs & Hommersand 1993: 408). Holotype: Pius Titius; L 941.99.271 (Maggs & Hommersand 1993: 408).

Origin of species name
Adjective (Latin), truncate, i.e., ending very abruptly as if cut straight across (Stearn 1985).

Homotypic Synonym(s)
Laurencia truncata Kützing 1865

Taxonomic notes
Osmundea truncata is a distinct species, morphologically separate from O. oederi (Gunnerus) G.Furnari; for a detailed discussion of this see Nam, Maggs, McIvor & Stanhope (2000, as "Osmundea ramossima"); see also notes under O. oederi here. Guiry (1997) cites Laurencia platycephala sensu Magne as a synonym of this species, but many specimens passing under this name can be O. oederi.

Distributional notes
This is the species to which most Mediterranean records of Laurencia pinnatifida (or Osmundea pinnatifida) must be referred; see papers of Furnari & Serio (1993) and Nam, Maggs, McIvor & Stanhope (2000).

General environment
This is a marine species.

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.

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.

Machín-Sánchez, M., Rousseau, F., Le Gall, L., Cassano, V., Neto, A.I., Sentíes, A., Fujii, M.T. & Gil-Rodríguez, M.C. (2016). Species diversity of the genus Osmundea (Ceramiales, Rhodophyta) in the Macaronesian region. Journal of Phycology 52(4): 664-681.

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.

Serio, D., Petrocelli, A., Cormaci, M., Cecere, E. & Furnari, G. (2008). First record of Osmundea oederi (Gunnerus) G. Furnari comb. nov. (Rhodomelaceae, Rhodophyta) from the Mediterranean Sea. Cryptogamie, Algologie 29: 119-127.

Created: 17 May 1996 by M.D. Guiry

Verified by: 10 February 2018 by M.D. Guiry

Accesses: This record has been accessed by users 2635 times since it was created.

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Citing AlgaeBase
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 07 May 2021.

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