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Name derivation:

Saxon name of the ‘god of thunder’(Dawes and Mathieson 2008).


Osmundea  Stackhouse  1809;  22 of 26 species descriptions are currently accepted taxonomically (Guiry and Guiry 2016).

Subclass Florideophyceae; Order Ceramiales; Family Rhodomelaceae




Erect bushy thallus, fleshy to cartilaginous.  Flat polysiphonous axes with radial or pinnate branching.  Branchlets short and club-shaped (Dawes and Mathieson 2008).

Similar genera:




Tropical coasts, 24 – 45 m deep.



Dawes, C.J. and A.C. Mathieson  2008. Seaweeds of Florida. University Press of Florida (592 pp).

Guiry, M.D. and G.M. Guiry  2013.  AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 07 May 2013.

Stackhouse, J.  1809.  Tentamen marino-cryptogamicum, ordinem novum; in genera et species distributum, in Classe XXIVta Linnaei sistens.  Mémoires de la Société Imperiale des Naturalistes de Moscou 2: [50]-97.