Osmundaria J.V., 1813: 42
Holotype species: Osmundaria prolifera J.V.Lamouroux
Original publication and holotype designation: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.
Taxonomic status: currently recognized as a distinct genus.
Description: Thalli ligulate, up to 50 cm long, 1 cm broad, branched from margins or midrib, with characters similar to those of Vidalia but with blade surfaces often densely covered on both sides by adventitious branchlets which are branched and up to ~1 mm long. Tetrasporangial stichidia on cylindrical branchlets occurring on edges of distal serrations; 2 sporangia per segment forming 2 rows in the stichidium which is somewhat flattened, curved distally and dorsiventrally oriented sometimes with dorsal trichoblasts or scar cells.
Comments: Subtidal in southern and Western Australia. Analyses of species of Vidalia compared with Osmundaria strongly suggest that the two genera should not remain separate.
NCBI Nucleotide Sequences
Numbers of names and species: There are 13 species (and infraspecific) names in the database at present, of which 8 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Osmundaria colensoi (J.D.Hooker & Harvey) R.E.Norris S
Osmundaria fimbriata (J.V.Lamouroux) R.E.Norris C
Osmundaria intermedia (J.Agardh) De Toni S
Osmundaria melvillii (J.Agardh) R.E.Norris C
Osmundaria obtusiloba (C.Agardh) R.E.Norris C
Osmundaria oliveae R.E.Norris C
Osmundaria papenfussii R.E.Norris C
Osmundaria prolifera J.V.Lamouroux C - type
Osmundaria serrata (Suhr) R.E.Norris C
Osmundaria smithiae (Hooker & Harvey) Kuntze S
Osmundaria spiralis (Lamouroux) R.E.Norris S
Osmundaria spiralis var. cliftonii (Harvey) R.E.Norris C
Osmundaria volubilis (Linnaeus) R.E.Norris C
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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: http://www.algaebase.org/search/genus/detail/?genus_id=42517
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 May 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:7682