153,622 species and infraspecific names are in the database, 20,981 images, 59,421 bibliographic items, 412,629 distributional records.

Rhodoglossum J.Agardh, 1876

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Gigartinales
Family Gigartinaceae

Lectotype species: Rhodoglossum lanceolatum (Harvey) J.Agardh

Currently accepted name for the type species: Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley

Original publication:Agardh, J.G. (1876). Species genera et ordines algarum, seu descriptiones succinctae specierum, generum et ordinum, quibus algarum regnum constituitur. Volumen tertium: de Florideis curae posteriores. Part 1. pp. [ii*-iii*], [i]-[viï], [1]-724. Lipsiae [Leipzig]: C.W.K. Gleerup.
 Download PDF

Type designated in Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Description: Exceptional plants of a Californian species are recorded up to 3 m in length (Abbott and Hollenberg 1976: 539), although most are 20-60 cm. Thalli are erect, usually in clusters, from a crustose base and are linear-foliose, with or without marginal lobes and branches, to narrowly subdichotomous. Cystocarps are embedded and incorporate a filamentous surrounding hull. Tetrasporangia form in intercalary chains from cells of anticlinal filaments in the cortex. Gametophytes of a common California species produce kappa carrageenans which are shown by Chapman (1984) to achieve highest gel strength in specimens deteriorating after more than 50 days on the beach in drift.

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 16 Mar 2016 by M.D. Guiry.

Comments: The type species is restricted to southeastern Australia, with other species coming from New Zealand (Chapman 1979), Antarctica (Arnaud and Delepine 1964), Japan (Mikami 1965) and weestern North America (Abbott and Hollenberg 1976). There is some doubt whether the type species of this genus is generically distinct from the suite of other species that have been associated with it, particularly the Northern Hemisphere representatives (Leister, Guiry, pers. comm). As presently defined, the genus differs from Gigartina by its non papilliform cystocarps, from Chondrus by the presence of a filamentous hull around the carposporophyte, and from Iridaea by the intercalary, cortical position of its catenate tetrasporangia.

Numbers of names and species: There are 32 species names in the database at present, as well as 7 infraspecific names. Of the species names, 6 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is 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):

Click here to also show infraspecific names in the list below.

References
Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. (1993). New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium 14: 105-120, 41 figs.

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

Contributors
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.

Created: 28 December 2000 by M.D. Guiry

Verified by:

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=35004

Citing AlgaeBase
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 November 2018.

SITE © 1996 - 2018 M.D. Guiry. All rights reserved.

Website Design : 249 Design Studio