155,256 species and infraspecific names are in the database, 21,864 images, 60,045 bibliographic items, 435,064 distributional records.

Rhodophysema Batters, 1900

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Nemaliophycidae
Order Palmariales
Family Rhodophysemataceae

Holotype species: Rhodophysema georgei Batters

Original publication and holotype designation: Batters, E.A.L. (1900). New or critical British marine algae. Journal of Botany, British and Foreign 38: 369-379, pl. 414.
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Saunders, G.W., Jackson, C. & Salomaki, E.D. (2017 '2018'). Phylogenetic analyses of transcriptome data resolve familial assignments for genera of the red-algal Acrochaetiales-Palmariales complex (Nemaliophycidae). Molecular Phylogenetics and Evolution 119: 151-159, 2 fig., 3 tables.

Nomenclatural notes
Monotypic when first introduced. - (20 Jan 2017) - M.D. Guiry

Description: Noncalcareous crust, epiphytic or epilithic. Basal layer bearing uniseriate filaments, loosely adjoined, unbranched or sparingly branched to two orders. Rhizoids and cuticle lacking. Female reproductive structures undescribed. One or two spermatangia produced by terminal cells of erect filaments. Tetrasporophyte isomorphic. Tetrasporangia cruicate, attached basally, borne terminally on erect filaments just below or at surface of thallus. Spore germination: diprotocellular type.

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 16 Apr 2018 by M.D. Guiry.

Comments: Hokkaido, Japan; eastern Greenland; eastern Canadian Arctic.

Numbers of names and species: There are 9 species names in the database at present, as well as 2 infraspecific names. Of the species names, 7 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
Saunders, G.W. & McLachlan, J.L. (1990 '1989'). Taxonomic considerations of the genus Rhodophysema and the Rhodophysemataceae fam. nov. (Rhodophyta, Florideophycidae). Proceedings of the Nova Scotian Institute of Science 39: 19-26.

Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.

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: 16 April 2018 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=32957

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 May 2019.

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