149,967 species and infraspecific names are in the database, 20,386 images, 57,648 bibliographic items, 380,221 distributional records.

Griffithsia C.Agardh, 1817, nom. cons.

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Suborder Spermothamniineae
Family Wrangeliaceae
Tribe Griffithsieae

Holotype species: Griffithsia corallina C.Agardh

Currently accepted name for the type species: Griffithsia corallinoides (Linnaeus) Trevisan

Original publication and holotype designation: Agardh, C.A. (1817). Synopsis algarum Scandinaviae, adjecta dispositione universali algarum. pp. [i]-xl, [1]-135. Lundae [Lund]: Ex officina Berlingiana.
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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: 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.

Nomenclatural notes
Name and orthography conserved. - (25 Jan 2017) - M.D. Guiry

Description: Thallus to 15(-30) cm, axes subdichotomously or laterally branched, ecorticate or rhizoidally corticated below. Cells large, multinucleate. Whorls of polychotomous trichoblasts often associated with reproductive structures. Female axis lateral, 3-celled, subapical cell bearing an abaxial pericentral cell and 1(-2) adaxial supporting cells, each with sterile apical cell and 1(-2) 4-celled carpogonial branches. Fusion of carpogonium either directly with supporting cell by means of connecting cell or with auxiliary cell cut off from supporting cell without involvement of connecting cell.Carposporophyte with globose carposporangia and involucre of 2-celled filaments borne on hypogenous cell with large outer cells curved around carposporophyte. Fusion cell large. Spermatangia and tetrasporangia on whorls of polychotomous fascicles clustered in constrictions between axial cells. Easily recognized by large globular to cylindrical multinucleate axial cells.

Information contributed by: E.M. Wollaston. The most recent alteration to this page was made on 25 Jan 2017 by M.D. Guiry.

Comments: Widespread on rocks or epiphytic in sublittoral to eulittoral zone and in rock-pools. Recent redefinition of the genus by Baldock (1976) excludes several species previously assigned to Griffithsia and leads to 4 subgeneric groups based largely on tetrasporangial and spermatangial features.

Numbers of names and species: There are 59 species names in the database at present, of which 39 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):

Griffithsia aestivana C.W.Schneider & C.E.Lane C 
Griffithsia antarctica J.D.Hooker & Harvey C 
Griffithsia ardissonei Zanardini S 
Griffithsia australis (C.Agardh) C.Agardh S 
Griffithsia balara Baldock C 
Griffithsia barbata C.Agardh S 
Griffithsia capitata Børgesen C 
Griffithsia caribaea G.Feldmann C 
Griffithsia caudata Schousboe P 
Griffithsia chilensis Montagne ex Kützing C 
Griffithsia coacta Okamura C 
Griffithsia confervoides Suhr C 
Griffithsia corallina C.Agardh S - type
Griffithsia corallinoides (Linnaeus) Trevisan C 
Griffithsia crassiuscula C.Agardh C 
Griffithsia crinita Kützing S 
Griffithsia devoniensis Harvey C 
Griffithsia elegans Baldock C 
Griffithsia flosculosa (J.Ellis) Batters S 
Griffithsia genovefae Feldmann C 
Griffithsia globifera (Harvey) J.Agardh S 
Griffithsia globulifera Harvey ex Kützing C 
Griffithsia gracilis Harvey S 
Griffithsia grandis Kützing C 
Griffithsia gunniana J.Agardh C 
Griffithsia heteroclada Yamada & Hasegawa C 
Griffithsia heteromorpha Kützing C 
Griffithsia intertexta Schousboe P 
Griffithsia intricata Schousboe P 
Griffithsia irregularis C.Agardh S 
Griffithsia japonica Okamura C 
Griffithsia metcalfii C.K.Tseng C 
Griffithsia monilis Harvey C 
Griffithsia myriophyllum Schousboe P 
Griffithsia okiensis Kajimura C 
Griffithsia opuntioides J.Agardh C 
Griffithsia ovalis Harvey C 
Griffithsia pacifica Kylin C 
Griffithsia phyllamphora J.Agardh C 
Griffithsia pilalyea Baldock C 
Griffithsia pulvinata Baldock C 
Griffithsia radicans Kützing C 
Griffithsia redicata Schousboe P 
Griffithsia rhizoidea Noda S 
Griffithsia rhizophora Grunow ex Weber-van Bosse C 
Griffithsia schousboei Montagne C 
Griffithsia secundiramea Vickers C 
Griffithsia subbiconica Stegenga S 
Griffithsia subcylindrica Okamura C 
Griffithsia teges Harvey C 
Griffithsia tenuis C.Agardh S 
Griffithsia tenuissima Zanardini U 
Griffithsia thyrsigera (Thwaites ex Harvey) Grunow S 
Griffithsia tingitana Schousboe P 
Griffithsia tomo-yamadae Okamura C 
Griffithsia torulosa Zanardini C 
Griffithsia traversii (J.Agardh) Baldock C 
Griffithsia venusta Yamada C 
Griffithsia weber-van-bosseae Børgesen C 

References
Choi, H.-G., Kraft, G.T., Kim, H.-S., Guiry, M.D. & Saunders, G.W. (2008). Phylogenetic relationships among lineages of the Ceramiaceae (Ceramiales, Rhodophyta) based on nuclear small subunit rDNA sequence data. Journal of Phycology 44: 1033-1048.

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: 01 January 2001 by M.D. Guiry

Verified by: 25 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=b2d297eea7c785edd

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 November 2017.

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