154,548 species and infraspecific names are in the database, 21,106 images, 59,782 bibliographic items, 419,596 distributional records.

Halymenia C.Agardh, 1817, nom. cons.

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

Lectotype species: Halymenia floresii (Clemente) C.Agardh

Original publication: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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Type designated in Schmitz, F. (1889). Systematische Übersicht der bisher bekannten Gattungen der Florideen. Flora oder Allgemeine botanische Zeitung 72: 435-456, pl. XXI.
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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.

Description: Thallus erect, blade-like, with a discoid holdfast, with or without a short stipe. Blades branched or not. Structure multiaxial, with a medulla of sparse, loosely interwoven, periclinally directed filaments, as well as anticlinal filaments that traverse the medulla; refractive or ganglionic cells usually present. Cortex of dichotomously divided filaments, occasionally forming a loose pseudoparenchyma. Spermatangia arising from outer cortical cells. Carpogonal branches and auxiliary cell branches in spatially separate ampullae. Cystocarps immersed, with a lax filamentous pericarp. Tetrasporangia formed in the outer cortex, cruciately or decussately divided. Emended by Rodríguez-Prieto & S.-M. Lin in Rodríguez-Prieto et al., 2018: 534.

Information contributed by: J. Huisman & O. De Clerck (2018).. The most recent alteration to this page was made on 30 Nov 2018 by Wendy Guiry.

Numbers of names and species: There are 175 species names in the database at present, as well as 40 infraspecific names. Of the species names, 81 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
Rodríguez-Prieto, C., De Clerck, O., Huisman, J.M. & Lin, S.-M. (2018). Systematics of the red algal genus Halymenia (Halymeniaceae, Rhodophyta): characterization of the generitype H. floresii and description of Neofolia rosea gen. et sp. nov. European Journal of Phycology 53(4): 520-536.

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: 24 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=18

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 20 February 2019.

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