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

Merrifieldia J.Agardh, 1885

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

Holotype species: Merrifieldia ramentacea (C.Agardh) J.Agardh

Currently accepted name for the type species: Hypnea ramentacea (C.Agardh) J.Agardh

Original publication and holotype designation: Agardh, J.G. (1885). Till algernes systematik. Nya bidrag. (Fjerde afdelningen.). Lunds Universitets Ă…rskrift, Afdelningen for Mathematik och Naturvetenskap 21(8): 1-117, 1 pl.
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Taxonomic status: currently regarded as a synonym of Hypnea.

Most recent taxonomic treatment adopted: Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.

Description: A genus of non-parasitic species with the characters of the order. Plants of the largest species reach 50 cm in length from discoid holdfasts, although several species form sprawling tangles or low (< 5 cm high) turfs anchored by numerous basal attachments. Some of the most widespread species propagate by fragmentation after attachment to algae and other substrata by a myriad of tendril-like hooks. Tetrasporangial nemathecia partially or completely encircle the bases of short lateral branches.

Information kindly contributed by G.T. Kraft but may now be outdated.

Comments: Distribution: The type species is nearly cosmopolitan in tropical to warm-temperate seas, and is known to have been introduced to non-native localities such as Hawaii, where it has taken over large reef areas and is a considerable pest (Abbott, 1987). The genus has numerous representatives in the Mediterranean and Caribbean seas, the western and eastern Indian and Pacific Oceans, Australia and South Africa, with at least some representatives in most warm-water localities.

Numbers of names and species: There is only one species or infraspecific name in the database at present.

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.

Verification of data
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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: 14 January 2001 by M.D. Guiry

Verified by: 18 January 2011 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43185

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in 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.

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