155,270 species and infraspecific names are in the database, 21,864 images, 60,052 bibliographic items, 436,032 distributional records.

Halopteris Kützing, 1843

Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Phaeophyceae
Subclass Dictyotophycidae
Order Sphacelariales
Family Stypocaulaceae

Holotype species: Halopteris filicina (Grateloup) Kützing

Original publication and holotype designation: Kützing, F.T. (1843). Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange. Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Silberfeld, T., Rousseau, F. & Reviers, B. de (2014). An updated classification of brown algae (Ochrophyta, Phaeophyceae). Cryptogamie Algologie 35(2): 117-156.

Description: Plants forming 3-15 (-20) cm tall, usually epilithic, reddish brown or dark brown to olivaceous, erect tufts or complanate erect heterotrichous thalli. Deep water plants often of smaller sizes. Basal parts consisting of small or extensive polystromatic discs, often totally covered by matted descending corticating rhizoids. Discs and rhizoids not occuring in unattached, free-living plants. Erect, terete, articulate, leptocaulous, much branched axes with acroheteroblastic, distichous-alternately branched, usually determinate laterals, up to the fifth order. Forming one lenticular branch initial from each conspicuous cylindrical apical cell before a segment is cut off. Segments each dividing transversely once preceeding frequent longitudinal and transverse segmentation. Internal structure of larger medullary cells covered by a small-celled cortex, often further corticated by descending corticating rhizoids. Hairs absent or sparse in pairs in axils of laterals. Pericysts absent. Reproductive structures: solitary or geminate plurilocular gametangia and solitary unilocular zoidangia. Cosmopolitan marine in lower intertidal and sublittoral, usually in temperate regions. The diplohaplontic life history is isomorphic, anisogamic and monoecious. Parthenogenesis and ephebogenesis have been observed. Unattached forms occur in seagrass meadows in Europe and occasionally in deep water. These sterile forms propagate only by fragmentation. Basic chromosome number (for H. filicina) 8 according to Ernst-Schwarzenbach (1957).

Information contributed by: Prud'homme van Reine. The most recent alteration to this page was made on 20 Jun 2014 by M.D. Guiry.

Comments: According to Sauvageau (l.c.) Stypocaulon (and Anisocladus) are synonyms of Halopteris. This is not accepted here.

Numbers of names and species: There are 20 species names in the database at present, as well as 9 infraspecific names. Of the species names, 14 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.

Womersley, H.B.S. (1987). The marine benthic flora of southern Australia. Part II. pp. 481, 169 figs, 1 table, 8 plates, 4 maps. Adelaide: South Australian Government Printing Division.

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

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: 20 June 2014 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=37623

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 25 May 2019.

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