Halopteris Kützing, 1843
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, -142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.
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 2014-06-20 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
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, 1 fig., 1 table.
Comments: According to Sauvageau (l.c.) Stypocaulon (and Anisocladus) are synonyms of Halopteris. This is not accepted here.
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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.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=37623
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 20 June 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 10 December 2023