155,876 species and infraspecific names are in the database, 21,968 images, 60,249 bibliographic items, 439,627 distributional records.

Halothrix Reinke, 1888

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Phaeophyceae
Subclass Fucophycidae
Order Ectocarpales
Family Chordariaceae

Holotype species: Halothrix lumbricalis (Kützing) Reinke

Original publication and holotype designation: Reinke, J. (1888). Die braunen Algen (Fucaceen und Phaeosporeen) der Kieler Bucht. Berichte der deutsche botanischen Gesellschaft 6: 14-20.

Precise date of publication17 Feb 1888

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: Thallus epiphytic, forming tufts to 20 mm high, generally on Seagrass. Thallus consisting of basal horizontal filaments on host that issue erect filaments forming a medulla of less pigmented cells, short pigmented cortical filaments and long assimilatory filaments with basal intercalary meristem. Medulla and short cortical filaments may be much reduced. Erect filaments are rarely branched towards base. Reproductive organs are ovate to elongate-pyriform unilocular sporangia, which are not present in all species, formed from upper medullary cells, and multiseriate plurilocular sporangia formed by subdivision including longitudinal divisions of cells of the long assimilatory filaments. Phaeophycean hairs present. Life history direct.

Information contributed by: A. F. Peters. The most recent alteration to this page was made on 20 Jun 2014 by M.D. Guiry.

Comments: Distributed in cold and warm-temperate seas of the northern hemisphere and in southern Australia.

Numbers of names and species: There are 7 species names in the database at present, as well as 2 infraspecific names. Of the species names, 5 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.

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: 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=33411

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 23 July 2019.

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