Chordaria C., 1817, nom. cons.
Holotype species: Chordaria flagelliformis (O.F.Müller) C.Agardh
Original publication and holotype designation: Agardh, C.A. (1817). Synopsis algarum Scandinaviae, adjecta dispositione universali algarum. pp. [i]-xl, -135. Lundae [Lund]: Ex officina Berlingiana.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
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: Epilithic or epiphytic in intertidal and subtidal zone. Erect thalli attached by a small disc, solitary or caespitose, simple or branched, cylindrical or slightly compressed, solid but later becoming partly hollow, lubricous, up to 1.5 m in height and 2 mm in diameter medium to dark brown in color, haplostichous, composed of multiaxial medullary layer and cortical assimilatory layer. Medullary layer composed of colorless, relatively large, longitudinally arranged, densely packed filaments. Assimilatory filaments composed of 6-8 cells, simple, densely packed, pigmented, nearly isodiametric but terminated with slightly larger cell. Phaeophycean hairs present. Each cell contains several disc-shaped or elongate chloroplasts with pyrenoids. Unilocular sporangia borne on the basal cells of assimilatory filaments, ovoid or pyriform, sessile. Plurilocular sporangia not detected on erect thalli (except for C. cladosiphon).
Information contributed by: H. Kawai. The most recent alteration to this page was made on 19 Oct 2015 by M.D. Guiry.
Comments: Kornmann (1962) reported direct or heteromorphic but asexual life history in C. flagelliformis. Distributed widely in the cold and temperate water area of both hemispheres.
Numbers of names and species: There are 40 species names in the database at present, as well as 13 infraspecific names. Of the species names, 8 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.
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: 29 December 2000 by M.D. Guiry
Verified by: 19 October 2015 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 01 October 2020.