Chordaria C.Agardh, 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, [1]-135. Lundae [Lund]: Ex officina Berlingiana.

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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 2015-10-19 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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, 1 fig., 1 table.

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.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 19 October 2015. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 16 April 2024

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