Coelothrix Børgesen, 1920
Holotype species: Coelothrix irregularis (Harvey) Børgesen
Original publication and holotype designation: Børgesen, F. (1920). The marine algae of the Danish West Indies. Part 3. Rhodophyceae (6). Dansk Botanisk Arkiv 3: 369-504, Figs 361-435.
Request PDFDescription: Plants forming firm cushions; fronds erect, terete or slightly compressed, irregularly branched with branches anastomosing frequently; cortex of 5-6 layers of large cells covered by a complete layer of small cells; medullary cavity small, septa absent, containing a few longitudinal filaments bearing inwardly-directed secretory cells and filled with a watery mucilage.
Information contributed by: M.D. Guiry. The most recent alteration to this page was made on 2021-08-21 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: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.
Comments: The cystocarp of C. irregularis has been found on only one occasion (Collins 1901, as Cordylecladia irregularis), but full details were not given. Ginsberg-Ardré & Palmahina (1964, pl. 1, fig. 4; pl. 2, fig. 2) have described the spermatangia of C. irregularis, and they resemble the spermatangia of Lomentaria clavellosa (cf. Kylin 1928, fig. 33) and other members of the Champiaceae and Lomentariaceae. Further knowledge of the cystocarp is necessary before this genus can be clearly distinguished from Lomentaria (q.v.). Taylor (1960) stated that the tetrasporangia of his material of the type species were “...aggregated in slightly swollen branch tips.”, but he did not state whether or not the tetrasporangia are borne in pits in a manner similar to that found in species of Lomentaria.
Coelothrix irregularis is widespread in the Caribbean (Taylor 1960) and the Indian and Pacific Oceans (Ginsberg-Ardré & Palmahina 1964, p. 329), and occurs in Portugal (Ginsberg-Ardré & Palmahina 1964; Ardré 1970).
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=33250
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 21 August 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024
