Ceramium, 1797, nom. et typ. cons.
Lectotype species: Ceramium virgatum Roth
Original publication and holotype designation: Roth, A.W. (1797). Catalecta botanica quibus plantae novae et minus cognitae describuntur atque illustrantur. Fasc. 1. pp. [i]-viii, -244 [1-2, index, pls], 8 pls. Lipsiae [Leipzig]: in Bibliopolo I.G. Mülleriano.
Precise date of publicationJan-Feb 1797
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as neuter.
Most recent taxonomic treatment adopted: Huisman, J.M. (2018). Algae of Australia. Marine benthic algae of north-western Australia. 2. Red algae. pp. [i]-xii, 1-672, 189 figs. Canberra & Melbourne: ABRS & CSIRO Publishing.
Type has been conserved. According to Huisman (2018: 385), "Ceramium" is derived from "...the Greek keramium (a vessel or pitcher). There have been several interpretations of the meaning of Ceramium. According to Harvey (1862: pl. CCVI) it is so-named because the fruit is not pitcher-shaped. Dawes & Mathieson (2008: 228) suggested a derivation from the Greek keras (horn) and Latin ium (a collection). However, Roth (op. cit. 147) stated that the genus was first described by Adanson (1763: 13) as Ceramion Adans., and there Adanson listed Ceramianthemum Donati as a synonym. Both of these genera are now regarded as synonyms of Gracilaria, and their descriptions emphasise the distinctive spherical cystocarp [capsule sphérique] characteristic of that genus. Thus, Ceramium is, in fact, named for the form of the reproductive structures in an unrelated genus (see Huisman, 2012)." - (25 Jan 2017) - M.D. Guiry
Description: Thallus filamentous, erect or with erect axes arising from a prostrate system. Axes wholly corticated or with nodal cortication; axial cells with 4 or more distal periaxial cells, these remaining undivided or dividing laterally to form pseudoperiaxial cells that lie between periaxial cells. Periaxial and pseudoperiaxial cells remaining undivided or cutting off acropetal and/or basipetal longitudinal filaments. Spermatangia borne 1–4 on mother cells covering nodes. Carposporophytes with several rounded sequentially developing gonimolobes, naked or subtended and surrounded by several determinate branches arising on the fertile axis. Tetrasporangia solitary, paired, or in whorls at nodes, immersed in or projecting beyond the cortex, naked or involucrate, cruciately, decussately or tetrahedrally divided.
Information contributed by: Huisman (2018). The most recent alteration to this page was made on 8 Oct 2018 by M.D. Guiry.
Numbers of names and species: There are 584 species names in the database at present, as well as 327 infraspecific names. Of the species names, 212 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.
Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.
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: 01 January 2001 by M.D. Guiry
Verified by: 08 October 2018 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=32768
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 12 December 2019.