Holotype species: Seirospora griffithsiana Harvey
Currently accepted name for the type species: Seirospora interrupta (Smith) F.Schmitz
Original publication and holotype designation: Harvey, W.H. (1846). Phycologia britannica, or, a history of British sea-weeds: containing coloured figures, generic and specific characters, synonymes, and descriptions of all the species of algae inhabiting the shores of the British Islands. pp. Text with plates, pls I-LXXVIII. London: Reeve & Benham.
Precise date of publicationApril 1846
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Hommersand, M.H., Freshwater, D.W., Lopez-Bautista, J.M. & Fredericq, S. (2006). Proposal of the Euptiloteae Hommersand et Fredericq, trib. nov. and transfer of some southern hemisphere Ptiloteae to the Callithamnieae (Ceramiaceae, Rhodophyta). Journal of Phycology 42: 203-225.
Description: Thallus erect, filamentous, ecorticate or with sparse rhizoidal cortication below, with a single lateral branch per axial cell arranged in an alternate-distichous or spiral pattern. Cells uninucleate. Spermatangia in short tufts, adaxial on lateral branches. Procarps on intercalary cells of major axes. Carposporophyte with branched gonimolobes composed almost entirely of carposporangia, generally with terminal chains of carposporangia, without an enveloping involucre but with accessory filaments arising from axial cells below the gonimoblast. Tetrasporangia sessile, tetrahedrally divided. Seirospores present or absent.
Information contributed by: Huisman (2018). The most recent alteration to this page was made on 6 Sep 2021 by M.D. Guiry.
Comments: Distinguished from Callithamnion mainly by uninucleate cells, structure of carposporophyte and presence of terminal seirospores.
Numbers of names and species: There are 14 species names in the database at present, as well as 1 infraspecific names. Of the species names, 9 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.
Choi, H.-G., Kraft, G.T., Kim, H.-S., Guiry, M.D. & Saunders, G.W. (2008). Phylogenetic relationships among lineages of the Ceramiaceae (Ceramiales, Rhodophyta) based on nuclear small subunit rDNA sequence data. Journal of Phycology 44: 1033-1048.
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: 06 September 2021 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33059
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 24 October 2021.