Type species: a type species (generitype) appears not to have been designated.
Original publication:Wille, N. (1909). Conjugatae und Chlorophyceae. In: Die natürlichen Pflanzenfamilien ... Nachträge zum I. Teil, Abteilung 2 über die Jahre 1890 bis 1910. (Engler, A. & Prantl, K. Eds), pp. 1-96. Leipzig: Verlag von Wilhelm Engelmann.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Brodie, J., Maggs, C.A. & John, D.M. (2007). Green seaweeds of Britain and Ireland. pp. [i-v], vi-xii, 1-242, 101 figs. London: British Phycological Society.
Description: Heteromorphic life history with alternation of crustose gametophyte and filamentous sporophyte. Gametophytic stage forms confluent, multilayered spots on host. Each vegetative cell with single parietal chloroplast in upper part of cell. Sporophytes, only known from culture as irregularly branched filaments, able to penetrate calcareous material. Sporophytes unusual because only apical cells contain cytoplasm. These cells are slightly dilated compared with remaining cylindrical cells. During sexual reproduction all upper cells of gametophytic crust form sporangia simultaneously, producing biflagellate isogametes; at maturity these escape through pore at sporangium apex. Apical cells of sporophyte transform into sporangia and produce quadriflagellate zoospores released through papilla or small exit tube. Haploid chromosome number = 6 in P. confluens. Pseudopringsheimia epiphytic on large brown algae from North Atlantic and North Pacific Oceans. Considered by some authors as synonym of Pseudendoclonium.
Information contributed by: R. Nielsen. The most recent alteration to this page was made on 2 Feb 2011 by M.D. Guiry.
Numbers of names and species: There are 4 species names in the database at present, of which 1 has 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: 28 December 2000 by M.D. Guiry
Verified by: 02 February 2011 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=32813
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 September 2018.