154,579 species and infraspecific names are in the database, 21,106 images, 59,785 bibliographic items, 419,600 distributional records.

Norrissia Balakrishnan, 1980

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Halymeniales
Family Halymeniaceae

Holotype species: Norrissia setchellii (Kylin) Balakrishnan

Original publication and holotype designation: Balakrishnan, M.S. (1980). Taxonomic studies on U.S. Pacific Cryptonemiaceae I. Two new genera: Isabbottia and Norrissia. In: Taxonomy of algae. Papers presented at the International Symposium on Taxonomy of Algae held at the Centre of Advanced Study in Botany, University of Madras, December 9-16, 1974. (T.V. Desikachary & V.N. Raja Rao Eds), pp. 273-286. Madras: University of Madras..

Taxonomic status: currently recognized as a distinct genus.

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.

Description: Flattened, lanceolate, with surface and marginal proliferations, themselves sometimes proliferous. Stipe short. Medulla of periclinal filaments intermixed with rhizoids. Cortex of oblong to spherical cells, progressively smaller toward cuticle. Carpogonial branch 3-4-celled, not found in ampulla; supporting cell with a one-celled sterile lateral. Auxiliary cell subterminal on a primary ampullar filament, within a separate ampulla with branching to four orders. Fertilized carpogonium initiating connecting filaments directly, each contacting a single auxiliary cell. Distinct gonimolobes developing from gonimoblast initial. Spermatangia apparently undescribed. Tetrasporophyte isomorphic. Tetrasporangia small, cruciate, attached sub-basally within the cortex.

Information contributed by: S.C. Lindstrom & J.A. Lewis. The most recent alteration to this page was made on 8 Oct 2010 by M.D. Guiry.

Comments: Known only from the northeast Pacific: southern British Columbia to central California. Requires reinvestigation.

Numbers of names and species: There is only one species or infraspecific name in the database at present, which 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.

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.

Created: 28 December 2000 by M.D. Guiry

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Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42241

Citing AlgaeBase
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 February 2019.

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