156,769 species and infraspecific names are in the database, 22,033 images, 60,598 bibliographic items, 449,807 distributional records.

Schmitzia P.C.Silva, 1959

Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Gigartinales
Family Calosiphoniaceae

Holotype species: Schmitzia neapolitana (Berthold) P.C.Silva

Original publication and holotype designation: Silva, P.C. (1959). Remarks on algal nomenclature II. Taxon 8: 60-64.
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Taxonomic status: currently recognized as a distinct genus.

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.

Nomenclatural notes
Substitute name for Bertholdia Schmitz, 1897, non Lagerheim, 1889. Monotypic when first introduced. - (30 Aug 2011) - M.D. Guiry

Description: Plants can reach over 60 cm in length and are erect from a discoid holdfast and are terete to flattened, and irregularly radially to distichously branched. Cells of the central axial filaments each bear 3 periaxial cells, although some species bear whorls of 4-5 (Maggs and Guiry, 1985) or 3-4 (Hawkes, 1982) cortical fascicles. Spermatangia form in pairs or clusters on surface cortical cells. Suporting cells are monocarpogonial, bearing 3-celled carpogonial branches. Carpogonia fuse with supporting cells following fertilization and issue up to 3 septate connecting filaments initially, later up to 10 following incorporation of additional cells into the carpogonial fusion cell. Connecting filaments give rise to dense globular clusters of carposporangia at swollen points along their length that cut off a single gonimoblast initial. Carpospores germinate to form crusts that either give rise to gametophytes directly (Hawkes, 1986) or to obliquely cruciate to irregularly zonate tetrasporangia (Maggs and Guiry, 1985).

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 23 Jan 2017 by M.D. Guiry.

Comments: Distribution: Atlantic Europe, the Mediterranean Sea, Japan, eastern and western Australia, and New Zealand. Most species occur in deep water, the gametophytes in addition being very seasonal and ephemeral.

Numbers of names and species: There are 6 species names in the database at present, of which 5 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.

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: 23 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=102

Citing AlgaeBase
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 18 November 2019.

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