154,548 species and infraspecific names are in the database, 21,106 images, 59,782 bibliographic items, 419,596 distributional records.

Schizymenia J.Agardh, 1851, nom. et typ. cons.

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

Holotype species: Schizymenia dubyi (Chauvin ex Duby) J.Agardh

Original publication and holotype designation: Agardh, J.G. (1851). Species genera et ordines algarum, seu descriptiones succinctae specierum, generum et ordinum, quibus algarum regnum constituitur. Volumen secundum: algas florideas complectens. Part 1. pp. [i]-xii, [1]-336 + 337-351 [Addenda and Indices]. Lundae [Lund]: C.W.K. Gleerup.
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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.

Nomenclatural notes
The name and type has been conserved. - (24 Jan 2017) - M.D. Guiry

Description: Plants of the largest species reach 70 cm in length. Thalli are foliose and of generally firm consistency. Cortices contain prominent gland cells. Fertilized carpogonia first fuse to adjacent nutritive auxiliary cells borne on the supporting cells, from which cells the connecting filaments radiate. Besides elucidating these details, Ardre (1980) has shown that carpospores germinate into tetrasporangial crusts identical in morphology to the type species of Haematocelis, with Sciuto et al. 1979) finding confirming evidence in an amino acid common to the gametophytic and tetrasporangial phases. Tetrasporangia are zonately divided.

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 24 Jan 2017 by M.D. Guiry.

Comments: Distribution: The type species is widespread in Atlantic Europe from Great Britain to Morocco, appearing sporadically in the Mediterranean (Sciuto et al. 1979). Other species occur in Japan, the eastern Pacific from Alaska to Baja California, Chili, New Zealand, southern Australia and South Africa. Although plants have recorded from 18 m depths (Abbott and Hollenberg 1976), the genus as a whole seems to be characteristic of lower intertidal to shallow subtidal habitats.

Numbers of names and species: There are 23 species names in the database at present, as well as 2 infraspecific names. Of the species names, 10 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.

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

Verified by: 24 January 2017 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=101

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 20 February 2019.

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