163,851 species and infraspecific names are in the database, 22,783 images, 63,080 bibliographic items, 481,368 distributional records.

Gonatozygon De Bary, 1858

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Viridiplantae
Infrakingdom Streptophyta infrakingdom
Phylum Charophyta
Class Zygnematophyceae
Subclass Zygnematophycidae
Order Desmidiales
Family Gonatozygaceae

Lectotype species: Gonatozygon monotaenium De Bary

Original publication:Bary, A. de (1856). Zu Gonatozygon monotaenium de Bary. Rabenh. Algen Mitteleurop. Dec. 54 No. 539. Hedwigia 1: 105-106.
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Type designated in Guiry, M.D. (2013). Taxonomy and nomenclature of the Conjugatophyceae (=Zygnematophyceae). Algae. An International Journal of Algal Research 28: 1-29.
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Taxonomic status: currently recognized as a distinct genus.

Description: Cells solitary or in short filaments, medium sized to large (48-759 um long), elongate-cylindric to elongate fusiform (length 7-40 times width), with truncate ends. Cell wall smooth or with scattered granules, setae or spines; wall in some species with girdle-bands. Ultrastructurally, cell wall two-layered: an outer perforated layer (including any granules or spines), and an inner, more or less continuous, layer. Chloroplasts 1-2 per cell, axial ribbon-like with row of up to 16 pyrenoids. Nucleus in middle, beside chloroplast, or between chloroplasts if two present. Asexual reproduction by transverse cell division. Sexual reproduction by conjugation known for 3 species. Gametangia geniculate before narrow conjugation tube forms. Zygospores in conjugation tube, spherical, smooth-walled. Gonatozygon cosmopolitan, in acidic, oligotrophic lakes and ponds, or in Sphagnum bogs.

Information contributed by: J.F. Gerrath. The most recent alteration to this page was made on 12 Sep 2013 by M.D. Guiry.

Numbers of names and species: There are 19 species names in the database at present, as well as 28 infraspecific names. Of the species names, 12 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: 11 April 2002 by M.D. Guiry

Verified by: 12 September 2013 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43555

Citing AlgaeBase
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 20 October 2021.

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