155,138 species and infraspecific names are in the database, 21,787 images, 59,962 bibliographic items, 434,255 distributional records.

Goniomonas Stein, 1878

Empire Eukaryota
Kingdom Chromista
Phylum Cryptophyta
Class Cryptophyceae
Order Cryptomonadales
Family Cryptomonadaceae

Lectotype species: Goniomonas truncata (Fresenius) F.Stein

Original publication and holotype designation:

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Clay, B.L., Kugrens P. & Lee, R.E. (1999). A revised classification of Cryptophyta. Botanical Journal of the Linnean Society 131: 131-152.

Description: Free-swimming, flattened, biflagellate monads, elliptic in lateral view with an obliquely truncate anterior; a furrow extends along the middle of the anterior margin and for a short distance down the ventral margin and is surrounded by a single lateral row of ejectisomes; lacking chloroplasts, pyrenoids, nucleomorphs and starch; the periplast with longitudinal striations more or less visible in all species. Reproduction by simple cell division, the cells cleaving laterally in an anterior-posterior direction. Cysts production and palmelloid colonies are unknown. Goniomonas is the only cryptomonad so far examined that does not possess a plastidial complex, and is therefore considered primitive. The flagella have an unusual ultrastructure and the furrow-gullet system is located on the anterior of the cell rather than the usual ventral location. The storage product is oil. The genus is well known in freshwater habitats with a cosmopolitan distribution, but is rarely abundant. It is also present in marine waters although rarely recorded.

Information contributed by: D.R.A. Hill. The most recent alteration to this page was made on 8 Apr 2013 by M.D. Guiry.

Comments: Kugrens & Clay (2002) record this genus as being a member of the Goniomonadophyceae.

Numbers of names and species: There are 5 species names in the database at present, of which 4 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):

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Verification of data
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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: 01 May 2003 by M.D. Guiry

Verified by: 08 April 2013 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=46455

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 25 April 2019.

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