163,335 species and infraspecific names are in the database, 22,769 images, 62,932 bibliographic items, 478,463 distributional records.

Petalomonas F.Stein, 1859

Empire Eukaryota
Kingdom Protozoa
Subkingdom Eozoa
Infrakingdom Infrakingdom Euglenozoa
Phylum Euglenozoa
Infraphylum Dipilida
Superclass Rigimonada
Class Stavomonadea
Subclass Homostavia
Order Petalomonadida
Family Scytomonadidae

Holotype species: Petalomonas abscissa (Dujardin) F.Stein

Original publication and holotype designation: Stein, F. [R. von] (1859). Die Organismus der Infusionsthiere nach eigenen Forschungen in systematischer Reihenfolge bearbeitet. I. Abtheilung Allgemeiner Theil und naturgeschichte der hypotrichen Infusionsthiere. pp. [i-vii], vii-xii, [1]-206, pls I-XIV. Leipzig: Verlag von Wilhelm Engelmann.
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Taxonomic status: currently recognized as a distinct genus.

Gender: This genus name is currently treated as feminine.

Description: Colorless, phagotrophic and/or osmotrophic flagellates, (5)25(60) _ (2)10(25) _m, with no special ingestion organelle visible in the light microscope; some species, at least, have a simple feeding apparatus consisting of a cytoplasmic pocket reinforced by microtubules; cells rigid, ovoid, fusiform or triangular, flattened, usually very flat and leaf-shaped, mostly with strong ribs or keels; canal opening subapical with one emergent flagellum, directed anteriorly, straight, during swimming; paramylon abundant. Freshwater, mainly benthic, in mud sediments; cosmopolitan.

Information contributed by: G.F. Leedale. The most recent alteration to this page was made on 1 Jan 2018 by M.D. Guiry.

Numbers of names and species: There are 95 species names in the database at present, as well as 30 infraspecific names. Of the species names, 83 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: 11 April 2002 by M.D. Guiry

Verified by: 01 January 2018 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=43644

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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 September 2021.

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