155,597 species and infraspecific names are in the database, 21,916 images, 60,165 bibliographic items, 438,693 distributional records.

Deuterocharacium Petrý, 1969

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Viridiplantae
Infrakingdom Chlorophyta infrakingdom
Phylum Chlorophyta
Subphylum Chlorophytina
Class Chlorophyceae
Order Sphaeropleales
Family Characiaceae

Holotype species: Deuterocharacium polyplastidicum Petrý-Hesse

Taxonomic status: currently recognized as a distinct genus.

Description: Solitary, cylindrical to ovate cells attached to substratum with mucilaginous basal pad or short pedicel. At upper end cells rounded to pointed. Cells 30-50 x 6-12 &m with smooth cell walls. Cells uninucleate?; numerous parietal, discoid to plate-like chloroplasts per cell; pyrenoids and stigma absent. Bourrelly (1972) states that Deuterocharacium is multinucleate, however, this may be prior to sporogenesis. Asexual reproduction by biflagellate zoospores; 32-128 spores per sporangium, released by tear in lateral wall. Zoospores with anterior contractile vacuoles, single parietal band shaped chloroplast with pyrenoid. After swimming period, spores attach by anterior end. Sexual reproduction unknown. Genus attached to other algae or detritus in freshwater; reported only from Austria and Czechoslovakia. Deuterocharacium separated from Characium by the absence of a pyrenoid, and from Pseudochlorothecium by the absence of autospores and by the lack of a sporulation vesicle. Bourrelly (1972), considered Deuterocharacium and Pseudochlorothecium synonymous. Species distinguished based on differences in cell size and shape. Genus assigned by Ettl and Komárek (1982) to new family and order Rhopalosolenaceae, Protosiphonales, however, this taxonomy not accepted by subsequent authors.

Information contributed by: D. Garbary and T. Kalina. The most recent alteration to this page was made on 17 Sep 2004 by Robert Wilkes.

Numbers of names and species: There are 2 species names in the database at present, as well as 1 infraspecific names. Of the species names, 2 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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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: 17 September 2004 by Robert Wilkes

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Citing AlgaeBase
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 June 2019.

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