156,358 species and infraspecific names are in the database, 22,018 images, 60,432 bibliographic items, 446,051 distributional records.

Wellheimia Pascher, 1917

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Chrysophyceae
Order Chromulinales
Family Chromulinaceae

Holotype species: Wellheimia pfeifferi Pascher

Original publication and holotype designation: Pascher, A. (1917). Flagellaten und Rhizopoden in ihrer gegenseitigen Beziehungen. Archiv für Protistenkunde 38: 1-87.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Kristiansen, J. & Preisig, H.R. (2001). Encyclopedia of Chrysophyte genera. Bibliotheca Phycologica 110: 1-260.

Description: Cells naked, more or less cylindrical, with a single emergent flagellum inserted centrally at the truncate anterior end, posterior end of the cell rounded. Protoplast with two chloroplasts and 1-2 contractile vacuoles. The main characteristic feature of this genus is a single axopodium which is retractile and apparently containing an axoneme. The axopodium originates laterally at the truncate anterior end, extending forwards at an oblique angle for up to the length of the cell or more. The extension seems to be influenced by chemotactic stimuli. Cells are able to ingest food in large quantities. Reproduction and stomatocysts unknown. Found in Czechia in polluted freshwater. Known only from the original description. This poorly known genus closely resembles Chromulina except for the axopodium which is somewhat reminiscent of the axopodial tentacles of pedinellids.

Information contributed by: H.R. Preisig. The most recent alteration to this page was made on 22 Aug 2016 by M.D. Guiry.

Comments: Kristiansen & Preisig (2001: 9) record this genus as alternately being a member of the family Ochromonadaceae Lemmerman 1899.

Numbers of names and species: There is only one species or infraspecific name in the database at present, which has 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: 27 May 2002 by Elizabeth Moran

Verified by: 22 August 2016 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44846

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 21 September 2019.

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