157,570 species and infraspecific names are in the database, 22,210 images, 60,985 bibliographic items, 458,958 distributional records.

Marthea Pascher, 1918

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

Holotype species: Marthea tetras Pascher

Original publication and holotype designation: Pascher, A. (1818). Amoeboide Stadien bei einer Protococcales, nebst Bemerkungen ├╝ber den primitiven Charakter nicht festsitzender Algenformen. Berichte der Deutschen Botanischen Gesellschaft 36(5): 253-260.

Taxonomic status: currently recognized as a distinct genus.

Description: Four celled cruciate colonies with cells in single plane; with 16 cells prior to sporangial release. Colony and cell dimensions not recorded. Cells spindle shaped to fusiform with basal end truncate and attached to central mucilaginous mass; upper end free and quickly tapering to point. Cell walls smooth. Cells uninucleate; single chloroplast band shaped and parietal with single pyrenoid. Asexual reproduction by autospores; four per sporangium. Autospores originally amoeboid, with contractile vacuoles and stigma, before aligning into new colony prior to sporangial release. Flagellated stages and sexual reproduction unknown. Marthea planktonic in freshwater; known only from original collections in Czechoslovakia. Genus poorly known and requires complete reinvestigation.

Information contributed by: D. Garbary and T. Kalina. The most recent alteration to this page was made on 24 Sep 2018 by M.D. Guiry.

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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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

Verified by: 24 September 2018 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=47396

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 February 2020.

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