Euthora J., 1847
Holotype species: Euthora cristata (C.Agardh) J.Agardh
Original publication and holotype designation: Agardh, J.G. (1847). Nya alger från Mexico. Öfversigt af Kongl. Vetenskaps-Adademiens Förhandlingar, Stockholm 4: 5-17.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Harper, J.T. & Saunders, G.W. (2002). Using molecular data to resolve the taxonomic limits of the genera Callophyllis, Euthora and Pugetia (Kallymeniaceae, Rhodophyta). Phycological Research 50(4): 275-282.
Seven species, some provisionally, originally included. Euthors cristata was selected as type by Schmitz (1889: 441) but ING indicates that Agardh selected the same species as type. - (23 Jan 2017) - M.D. Guiry
Description: Flat, narrow, subdichotomously branched to five or more orders. Ultimate branches irregularly alternate to pinnate, terminating in acute apices; narrow marginal proliferations sometimes present. Medulla of large isodiametric cells mixed with small-celled filaments derived from primary medullary and inner cortical cells. Cortical cells isodiametric, progressively smaller toward cuticle. Dioecious. A single 3-celled carpogonial branch borne on supporting cell, usually with one subsidiary cell. Supporting cell serving as auxiliary cell. Carposporangia in groups, separated by gonimoblast filaments. Cystocarp protuberant, with poorly developed carpostome. Spermatangia superficial. Tetrasporophyte isomorphic. Tetrasporangia cruciate or irregular, scattered in cortex.
Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 23 Jan 2017 by M.D. Guiry.
Comments: Cool temperate North Atlantic and North Pacific Oceans; Arctic Ocean.
Numbers of names and species: There are 8 species names in the database at present, as well as 3 infraspecific names. Of the species names, 3 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.
Saunders, G.W., Huisman, J.M., Vergés, A., Kraft, G.T. & Le Gall, L. (2017). Phylogenetic analyses support recognition of ten new genera, ten new species and 16 new combinations in the family Kallymeniaceae (Gigartinales, Rhodophyta). Cryptogamie Algologie 38(2): 79-132, 126 figs.
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: 28 December 2000 by M.D. Guiry
Verified by: 23 January 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42637
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 19 March 2019.