Euthora J.Agardh, 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.

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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 2017-01-23 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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.

Comments: Cool temperate North Atlantic and North Pacific Oceans; Arctic Ocean.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=42637

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 23 January 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 16 April 2024