Fauchea& Bory, 1846
Holotype species: Fauchea repens (C.Agardh) Montagne & Bory
Currently accepted name for the type species: Gloiocladia repens (C.Agardh) N.Sánchez & Rodríguez-Prieto
Original publication and holotype designation: Montagne, [J.F.]C. (1846). Flore d'Algérie. Ordo I. Phyceae Fries. In: Exploration scientifique de l'Algérie pendant les années 1840, 1841, 1842...Sciences physiques. Botanique. Cryptogamie. (Durieu De Maisonneuve, M.C. Eds) Vol. 1, pp. 1-197. Paris: Imprimerie Royale, publiée par ordre du Gouvernement et avec le concours d'une Commission Académique.
Taxonomic status: currently regarded as a synonym of Gloiocladia.
Most recent taxonomic treatment adopted: Saunders, G.W., Strachan, I.M. & Kraft, G.T. (1999). The families of the order Rhodymeniales (Rhodophyta): a molecular-systematic investigation with a description of Faucheaceae fam. nov. Phycologia 38: 23-40.
Monotypic when first introduced. - (24 Jan 2017) - M.D. Guiry
Description: Thallus with a discoid holdfast and erect, solid, flattened, flabellate, dichotomous or irregularly branched, lubricous fronds. Construction multiaxial, cortical cells small, in branched, anticlinal rows, medulla of large, axially elongated cells. Cortical cells sometimes proliferating to form a network ramifying between the medullary cells or penetrating them. Gametangial plants dioecious; spermatangial sori superficial, spermatangia formed on terminal cortical cells.Procarpic, carpogonial branches in cortex, 3-celled, borne on a large multinucleate supporting cell with a single, 2-celled auxiliary cell branch which sometimes bears a 2-celled sterile branch; gonimoblast developing outwards from a small fusion cell, most cells forming carposporangia. Cystocarps ostiolate, marginal or scattered, sometimes coronate, protruding outwards, tela arachnoidea present. Tetrasporangia small, in scattered, nemathecial sori. Spores regularly cruciately arranged.
Information kindly contributed by M.D. Guiry but may now be outdated.
Comments: Sparling (1961) carried out a preliminary study of the life history of Fauchea laciniata from the Pacific coast of North America in culture, finding that carpospores from field-collected plants formed viable tetrasporophytes. However, West and Norris (1966) found that similar tetraspores gave rise to further tetrasporophytes in culture. Nevertheless, the life history, to judge from the frequent occurrence of isomorphic tetrasporangial and cystocarpic plants in the wild (Hawkes and Scagel 1986), is likely generally to be of the ‘Polysiphonia-type.’ Species of Fauchea are usually subtidal, although F. laciniata occasionally occurs in the low intertidal (Hawkes and Scagel 1986). Dawson and Neushul (1966) noted that exposed-coast forms of F. laciniata, previously known as F. pygmaea (Setchell 1912), maintain their growth form in culture, suggesting that the thallus morphology may be genetically rather than environmentally based. Abbott and Hollenberg (1976) include these forms in F. laciniata. The two species of American Pacific coast Fauchea species (F. fryeana and F. laciniata) need further studies to establish if they are congeneric. Fauchea and Gloiocladia are closely related and very similar in features of structure and reproduction; Fauchea species form tetrasporangia in nemathecoid sori whereas in Gloiocladia they are formed sunken the the cortex in relatively unmodified sori.Fauchea species are mainly found in warm-temperate, subtropical and tropical waters, although F. repens is found in the western Mediterranean and the Atlantic coasts southern Spain and Algeria (Feldmann 1942), F. laciniata and F. fryeana are found on the Pacific coast of North America north to Alaska and British Columbia, respectively (Hawkes and Scagel 1986)
Numbers of names and species: There are 29 species names in the database at present, as well as 3 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):
Click here to also show infraspecific names in the list below.
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: 24 January 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33251
Please cite this record as:
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 22 February 2020.