Meredithia J., 1892
Lectotype species: Meredithia microphylla (J.Agardh) J.Agardh
Original publication:Agardh, J.G. (1892). Analecta algologica. Acta Universitatis Lundensis 28(6): 1-182, 3 pls.
Type designated in Schmitz, F. & Hauptfleisch, P. (1897). Gigartinaceae. In: Die natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten insbesondere den Nutzpflanzen unter Mitwirkung zahlreicher hervorragender Fachgelehrten, Teil 1, Abteilung 2. (Engler, A. & Prantl, K. Eds), pp. 352-366. Leipzig: verlag von Wilhelm Engelmann.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: 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.
Named for Louisa Ann Meredith (1812-1895), born in Pembrokeshire, Wales and who emigrated to Tasmania. According to Athanasiadis (2016: 654), the lectotype was designated by Guiry & Maggs (1985: 106); however, ING has "LT.: M. microphylla J. G. Agardh) J. G. Agardh (Kallymenia microphylla J. G. Agardh) (vide Schmitz et Hauptfleisch in Engler et Prantl, Nat. Pflanzenfam. 1(2): 365. Oct. 1896) ." - (18 Feb 2014) - M.D. Guiry
Description: Semi-peltate, auriculate blades, sometimes lobed, initially soft but becoming cartilaginous, borne ramisympodially on a terete, basally branched stipe. Perennial. Medulla filamentous, compact; stellate cells present. Cortex of subspherical cells, progressively smaller toward cuticle. Dioecious. Carpogonial branch 3-celled, borne singly on elongate, occasionally lobed supporting cell, which bears one or two subsidiary cells. Cystocarps initially embedded, becoming protuberant with age. Spermatangia superficial, in sori in center of blade. Tetrasporophyte heteromorphic, crustose. Tetrasporangia formed under short-day conditions and only at temperatures around 15ªC in a mucilaginous sorus, irregularly to regularly zonate, attached basally. Spore germination: within spore wall, resultant cell(s) producing one or more filamentous outgrowths, which become highly ramified to form a compact monostromatic disc.
Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 2 Jun 2017 by M.D. Guiry.
Comments: Subtidal. Temperate waters of the North Atlantic and Mediterranean.
Numbers of names and species: There are 14 species names in the database at present, of which 11 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: 02 June 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=37710
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 September 2018.