Lesueuria& Ducker, 1987
Holotype species: Lesueuria minderiana Woelkerling & Ducker
Original publication and holotype designation: Woelkerling, W.J. & Ducker, S.C. (1987). Lesueuria minderiana gen. et sp. nov. (Corallinaceae, Rhodophyta) from southern and western Australia. Phycologia 26: 192-204, 24 figs, 1 table.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Peña, V., Vieira, C., Braga, J.C., Aguirre, J., Rösler, A., Baele, G., De Clerck, O. & Le Gall, L. (2020). Radiation of the coralline red algae (Corallinophycidae, Rhodophyta) crown group as inferred from a multilocus time-calibrated phylogeny. Molecular Phylogenetics and Evolution 00: [1-19].
According to Peña & al. (2020: ), "Molecular information is also needed to resolve the taxonomic position of Lesueuria, an endophytic genus which shares the development of tetrasporangial conceptacle roofs (only by filaments surrounding sporangial initials), the disposition of cells lining the pore canal of tetrasporangial conceptacles (parallel to roof surface) and the arising type of gonimoblast filaments from the fusion cell of the carposporophyte (marginal) with the remaining Mastophoraceae genera. Lesueuria differs however by the presence of haustoria (Woelkerling and Ducker, 1987)." - (2 Jun 2020) - M.D. Guiry
Description: Thalli comprising endophytic vegetative filaments and emergent conceptacles. Vegetative filaments partially unconsolidated and lacking epithallial cells. Cells in contiguous filaments sometimes joined by fusions; secondary pit-connections lacking. Trichocytes unknown. Reproductive cells forming within uniporate conceptacles. Conceptacle roofs produced by overarching peripheral filaments ending in epithallial cells with rounded outer walls. Columella present; tetrasporangia in surrounding ring. Bisporangia lacking. Apical sporangial plugs absent. Separate gametangial conceptacles containing carpogonia and simple spermatangia on chamber floor.
Information contributed by: H.W. Johansen. The most recent alteration to this page was made on 2 Jun 2020 by M.D. Guiry.
Comments: Reported only on the coralline Metagoniolithon chara from western and southern Australia as deep as 8 m. Lesueuria stands apart from other genera in the Mastophoroideae because of its endophytic habit, diffuse organization of filaments, and haustoria.
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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Verification of data
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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: 28 December 2000 by M.D. Guiry
Verified by: 02 June 2020 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=39416
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 10 August 2020.