Leptosiphonia Kylin, 1956
Holotype species: Leptosiphonia schousboei (Thuret) Kylin
Original publication and holotype designation: Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.
Description: Polysiphonous thalli, proximally prostrate, but not forming a truly dorsiventral orientation, with ascending branch ends. Radially oriented cylindrical branches with branched trichoblasts on most distal segments in 1/4 spiral. (4-) 8-17 pericentral cells with some proximal cortication usually present. Polysiphonous branches borne on basal cells of trichoblast. Reproductive structures distal on unspecialized branches. Cystocarps ovoid, ostiolate and on short stalks. Male capitula cylindrical, replacing trichoblasts on branch tips. Tetrasporangia two per segment, in two rows on diametrally opposite sides of branch.
Information contributed by: Amended by Savoie & Saunders (2019: 12) with addition of pericentral numbers fide Alicia Boraso.. The most recent alteration to this page was made on 2021-06-11 by M.D. Guiry.
Taxonomic status: This name is of an entity that is currently accepted taxonomically.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Díaz-Tapia, P., Maggs, C.A., West, J.A. & Verbruggen, H. (2017). Analysis of chloroplast genomes and a supermatrix inform reclassification of the Rhodomelaceae (Rhodophyta). Journal of Phycology 53(5): 920-937, 2 figs.
Comments: Amended description (Savoie & Saunders, 2019: 12). Leptosiphonia is identical to some Polysiphonia species except for the production of 2 tetrasporangia per fertile segment.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.
Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=38070
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 11 June 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 30 November 2023