Lejolisia Bornet, 1859
Holotype species: Lejolisia mediterranea Bornet
Original publication and holotype designation: Bornet, É. (1859). Description d'un nouveau genre de Floridées des côtes de France. Annales des Sciences Naturelles, Botanique, Quatrième série 11: 88-92, pls I, II.
Request PDFDescription: Filamentous, monosiphonic, non-corticated thalli, made up of prostrate axes and erect filaments (2-15 mm high), simple or slightly and irregularly branched. The prostrate axes are attached to the substrate by unicellular rhizoids whose end expands into a digitate crampon. The erect filaments arise more or less at right angles from the cells of the prostrate axes. The cells are uninucleate (12) and contain rhodoplasts that are more or less irregularly rounded and rarely slightly elongated. Dioecious gametophytes; however, monoecious thalli and sometimes even gametophytes bearing tetrasporocysts can be found. The spermatocysts are grouped in spermatangial heads borne at the ends of short lateral twigs. The procarps are subapical on lateral branches; the subapical cell of the fertile branch bears three periaxial cells; one of which carries the carpogonial branch. Each procarp has only one helper cell which is produced by the support cell. The sterile cells associated with the procarp (the apical one, the 2 pericentral ones and a cell associated with the support cell), divide after fertilization to form the filaments of the pericarp which externally and loosely wraps the gonimoblasts; these filaments, the gonimoblasts and the carposporocysts are immersed in a thick and common mucilaginous sheath. The cystocarps are ovoid or subspherical and equipped with a "carpostomium" at the end; carposporocysts are ovoid or pyriform. There is an evident star-shaped fusion cell. The tetrasporocysts, with tetrahedral division, are terminal on short pedicels carried by the erect axes.
Information contributed by: Cormaci & al. (2023: 413).. The most recent alteration to this page was made on 2023-11-24 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: Cormaci, M., Furnari, G., Alongi, G. & Serio, D. coautrice per le Ceramieae (2023). Flora marina bentonica del Mediterraneo: Rhodophyta - Rhodymeniophycidae III: Ceramiales I (RHODOMELACEAE escluse). Bollettino Accademia Gioenia di Scienze Naturali in Catania 56(386): 81-621, 109 pls.
Comments: Widespread on warm to temperate coasts, epiphytic and in rock pools.
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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=33970
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 24 November 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024
