Elaterodiscus P.J.L.Dangeard, 1967

Holotype species: Elaterodiscus appendiculatus P.J.L.Dangeard

Original publication and holotype designation: Dangeard, P.[J.L.] (1967). Sur un genre nouveau de Chlorophycée marine à cycle évolutif hétéromorphe : Elaterodiscus appendiculatus nov. g., nov. sp.. Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, Série D 264: 1773-1774, 19 fig.s included in 2 pls..

Request PDF

Description: Heteromorphic life history comprising pseudoparenchymatous multicellular and unicellular thalli presumably representing gametophytic and sporophytic stages respectively. Multicellular plants forming nearly circular prostrate thalli of irregularly branched filaments when attached to hard substratum. Ordinary vegetative cells cylindrical or rounded, containing single parietal chloroplast with one pyrenoid. Cells at random sites enlarge and attain irregularly or balloon-like swollen shape; these cells with slightly reticulate chloroplast with several pyrenoids, able to penetrate into calcareous material. Similarly, unicellular plants have oblong-rounded shape when growing freely in culture; inside calcareous substratum they have a similar size and shape with several rhizoidal branches to surface of substratum. Asexual reproduction by bi- and quadriflagellate elongated, pyriform zoospores. Small cells of multicellular plants develop into sporangia of same shape and size as in vegetative condition, at maturity containing biflagellate pyriform swarmers. Unicellular plants and swollen cells of multicellular plants develop into zoosporangia with long exit tubes. Progeny of multicellular plants may be similar plants or unicellular stages while progeny of unicellular plants are multicellular thalli. Sexual reproduction unknown. Elaterodiscus known only from culture, isolated from algal material obtained at Biarritz, France, and later associated with calcareous shells, Portobello, New Zealand.

Information contributed by: R. Nielsen. The most recent alteration to this page was made on 2023-07-09 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=38308

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 09 July 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024