Asteronema Delépine & Asensi, 1975, nom. cons.
Holotype species: Asteronema australe Delépine & Asensi
Original publication and holotype designation: Delépine, R. & Asensi, A. (1975). Asteronema nov. gen. nouveau genre de Phéophycée australe. Bulletin de la Société Botanique de France 122: 295-304, 3 pls.
Description: The thallus organization is heterotrichous. The erect filaments are uniseriate with coalescent bases from which rhizoidal filaments develop. Branching is sparse and sometimes unilateral. Longitudinal growth by apical and intercalary divisions. The characteristic feature of the genus is the stellate arrangement of the chloroplasts. The pyrenoid is a omposite structure formed by fusion of terminal pyrenoidal elements on the individual arms of the stellate chloroplast. The pyrenoid has an axial position in the cell, while the chloroplast arms are parietal. Both unilocular and plurilocular sporangia are formed terminally on 1-2 celled laterals. Monospores are formed in A. australe (Delépine and Asensi 1975).
Information contributed by: P.M. Pedersen. The most recent alteration to this page was made on 2019-11-01 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 neuter.
Most recent taxonomic treatment adopted: Silberfeld, T., Rousseau, F. & Reviers, B. de (2014). An updated classification of brown algae (Ochrophyta, Phaeophyceae). Cryptogamie Algologie 35(2): 117-156, 1 fig., 1 table.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=42523
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 01 November 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 28 November 2022