Nothogenia Montagne, 1843

Holotype species: Nothogenia variolosa (Montagne) Montagne

Currently accepted name for the type species: Nothogenia fastigiata (Bory) P.G.Parkinson

Original publication and holotype designation: Montagne, C. (1843). Quatrième centurie de plantes cellulaires exotiques nouvelles. Décades VII. Annales des Sciences Naturelles, Botanique, Seconde Série 20: 294-306, pl. 12.

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Description: Gametophytes and tetrasporophytes heteromorphic. Gametophytes erect, noncalcified; axes either hollow bladders, or blade-like and simple or dichotomously branched to marginally proliferous. Medulla filamentous; subcortex filamentous with rhizoids; outer cortex small-celled and compact. Dioecious; spermatangia in conceptacles. Carpogonial branches 3 to 5-celled; sterile filaments cut off of sub-carpogonial cells prior to fertilization; gonimoblast filaments produced directly from the carpogonium (Delapine & Lambert 1981) and forming the wall of the cystocarp, or from the hypogynous cell (Martin 1939) and forming the lining of the cystocarp in addition to an involucre of filaments derived from the sub-hypogynous cells. A fusion cell present at the base of the cystocarp. Carposporangia formed terminally on tufted branches projecting from the cystocarp wall; regeneration of new sporangia within old sporangial walls. Sporophytes crustose; horizontal filaments form erect filaments terminating in cruciately or decussately divided tetrasporangia.

Information contributed by: R.B. Searles. The most recent alteration to this page was made on 2010-10-05 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Huisman, J.M., Harper, J.T. & Saunders, G.W. (2004). Phylogenetic study of the Nemaliales (Rhodophyta) based on large-subunit ribosomal DNA sequences supports segregation of the Scinaiaceae fam. nov. and resurrection of Dichotomaria Lamarck. Phycological Research 52(3): 224-234.

Comments: Intertidal, restricted to South Africa, Australia, New Zealand, South America and subantarctic islands.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=34161

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 05 October 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024