Melanamansia R.E.Norris, 1988
Holotype species: Melanamansia seagriefii R.E.Norris
Original publication and holotype designation: Norris, R.E. (1988). Structure and reproduction of Amansia and Melanamansia gen nov. (Rhodophyta, Rhodomelaceae) on the southeastern African coast. Journal of Phycology 24: 209-223, 35 figs.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Description: Erect thallus with 2-layered alae and a dorsi-ventral axis. Axial row of cells surrounded by 5 pericentral cells. Alae formed by lateral adhesion of distichous, uniseriate branches growing from pericentral cells. Pericentrals 1 and 3 and pericentrals 2 and 4 develop the two parts of the ala. One and 2 each form a single pseudopericentral cell (Norris 1988). Distal ends of branches are involute, vesiculate trichoblasts are irregularly formed on the dorsal side of axis. Older parts of thalli with corticated axes, but alae remain uncorticated. Alae usually with irregular to regularly serrate margins, often worn away in older regions leaving the corticated midrib as a stalk upon which rosettes of blades may form in some species (Norris 1988).
Gametangial branchlets form in positions similar to the tetrasporangial branchlets; procarps and spermatangial capitula occur on the dorsal side of branchlets, cystocarps with multicellular stalks and spermatangial capitula with unicellular stalks.
Tetrasporangia, 2 in each fertile segment, develop in endogenously formed determinate branchlets on blade margins or in stichidia that are adventitious on blade margins or surfaces.
Information contributed by: R.E. Norris. The most recent alteration to this page was made on 24 Sep 2010 by M.D. Guiry.
Comments: Lower intertidal and subtidal; southeast Africa, Australia, Indonesia, Japan, and The Philippines.
Numbers of names and species: There are 12 species names in the database at present.
Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Click here to also show infraspecific names in the list below.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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.
Created: 28 December 2000 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=36775
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 22 March 2019.