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.

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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 2010-09-24 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.

Comments: Lower intertidal and subtidal; southeast Africa, Australia, Indonesia, Japan, and The Philippines.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=36775

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 24 September 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024