Amansia J.V., 1809
Holotype species: Amansia multifida J.V.Lamouroux
Original publication and holotype designation: Lamouroux, J.V.F. (1809). Observations sur la physiologie des algues marines, et description de cinq nouveaux genres de cette famille. Nouveau Bulletin des Sciences, par la Société Philomathique de Paris 1: 330-333, fig. 2, pl. 6.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.
Dedicated to "Saint-Amans Bulletin de la Société Philomatique" (Lamouroux 1813: 270). - (23 Jan 2011) - M.D. Guiry
Description: Thalli erect from rhizomatous or discoid holdfast, forming loriform blades with a distinct midrib and alae that are 2 cells thick; alae may have lateral veins. Blades branched from midrib or pinnately branched from margin, often with serrate margins. Alae in perennial species worn away in older parts and the strongly corticated midrib forming a stalk supporting clusters of alate branches, appearing as rosettes (Norris 1988). Branches dorsi-ventral, distal ends involute, the apical cell forming axial cells surrounded by 5 pericentral cells, pseudo-pericentral cells not formed. Pairs of pericentrals, 1 and 3 and 2 and 4, each divide longitudinally, producing determinate, unilateral, uniseriate branches growing at right angles to the axis. The 1st and 3rd branches fuse contiguously to one another as do the 2nd and 4th, the pairs of branches forming 2-layered alae on either side of the axis. Vesiculate colorless trichoblasts formed at more or less regular intervals on the dorsal side of the axis. Tetrasporangial reproductive branchlets determinate, develop endogenously or adventitiously developed, usually on blade margins. Two tetrasporangia in each fertile segment. Gametangia in positions of trichoblasts on marginal determinate bladelets; procarpial branchlets with multicellular stalks, spermatangial branchlets with monosiphonous stalks.
Information contributed by: R.E. Norris. The most recent alteration to this page was made on 23 Jan 2011 by M.D. Guiry.
Comments: Tropical and subtropical; tide pools or on low intertidal to subtidal (to 59 m, Aegegian 1985) rocks and reefs.
Numbers of names and species: There are 42 species names in the database at present, as well as 1 infraspecific names. Of the species names, 15 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..
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.
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.
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
Verified by: 23 January 2011 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=35584
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 September 2018.