Amansia J.V.Lamouroux, 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.

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Description: Thallus erect, dorsiventral, with loriform blades that have distinct or indistinct midribs and marginal serrations. Branching from the midrib or pinnately from the margins, occasionally adventitiously from secondary cortication. Apices involute. Structure uniaxial, the central axis ringed by 5 pericentral cells, the first-formed ventral and the last 2-formed dorsal, the dorsal pericentral cells remaining undivided or subsequently each cutting off a lateral pseudopericentral cell. A single trichoblast often formed on the dorsal side of segments. First- to fourth-formed pericentral cells dividing longitudinally and developing into lateral uniseriate branches that remain contiguous, these determinate and forming lateral alae 2 cells thick on either side of the midrib. Serrations formed by endogenous branchlets or renewed growth of marginal cells. In some species the midrib becoming thickened by divisions of the pericentral cells. Reproductive structures arising on endogenous branchlets or adventitious branchlets formed from the margins or surface of the blade. Tetrasporangia formed in intercalary series on determinate endogenously formed lateral branchlets.

Information contributed by: J.M. Huisman (2018).. The most recent alteration to this page was made on 2018-10-08 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. (2018). Algae of Australia. Marine benthic algae of north-western Australia. 2. Red algae. pp. [i]-xii, 1-672, 189 figs. Canberra & Melbourne: ABRS & CSIRO Publishing.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 October 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 02 December 2023

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