Anadyomene J.V.Lamouroux, 1812, nom. cons.

Holotype species: Anadyomene flabellata J.V.Lamouroux

Currently accepted name for the type species: Anadyomene stellata (Wulfen) C.Agardh

Original publication and holotype designation: Lamouroux, [J.V.F.] (1812). Extrait d'un mémoire sur la classification des Polypiers coralligènes non entièrement pierreux. Nouveaux Bulletin des Sciences, par la Société Philomathique de Paris 3: 181-188.

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Description: Thallus composed of one to several astipitate, monostromatic or polystromatic, foliaceous blades, 1-25 cm tall. Annular constrictions not present. Apical orientation maintained throughout development. Blades composed of elongate, pyriform or clavate cells, 150-350 µm diameter, 500-3000 µm long. Cells arranged in specific stellate patterns with secondary interstitial cells; loosely or tightly woven. Cells of main axes cut off from apical ends or parental cells in fans of 3-8 (or more). Rhizoid well developed from which new uprights can arise. Adventitious rhizoids abundant, arising from basal poles of older, main axial cells; often entangled resulting in pseudostipitate appearance in some species. Structural reinforcement of the blade achieved by unspecialized tenacular cells. Cell division by centripetal. Cells multinucleate, with numerous discoid chloroplasts, each with single pyrenoid surrounded with starch sheath and bisected with single thylakoid Life history with an isomorphic alternation of generations with quadriflagellate zoospores and biflagellated gametes. Gametophytes dioecious producing isogametes. Swarmers produced in either veins or interstitial cells except at base, and released through single conical opening. About 10% of blade taken up with reproductive cells. Haploid chromosome numbers of 8 and 12-15 reported for A. stellata and A. wrightii respectively. Nuclear DNA amounts of 1.5 and 2.6 pg (1C and 2C) estimated for A. stellata.

Information contributed by: J.L. Olsen & M.D. Guiry. The most recent alteration to this page was made on 2016-02-02 by M.D. Guiry.

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

Comments: Anadyomene species common and widespread throughout the tropics. Though typically a shallow-water reef-flat alga, it has been collected from depths greater than 60 m and is believed to be an important part of very deep water communities. One species, A. stellata, often present in habitats with high grazing, produces toxic material affecting fish and bacteria. Monographic studies from the tropical western Atlantic included eight species, three of which were newly described. Phylogenetic position of Anadyomene uncertain except immunological data and rRNA sequence analysis suggests that genus is sister group of Microdictyon. These genera placed by most authors in family Anadyomenaceae.

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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=33693

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 02 February 2016. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024