Amphiroa J.V.Lamouroux, 1812

Lectotype species: Amphiroa tribulus (J.Ellis & Solander) J.V.Lamouroux

Original publication: 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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Type designated in: Hamel, G. & Lemoine, Mme P. [=M.] (1953). Corallinacées de France et d'Afrique du Nord. Archives du Museum National d'Histoire Naturelle (Paris), série 7 1: 15-136.

Description: Thallus usually erect, occasionally entangled or repent; branches of alternating decalcified genicula and calcified intergenicula, branching variously dichotomous, trichotomous, irregular or clustered (some species with adventitious branches); branch segments terete to compressed or flattened. Structure pseudoparenchymatous, strictly monomerous, with a central filamentous core composed of arching tiers of cells and a more peripheral region where core filaments or their derivatives curve outwards and terminate in epithallial cells at the thallus surface. Cells of adjacent filaments linked by secondary pit connections; cell fusions absent. Gametangia and sporangia formed in uniporate conceptacles situated on conceptacle chamber floors. Spermatangia, where known, terminating short unbranched filaments. Carpogonial branches, where known, 2-celled. Carposporophytes, where known, formed in female conceptacles after fertilisation, consisting of a central fusion cell and short filaments with terminal carposporangia. Tetrasporangia/bisporangia with zonately arranged spores; sporangia formed peripheral to or interspersed among sterile often degenerate filaments that originally contributed to conceptacle roof formation. or form a central columella. Life history with isomorphic gametophytes and tetrasporophytes.

Information contributed by: R.A. Townsend & J.M. Huisman (2018).. The most recent alteration to this page was made on 2018-09-25 by M.D. Guiry.

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

Most recent taxonomic treatment adopted: Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.

Comments: Amphiroa is a large genus widespread in tropical and subtropical regions with a variety of morphological types from a few millimeters high to as much as 30 cm. Intergenicula may be terete or flat, and sometimes have midribs and wings. Studies in Belize reveal that fronds are protected from herbivory (by fishes) near sea fans (Gorgonia), fire coral colonies (Millepora), and the herbivore-resistant brown algae Stypopodium.

Named for Amphiro, one of the Océanides (nymphs of the sea, daughters of Oceanus and Tethys), mentioned by Ancient Greek poet Hesiod in his epic poem Theogony, which presents a genealogy of the Greek gods [“Océanide suivant Hésiode” fide J.V.Lamouroux, Hist. Polyp. Corall. 294 (1816)].

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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=33227

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 25 September 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 04 October 2022

 
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