Amphiroa J.V., 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.
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.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.
Woelkerling & Harvey (2012: 119) note that effective lectotypification of the genus was made by Hamel & Lemoine (1953: 40), who designated A. tribulus as the type species. This lectotype is supported by their designation of a lectotype and epitype of Corallina tribulus. - (2 Mar 2012) - Wendy Guiry
Description: Thalli comprising crustose or peglike holdfasts and one to several erect, branched, articulated fronds. Fronds of calcified intergenicula separated by uncalcified genicula. Branching dichotomous or varied. Intergenicula of arching tiers of medullary cells that are short (5-20 um long) or long (40-130 µm long) surrounded by a photosynthetic cortex of short cells and a unistratose layer of epithallial cells. Cells in contiguous filaments often joined by secondary pit-connections; cell fusions lacking. Genicula consisting of one to several tiers of short or long uncalcified medullary cells; uncalcified cortical cells often present. Trichocyte bases round in surface view, pores central. Reproductive cells forming within lateral conceptacles on intergenicular surfaces and on crustose bases in a few species. Originating from groups or circles of initials at the periphery of the medulla. Tetrasporangial conceptacle initials forming in ring around sterile cells and sometimes also in central group. Cavity cells producing conceptacle roof and then atrophying below roof to form conceptacle chamber. Sexual conceptacles forming when group of reproductive cell initials become roofed over by peripheral filaments. Spores germinating into crustose sporelings by the Amphiroa-type of spore germination or, in a few species, by uniseriate filaments into peglike endophytic bases; in the latter growing endophytically in other coralline algae.
Information contributed by: H.W. Johansen. The most recent alteration to this page was made on 20 Jan 2017 by M.D. Guiry.
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.
Numbers of names and species: There are 186 species names in the database at present, as well as 44 infraspecific names. Of the species names, 57 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.
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: 01 January 2001 by M.D. Guiry
Verified by: 20 January 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33227
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 25 September 2018.