Holotype species: Rhipidosiphon javensis Montagne
Original publication and holotype designation: Montagne, [J.F.] C. (1842). Prodromus generum specierumque phycearum novarum, in itinere ad polum antarcticum...ab illustri Dumont d'Urville peracto collectarum, notis diagnosticis tantum huc evulgatarum, descriptionibus verò fusioribus nec non iconibus analyticis iam iamque illustrandarum. pp. [1-]16. Parisiis [Paris]: apud Gide, editorem.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as masculine.
Description: Thallus small, about 2.5 to 40 mm tall, consisting of a holdfast of fine rhizoids, monosiphonous uncorticated stipe to about 3 mm. long which may be calcified near its apex, and fan-shaped, unistratose, calcified terminal blade composed of dichotomously branched siphons. Siphons of blades do not anastomose, although their calcified sheaths may be fused, obliterating demarcations. The monosiphonous, partially calcified stipe distinguishes Rhipidosiphon from Udotea. Reproduction is by biflagellated zooids discharged terminally from uncalcified or lightly calcified, sometimes swollen zooidangia formed by extension of siphons of blade. In R. javensis, the only species for which there are data, zooidangia measure to about 3.8 mm. long and 310 µm diameter, while non-reproductive siphons are about 50-70 µm diameter. In R. javensis sexual reproduction is holocarpic (cf. Halimeda).
Information contributed by: L. Hillis. The most recent alteration to this page was made on 29 Aug 2011 by M.D. Guiry.
Comments: Geographic distribution mostly tropical; currently it is known for the Indo-Pacific extending eastward to Hawaii, and the western Atlantic. Rhipidosiphon is epilithic in sand flats and on the reef crest, and grows to at least -20 m
Numbers of names and species: There are 5 species names in the database at present, of which 3 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: 28 December 2000 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=41792
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 April 2021.