Rhipiliopsis A.& E.S. , 1911
Holotype species: Rhipiliopsis peltata (J.Agardh) A.Gepp & E.Gepp
Original publication and holotype designation: Gepp, A. & Gepp, E.S. (1911). The Codiaceae of the Siboga Expedition including a monograph of Flabellarieae and Udoteae Siboga-Expeditie Monographie LXII. pp. 1-150, 22 pls. Leiden: E.J. Brill.
Taxonomic status: currently recognized as a distinct genus.
Description: Thallus non-calcified, from less than 5 mm to over 7 cm tall, consisting of blade and stalk system arising from prostrate rhizome or from digitate processes embedded in substratum. Fronds monostromatic or polystromatic, irregularly lanceolate or regularly to excentrically peltate, with siphons dichotomously branched and generally equally constricted above dichotomy. In the 2 species with thickest blades a somewhat differentiated cortex develops on upper and lower surfaces of fronds. Scattered spines occur on blade siphons of two species. Stalks are mono- or multisiphonous; monosiphonous stalks are smooth, or variously covered with spinous processes. Constituent siphons cohere at scattered and isolated points by circular rings of wall thickening at tips of lateral papillae or foreshortened blade-siphon dichotomies. Heteroplastic, except possibly for Johnson-Sea-Linkia, with ovoid chloroplasts and larger reniform amyloplasts. Reproduction is unreported in all but type species which has been illustrated with single ovoid to pyriform, stalked zooidangia borne singly and laterally on medullary siphons.
Information contributed by: J. Kraft. The most recent alteration to this page was made on 29 Aug 2011 by M.D. Guiry.
Comments: Geographic distribution predominantly tropical, with most species known only from type and limited ranges. Two species are endemic to temperate coasts of southern Australia. Vertical range is low intertidal to -153 m. It is suggested here that Johnson-Sea-Linkia be placed in synonymy with Rhipiliopsis, at least provisionally. A monotypic genus from the Bahamas, its only known difference is an apparent lack of amyloplasts, a feature conceivably related to its deep-water habitat (ca. -60 to -153 m.)
Numbers of names and species: There are 20 species names in the database at present, of which 19 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):
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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
Verified by: 29 August 2011 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=36028
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 April 2021.