Rhodophyllis Kützing, 1847, nom. cons.
Holotype species: Rhodophyllis bifida (J.V.Lamouroux) Kützing
Original publication and holotype designation: Kützing, F.T. (1847). Diagnosen und Bemerkungen zu neuen oder kritischen Algen. Botanische Zeitung 5: 1-5, 22-25, 33-38, 52-55, 164-167, 177-180, 193-198, 219-223.
Taxonomic status: currently recognized as a distinct genus.
Gender: This genus name is currently treated as feminine.
Most recent taxonomic treatment adopted: Woelkerling, W.J., Furnari, G., Cormaci, M. & McNeill, J. (2020). A nomenclatural analysis of the genus name Rhodophyllis (Cystocloniaceae, Rhodophyta). Notulae Algarum 155: 1-9, 4 figs.
Woelkerling & al. (2020: 3) note "Although almost always recognized as a distinct genus of Rhodophyta since first described, Rhodophyllis Kützing (Kützing 1847: 23) has had a complex nomenclatural history. Rhodophyllis was formally proposed for conservation against Bifida Stackhouse (1809: 95, 97) by Børgesen & al. (1909: 324) without remarks or mention of types but with the approval of 33 additional phycologists (listed on p. 325). Earlier, without mention of types, Trevisan (1845: 63 listed Bifida as a synonym of Rhodymenia, whereas Le Jolis (1856: 76) treated Bifida as a synonym of Rhodophyllis as did De Toni (1897: 339). By contrast, Kuntze (1891: 886; 1898: 397) treated Rhodophyllis as a synonym of Bifida. The Børgesen & al. (1909) proposal was accepted on 10 May 1910 at the International Botanical Congress in Brussels [ICN Art.14, Note 4(b); Farlow & Atkinson 1910], and included in the Brussels Rules (Briquet 1912: 77), well before the introduction in 1930 (see above) of the type method of determining the application of names." - (3 Sep 2020) - M.D. Guiry
Description: Plants of some species reach 30 cm in length. flat, complanate, and irregularly to alternately pinnately branched, and generally grow from a small discoid holdfast. Axial filaments are prominent or obscure in cross sections, the medulla consisting of a very narrow to rudimentary filamentous region surrounded by a 2-4-celled cortex of isodiametric cells, the outer layer in most species forming distinct rosettes around larger cells of the subsurface layer. Auxiliary cells stain darkly before diploidization, and become surrounded toward the thallus interior by a distinctive small-celled "nutritive" tissue. Cystocarps are protuberant and consist of a pericarp with or without an ostiole surrounding chains of carposporangia borne on a central fusion cell along with scattered sterile filaments. Because the type species may differ in some respects (lack of rosette cells; lack of basal nutritive tissue) from Australian species that have the above characteristics (Min-Thein and Womersley 1976), the genus is in need of revision based on a world monograph.
Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 3 Sep 2020 by M.D. Guiry.
Comments: Distribution: The type species occurs along the European Atlantic coast from Norway to Morocco, and in the Mediterranean Sea (Dixon and Irvine, 1977). With the exception of a Japanese and an Aleutian Island representative (Wynne 1981), the rest are confined to the southern Hemisphere, particularly to Australia and New Zealand (7 spp.). Other species are recorded from Brazil, Peru, and South Africa.
Numbers of names and species: There are 38 species names in the database at present, as well as 11 infraspecific names. Of the species names, 16 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
Verified by: 03 September 2020 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=106
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 28 September 2021.