Rhodoptilum J., 1956
Holotype species: Rhodoptilum plumosum (Harvey & Bailey) Kylin
Original publication and holotype designation: Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.
Description: Thallus erect, sympodially developed and bilaterally organized, distichously and irregularly branched, short and long branches interspersed. Main and secondary indeterminate axes distinctly flattened and marginally producing determinate pseudolateral branch systems from each polysiphonous segment. Pseudolaterals pigmented, monosiphonous throughout, simple to dichotomously branched, often deciduous on major axes. Axial cells surrounded by 5 periaxials which are quickly corticated by short descending rhizoidal filaments, collectively forming a thick cortex. Dioecious, spermatangia formed in several successive whorled series on monosiphonous stalks of pseudolaterals, overall forming organized conical to linear-lanceolate stichidia, often with sterile tips. Procarps formed on periaxial cells directly, one per node, replacing pseudolaterals. Procarps consist of a 4-celled carpogonial branch and 2 sterile groups of cells borne on the supporting cell. After fertilization, monopodial gonimoblast filaments with terminal, then lateral carposporangia singly or in short chains, form from a fusion cell complex including the auxiliary cell. Carposporophytes terminal on short indeterminate branches, surrounded by large, corticated pericarps with prominent necks. Four to six tetrahedral sporangia produced in successive whorls, forming linear-lanceolate stichidia on lower portions of pseudolaterals or replacing them. Tetrasporangia only partially enclosed by cover cells at maturity .
Information contributed by: C.W. Schneider. The most recent alteration to this page was made on 6 Oct 2010 by M.D. Guiry.
Comments: Subtidal from the Pacific coast of North America and Japan.
Numbers of names and species: There are 2 species names in the database at present, of which 1 has 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.
Agardh, J.G. (1890). Till algernes systematik. Nya bidrag. (Sjette afdelningen.). Lunds Universitets Års-Skrift, Andra Afdelningen, Kongl. Fysiografiska Sällskapets i Lund Handlingar 26(3): 1-125, III pls.
Falkenberg, P. (1901). Die Rhodomelaceen des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. Fauna und Flora des Golfes von Neapel, Monographie 26. pp. i-xvi, 1-754, 10 figs, 24 pls. Berlin.
Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.
Millar, A.J.K. (1996). Dasya roslyniae sp. nov. (Dasyaceae, Rhodophyta), with a discussion on generic distinctions among Dasya, Eupogodon, Rhodoptilum, and Pogonophorella. Journal of Phycology 32: 145-157, 32 figs.
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=40463
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 October 2020.