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.

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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 2020-09-03 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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.

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.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=106

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 03 September 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 June 2024

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