Rytiphlaea C.Agardh, 1817
Lectotype species: Rytiphlaea purpurea C.Agardh
Publication details: C.Agardh, 1817: xxv
Currently accepted name for the type species: Rytiphlaea tinctoria (Clemente) C.Agardh
Original publication: Agardh, C.A. (1817). Synopsis algarum Scandinaviae, adjecta dispositione universali algarum. pp. [i]-xl, [1]-135. Lundae [Lund]: Ex officina Berlingiana.
Request PDFType designated in: Athanasiadis, A. (2016). Phycologia Europaea Rhodophyta Vol. II. pp. [2], 763-1504. Thessaloniki: Published and distributed by the author.
Description: Dorsiventral polysiphonous thalli, up to ~20 cm high; axis and branches flattened, corticated, with circinate tips, branches usually abaxially secund. 5 pericentral cells, pseudoparenchymatous tissue expanding on two opposite sides to form flattened thalli (Gayral 1966). Polysiphonous branches endogenously produced; trichoblasts uncommon, vesiculate if emergent, in a median dorsal row. Tetrasporangial stichidia on ultimate branch margins, 2 in each segment forming two longitudinal dorsal rows. Male capitula and procarps replacing trichoblasts, dorsal on small branchlets formed on margin of ultimate branches. Cystocarps spheroidal, sessile on branchlet, 1- several on same branchlet.
Information contributed by: R.E. Norris. The most recent alteration to this page was made on 2019-07-09 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: Phillips, L.E. & De Clerck, O. (2005). The terete and sub-terete members of the red algal tribe Amansieae (Ceramiales, Rhodomelaceae). Cryptogamie Algologie 26: 5-33, 26 figs.
Comments: Upper sublittoral, eastern north Atlantic from Great Britain to Mauritania, Mediterranean and Aegaen Seas. The second species, R. australis, was included as a synonym of Lophurella patula by Pujals (1963) although Papenfuss (1964) listed it as a species of Rytiphloea with uncertain status; it occurs in the Falkland Islands.
Nomenclatural note
The ING entry (January 2016) is incorrect "LT.: R. tinctoria (Clemente) C. Agardh (Fucus tinctorius Clemente) (vide F. Schmitz, Flora 72: 447. 20 Dec 1889). R. tinctoria as slected by Schmitz was not an included name in the original description and thus cannot serve as lectotype (Athanasiadis 2016: 1386). The original spelling used by C.Agardh (1717: xxv) is Rytiphlaea and a change to Rytiphloea would require conservation. Agardh included four species: Complanata, Pinastroides, Purpurea and Lineata. The original orthography chosen by J.Agardh was "Rytiphlaea" and a change from Rytiphlaea to Rytiphloea and a change in gender (see Athanasiadis 2016: 1386, note 1), if warranted, should be made by formally proposing conservation of the altered name. - (19 January 2017) - M.D. Guiry
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Contributors
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=42700
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 09 July 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 09 June 2025
