161,027 species and infraspecific names are in the database, 22,719 images, 62,633 bibliographic items, 473,224 distributional records.

Hypnea rissoana J.Agardh 1842

Publication details
Hypnea rissoana J.Agardh 1842: 150

Published in: Agardh, J.G. (1842). Algae maris Mediterranei et Adriatici, observationes in diagnosin specierum et dispositionem generum. pp. [i]-x, 1-164. Parisiis [Paris]: Apud Fortin, Masson et Cie.
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Publication date: 9 April 1842

Type species
The type species (lectotype) of the genus Hypnea is Hypnea musciformis (Wulfen) J.V.Lamouroux.

Status of name
This name is currently regarded as a synonym of Hypnea musciformis (Wulfen) J.V.Lamouroux

Type information
Type locality: In salinis Tergestinis et ad Venetiam; in portu Villae Francae (Agardh 1842: 150).

No synonyms are currently included in AlgaeBase.

Nomenclatural notes
Hypnea rissoana was superfluous when published and hence illegitimate, because its protologue (J. Agardh, 1842: 150) included Sphaerococcus divaricatus C. Agardh (1827: 645) (=Hypnea musciformis) (Furnari et al., 1999). "Differently from Furnari et al.%u2019s (1999: 42) interpretation], J. Agardh's H. rissoana should be considered as a legitimate new name and not as an illegitimate new species. In fact, as clearly said at the end of the treatment of H. rissoana, J. Agardh (1852: 150) realized he could not use the binomial H. divaricata for his intended "new combination" based on Sphaerococcus divaricatus C. Agardh 1827 nom. illeg. (being a later homonym of S. divaricatus C. Agardh 1817) due to the existence of Hypnea divaricata (C. Agardh) Greville, based on S. divaricatus C. Agardh 1817. Therefore, H. rissoana is treated as a nomen novum, having S. divaricatus C. Agardh 1827 nom. illeg. as replaced synonym." (Furnari, pers. comm. 9 March 2020).

General environment
This is a marine species.

No distributions recorded
No distributional records for this taxon have been recorded by AlgaeBase to date. Generally, recent national lists or extensive regional or state lists have been employed to give a general indication of distribution.

Source of current name
Cormaci, M., Furnari, G. & Alongi, G. (2020). Flora marina bentonica del Mediterraneo: Rhodophyta - Rhodymeniophycidae I. Acrosymphytales, Bonnemaisoniales, Gelidiales, Gigartinales, Gracilariales. Bollettino Accademia Gioenia di Scienze Naturali in Catania 53(38): 11-346, incl. 55 pls.

Created: 10 September 2000 by Fabio Rindi

Verified by: 09 March 2020 by M.D. Guiry

Accesses: This record has been accessed by users 716 times since it was created.

Verification of data
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Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=23931

Citing AlgaeBase
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 18 April 2021.

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