161,464 species and infraspecific names are in the database, 22,723 images, 62,912 bibliographic items, 473,550 distributional records.

Polysiphonia tenella (C.Agardh) Moris & De Notaris 1839

Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Family Rhodomelaceae
Tribe Polysiphonieae
Genus Polysiphonia


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Polysiphonia tenella (C.Agardh) Moris & De Notaris
Tanzania; detail of apex of creeping frond. Eurico Oliveira. © Eurico Oliveira (euricodo@usp.br).

Polysiphonia tenella (C.Agardh) Moris & De Notaris
Portugal, Áncora, 2003, microscope. Ignacio Bárbara. © Ignacio Bárbara (barbara@udc.es).

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Achnanthes similis McCall

Herposiphonia tenella (C.Agardh) Ambronn Masthead Island, Queensland
© J.M. Huisman

Publication details
Polysiphonia tenella (C.Agardh) Moris & De Notaris 1839: 265

Published in: Moris, G. & De Notaris, G. (1839). Florula caprariae sive enumeratio plantarum in insula Capraria vel sponte nascentium vel ad utilitatem latius excultarum. Memorie della Reale Accademia delle Scienze di Torino, ser. 2 : 59-300, pls I-VI.

Type species
The type species (holotype) of the genus Polysiphonia is Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville.

Status of name
This name is currently regarded as a synonym of Herposiphonia tenella (C.Agardh) Ambronn

Hutchinsia tenella C.Agardh

Type information
Type locality: Sicily (Silva & al. 1996: 499).

Origin of species name
Adjective (Latin), delicate (Stearn 1985).

No synonyms are currently included in AlgaeBase.

Taxonomic notes
According to Diaz-Tapia & Barbára (2013:338), this is a synonym of Herposiphonia secunda f. tenella. - (24 Jan 2014) - Wendy Guiry

General environment
This is a marine species.

Detailed distribution with sources (Click to Load)

Source of current name
Ambronn, H. (1880). Über einige Fälle von Bilateralität bei den Florideen. Botanische Zeitung 38: 161-174, 177-185, 193-200, 209-216, 225-233, Plates III, IV.

Key references
Díaz-Tapia, P. & Bárbara, I. (2013). Seaweeds from sand-covered rocks of the Atlantic Iberian Peninsula. Part. 1. The Rhodomelaceae (Ceramiales, Rhodophyta). Cryptogamie Algologie 34(4): 325-422.

Created: 17 November 1998 by M.D. Guiry

Verified by: 26 January 2021 by M.D. Guiry

Accesses: This record has been accessed by users 519 times since it was created.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Schneider, C.W. & Searles, R.B. (1997). Notes on the marine algae of the Bermudas. 2. Some Rhodophyta, including Polysiphonia tongatensis and a discussion on the Herposiphonia secunda/tenella complex. Cryptogamie, Algologie 18: 187-210, 19 figs.

Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=13255

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 15 May 2021.

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