148,082 species and infraspecific names are in the database, 20,224 images, 56,770 bibliographic items, 359,987 distributional records.

Pterothamnion Nägeli, 1855

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Ceramiales
Suborder Ceramiineae
Family Ceramiaceae
Subfamily Ceramioideae
Tribe Pterothamnieae

Holotype species: Pterothamnion plumula (J.Ellis) Nägeli

Original publication and holotype designation: Nägeli, C. & Cramer, C. (1855). Pflanzenphysiologische Untersuchungen. Heft 1. pp. [i-vi], [1]-120, pls I-X. Zürich: bei Fredrich Schultness.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Athanasiadis, A. (1996). Morphology and classification of the Ceramioideae (Rhodophyta) based on phylogenetic principles. Opera Botanica 127: 1-221.

Numbers of names and species: There are 48 species (and infraspecific) names in the database at present, of which 28 have been flagged as currently accepted taxonomically.

Names: ('C' indicates a name that is currently 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):

Pterothamnion abietinum (Reinsch) Athanasiadis S 
Pterothamnion aciculare (Wollaston) Athanasiadis & Kraft C 
Pterothamnion americanum (Harvey) Nägeli S 
Pterothamnion antarcticum (Kylin) R.L.Moe & P.C.Silva C 
Pterothamnion capense (Stegenga) Athanasiadis & Kraft C 
Pterothamnion confusum (J.Agardh) Athanasiadis C 
Pterothamnion crispum (Ducluzeau) Nägeli C 
Pterothamnion crispum var. bebbii (Reinsch) Mazoyer S 
Pterothamnion cristatum (Kützing) Nägeli S 
Pterothamnion cuspidatum (Wollaston) Athanasiadis & Kraft C 
Pterothamnion flexile (Wollaston) Athanasiadis & Kraft C 
Pterothamnion floccosum (O.F.Müller) Nägeli S 
Pterothamnion francisianum (Wollaston) Athanasiadis & Kraft C 
Pterothamnion heteromorphum (J.Agardh) Athanasiadis & Kraft C 
Pterothamnion horridum (Tokida & Inaba) Athanasiadis & Kraft C 
Pterothamnion intermedium (Tokida) Athanasiadis & Kraft C 
Pterothamnion lapponicum (Ruprecht) Nägeli S 
Pterothamnion latiramosum Athanasiadis C 
Pterothamnion lindaueri (G.Feldmann) Athanasiadis & Kraft S 
Pterothamnion macropterum (Meneghini ex Kützing) Nägeli U 
Pterothamnion manifestum (Wollaston) Athanasiadis & Kraft C 
Pterothamnion minutissimum (Levring) R.W.Ricker C 
Pterothamnion myurum (Suhr) J.Agardh S 
Pterothamnion nodiferum (J.Agardh) Athanasiadis & Kraft C 
Pterothamnion orbignianum (Montagne) Nägeli C 
Pterothamnion pectinatum (Kylin) Athanasiadis & Kraft C 
Pterothamnion plumula var. bebbii (Reinsch) Cormaci & G.Furnari S 
Pterothamnion plumula var. refractum (Kützing) Cormachi & Furnari S 
Pterothamnion plumula (J.Ellis) Nägeli C - type
Pterothamnion plumula subsp. haplokladion Athanasiadis C 
Pterothamnion plumula subsp. verticillatum Athanasiadis C 
Pterothamnion polyacanthum (Kützing) Nägeli C 
Pterothamnion polysporum (Itono) Athanasiadis & Kraft C 
Pterothamnion ptilota (J.D.Hooker & Harvey) Nägeli S 
Pterothamnion pusillum (Ruprecht) Nägeli S 
Pterothamnion pylaisaei (Montagne) Nägeli S 
Pterothamnion ramulentum (Wollaston) Athanasiadis & Kraft C 
Pterothamnion recurvatum (Wollaston) Athanasiadis & Kraft C 
Pterothamnion refractum (Kützing) Nägeli S 
Pterothamnion reversum (Setchell & N.L.Gardner) Athanasiadis & Kraft S 
Pterothamnion simile (J.D.Hooker & Harvey) Nägeli C 
Pterothamnion spinescens (Strömfelt) Athanasiadis C 
Pterothamnion squarrulosum (Harvey) Athanasiadis & Kraft C 
Pterothamnion subnudum (Ruprecht) Nägeli S 
Pterothamnion tepocense (E.Y.Dawson) Athanasiadis & Kraft C 
Pterothamnion ternifolium (J.D.Hooker & Harvey) Nägeli S 
Pterothamnion villosum (Kylin) Athanasiadis & Kraft C 
Pterothamnion yezoense (Inagaki) Athanasiadis & Kraft C 

References
Choi, H.-G., Kraft, G.T., Kim, H.-S., Guiry, M.D. & Saunders, G.W. (2008). Phylogenetic relationships among lineages of the Ceramiaceae (Ceramiales, Rhodophyta) based on nuclear small subunit rDNA sequence data. Journal of Phycology 44: 1033-1048.

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.

Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.

Verification of data
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Created: 30 December 2000 by M.D. Guiry

Verified by: 25 January 2017 by M.D. Guiry

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Citing AlgaeBase
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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 28 April 2017.

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