WoRMS taxon details

Polysiphonieae Schmitz, 1889

393561  (urn:lsid:marinespecies.org:taxname:393561)

accepted
Tribe
Genus Alleynea Womersley, 2003
Genus Chiracanthia Falkenberg, 1897
Genus Ctenosiphonia Falkenberg, 1897
Genus Diplocladia Kylin, 1956
Genus Echinothamnion Kylin, 1956
Genus Enelittosiphonia Segi, 1949
Genus Epizonaria Díaz-Tapia & Maggs, 2017
Genus Eutrichosiphonia A.M.Savoie & G.W.Saunders, 2018
Genus Kapraunia A.M.Savoie & G.W.Saunders, 2018
Genus Lampisiphonia H.-G.Choi, Diaz Tapia & Bárbara, 2013
Genus Lophurella F.Schmitz, 1897
Genus Neosiphonia M.-S.Kim & I.K.Lee, 1999
  » Species Neosiphonia apiculata (Hollenberg) Masuda & Kogame, 2003 accepted as Melanothamnus apiculatus (Hollenberg) Díaz- Tapia & Maggs, 2017
  » Species Neosiphonia bajacali (Hollenberg) Mamoozadeh & Freshwater, 2011 accepted as Melanothamnus bajacali (Hollenberg) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia baliana D.E.Bustamante, B.Y.Won & T.O.Cho, 2013 accepted as Melanothamnus balianus (D.E.Bustamante, B.Y.Won & T.O.Cho) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia beaudettei (Hollenberg) M.-S.Kim & I.A.Abbott, 2006 accepted as Polysiphonia beaudettei Hollenberg, 1961
  » Species Neosiphonia cheloniae (Hollenberg & J.N.Norris) J.N.Norris, 2014 accepted as Melanothamnus cheloniae (Hollenberg & J.N.Norris) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia collabens (C.Agardh) Díaz-Tapia & Bárbara, 2013 accepted as Melanothamnus collabens (C.Agardh) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia concinna (Hollenberg) J.N.Norris, 2014 accepted as Melanothamnus concinnus (Hollenberg) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia confusa (Hollenberg) J.N.Norris, 2014 accepted as Eutrichosiphonia confusa (Hollenberg) A.M.Savoie & G.W.Saunders, 2019
  » Species Neosiphonia decumbens (T.Segi) M.-S.Kim & I.K.Lee, 1999 accepted as Melanothamnus decumbens (T.Segi) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia eastwoodiae (Setchell & N.L.Gardner) S.-D.Xiang, 2004 accepted as Melanothamnus eastwoodiae (Setchell & N.L.Gardner) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia echinata (Harvey) N.Mamoozadeh & D.W.Freshwater, 2011 accepted as Acanthosiphonia echinata (Harvey) A.M.Savoie & G.W.Saunders, 2019
  » Species Neosiphonia elongata (Hudson) Xiang Si-duan, 2004 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019
  » Species Neosiphonia elongella (Harvey) M.S.Kim & I.K.Lee, 1999 accepted as Carradoriella elongella (Harvey) A.M.Savoie & G.W.Saunders, 2019
  » Species Neosiphonia ferulacea (Suhr ex J.Agardh) S.M.Guimarães & M.T.Fujii, 2004 accepted as Melanothamnus ferulaceus (Suhr ex J.Agardh) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia flaccidissima (Hollenberg) M.S.Kim & I.K.Lee, 1999 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012
  » Species Neosiphonia flavimarina M.-S.Kim & I.K.Lee, 1999 accepted as Melanothamnus flavimarinus (M.-S.Kim & I.K.Lee) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia gorgoniae (Harvey) S.M.Guimarães & M.T.Fujii, 2004 accepted as Melanothamnus gorgoniae (Harvey) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia harlandii (Harvey) M.S.Kim & I.K.Lee, 1999 accepted as Melanothamnus harlandii (Harvey) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia harveyi (Bailey) M.-S.Kim, H.-G.Choi, Guiry & G.W.Saunders, 2001 accepted as Melanothamnus harveyi (Bailey) Díaz-Tapia & Maggs, 2017 (synonym)
  » Species Neosiphonia hawaiiensis (Hollenberg) M.-S.Kim & I.A.Abbott, 2006 accepted as Melanothamnus hawaiiensis (Hollenberg) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia howei (Hollenberg) Skelton & G.R.South, 2007 accepted as Wilsonosiphonia howei (Hollenberg) D.Bustamante, Won & T.O.Cho, 2017
  » Species Neosiphonia japonica (Harvey) M.-S.Kim & I.K.Lee, 1999 accepted as Melanothamnus japonicus (Harvey) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia johnstonii (Setchell & N.L.Gardner) J.N.Norris, 2014 accepted as Melanothamnus johnstonii (Setchell & N.L.Gardner) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia masonii (Setchell & N.L.Gardner) J.N.Norris, 2014 accepted as Melanothamnus masonii (Setchell & N.L.Gardner) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia mexicana (E.Y.Dawson) J.N.Norris, 2014 accepted as Lophosiphonia mexicana E.Y.Dawson, 1944
  » Species Neosiphonia notoensis (Segi) M.S.Kim & I.K.Lee, 1999 accepted as Melanothamnus notoensis (Segi) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia paniculata (Montagne) J.N.Norris, 2014 accepted as Polysiphonia paniculata Montagne, 1842
  » Species Neosiphonia peruviensis D.E.Bustamante, B.Y.Won, M.E.Ramirez & T.O.Cho, 2012 accepted as Melanothamnus peruviensis (D.E.Bustamante, B.Y.Won, M.E.Ramirez & T.O.Cho) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia poko (Hollenberg) I.A.Abbott, 2002 accepted as Polysiphonia poko Hollenberg, 1968
  » Species Neosiphonia polyphysa (Kützing) Skelton & G.R.South, 2007 accepted as Melanothamnus polyphysus (Kützing) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia porrecta (T.Segi) Y.-P.Lee, 2008 accepted as Melanothamnus porrectus (T.Segi) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia profunda (Hollenberg) M.-S.Kim & I.A.Abbott, 2006 accepted as Polysiphonia profunda Hollenberg, 1968
  » Species Neosiphonia ramireziae D.E.Bustamante, B.Y.Won & T.O.Cho, 2012 accepted as Melanothamnus ramireziae (D.E.Bustamante, B.Y. Won & T.O.Cho) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia rubrorhiza (Hollenberg) M.-S.Kim & I.A.Abbott, 2006 accepted as Polysiphonia rubrorhiza Hollenberg, 1968
  » Species Neosiphonia saccorhiza (Collins & Hervey) J.M.C.Nunes & S.M.Guimarães, 2010 accepted as Polysiphonia saccorhiza (Collins & Hervey) Hollenberg, 1968
  » Species Neosiphonia savatieri (Hariot) M.S.Kim & I.K.Lee, 1999 accepted as Melanothamnus savatieri (Hariot) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012 accepted as Polysiphonia sertularioides (Grateloup) J.Agardh, 1863
  » Species Neosiphonia silvae D.E.Bustamante, B.Y.Won & T.O.Cho, 2013 accepted as Melanothamnus silvae (D.E.Bustamante, B.Y.Won & T.O.Cho) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia simplex (Hollenberg) Y.-P.Lee, 2008 accepted as Melanothamnus simplex (Hollenberg) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia sparsa (Setchell) I.A.Abbott, 2002 accepted as Melanothamnus sparsus (Setchell) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia sphaerocarpa (Børgesen) M.-S.Kim & I.K.Lee, 1999 accepted as Melanothamnus sphaerocarpus (Børgesen) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia subtilissima (Montagne) M.S.Kim & I.K.Lee, 1999 accepted as Polysiphonia subtilissima Montagne, 1840
  » Species Neosiphonia tepida (Hollenberg) S.M.Guimarães & M.T.Fujii, 2004 accepted as Polysiphonia foetidissima Cocks ex Bornet, 1892
  » Species Neosiphonia teradomariensis (M.Noda) M.-S.Kim & I.K.Lee, 1999 accepted as Melanothamnus teradomariensis (M.Noda) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia thailandica N.Muangmai & C.Kaewsuralikhit, 2014 accepted as Melanothamnus thailandicus (N.Muangmai & C.Kaewsuralikhit) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia tongatensis (Harvey ex Kützing) M.-S.Kim & I.K.Lee, 1999 accepted as Melanothamnus tongatensis (Harvey ex Kützing) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia upolensis (Grunow) M.S.Kim & Boo, 2008 accepted as Melanothamnus upolensis (Grunow) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia yendoi (Segi) M.-S.Kim & I.K.Lee, 1999 accepted as Melanothamnus yendoi (T.Segi) Díaz-Tapia & Maggs, 2017
  » Species Neosiphonia yongpilii B.Kim & M.-S.Kim, 2016 accepted as Melanothamnus yongpilii (B.Kim & M.-S.Kim) Díaz-Tapia & Maggs, 2017 (synonym)
Genus Perrinia Womersley, 2003
Genus Pityophykos Papenfuss, 1958
Genus Polysiphonia Greville, 1823
  » Species Polysiphonia abscissa J.D.Hooker & Harvey, 1845
  » Species Polysiphonia abscissoides Womersley, 1979
  » Species Polysiphonia acanthina J.Agardh, 1863
  » Species Polysiphonia acroblasta Kützing
  » Species Polysiphonia acrolepta Zanardini ex A.De Toni
  » Species Polysiphonia acuminata N.L.Gardner, 1927
  » Species Polysiphonia adamsiae Womersley, 1979
  » Species Polysiphonia adsendens Meneghini, 1844
  » Species Polysiphonia agardhiana Greville
  » Species Polysiphonia allochroa (Roth) Duby, 1830
  » Species Polysiphonia amentacea (C.Agardh) Montagne
  » Species Polysiphonia amphibia Harvey
  » Species Polysiphonia amphibolis Womersley, 1979
  » Species Polysiphonia anisogona J.D.Hooker & Harvey, 1845
  » Species Polysiphonia anomala Hollenberg, 1968
  » Species Polysiphonia arachnoidea (C.Agardh) Zanardini, 1840
  » Species Polysiphonia arctica J.Agardh, 1863
  » Species Polysiphonia arenaria Postels & Ruprecht
  » Species Polysiphonia arenaria Kützing
  » Species Polysiphonia arenaria Harvey
  » Species Polysiphonia arenicola Kützing
  » Species Polysiphonia asperula Kützing
  » Species Polysiphonia asperula (Kützing) Kützing
  » Species Polysiphonia atlantica Kapraun & J.N.Norris, 1982
  » Species Polysiphonia atra Zanardini, 1847
  » Species Polysiphonia atricapilla J.Agardh, 1863
  » Species Polysiphonia atrorubens (Wahlenberg) Endlicher
  » Species Polysiphonia attenuata Zanardini
  » Species Polysiphonia aurantiaca Kützing
  » Species Polysiphonia australiensis Womersley, 1979
  » Species Polysiphonia awabiensis Noda
  » Species Polysiphonia azorica O.C.Schmidt, 1929
  » Species Polysiphonia baileyi (Harvey) J.Agardh
  » Species Polysiphonia bambusina Meneghini
  » Species Polysiphonia banyulensis Coppejans, 1976
  » Species Polysiphonia barbatula Kützing, 1849
  » Species Polysiphonia baxteri A.H.S.Lucas, 1935
  » Species Polysiphonia beaudettei Hollenberg, 1961
  » Species Polysiphonia beguinotii Schiffner & Vatova, 1938
  » Species Polysiphonia beltoniorum Huisman, 2018
  » Species Polysiphonia biasolettiana Zanardini
  » Species Polysiphonia bicornis Ohta, 1973
  » Species Polysiphonia biformis Zanardini, 1860
  » Species Polysiphonia bifurcata Hollenberg, 1945
  » Species Polysiphonia binderi Bonder
  » Species Polysiphonia binderi (J.Agardh) Goebel
  » Species Polysiphonia binneyi Harvey, 1853
  » Species Polysiphonia boergesenii Baardseth, 1941
  » Species Polysiphonia breviarticulata (C.Agardh) Zanardini, 1840
  » Species Polysiphonia brevisegmenta Womersley, 1979
  » Species Polysiphonia caespitosa (M.A.Pocock) Hollenberg, 1968
  » Species Polysiphonia callithamnioides P.Crouan & H.Crouan, 1865
  » Species Polysiphonia camerunensis Pilger, 1911
  » Species Polysiphonia capucina P.Crouan & H.Crouan, 1865
  » Species Polysiphonia caramiiformis P.L.Crouan & H.M.Crouan
  » Species Polysiphonia carettia Hollenberg, 1971
  » Species Polysiphonia castagnei Kützing, 1863
  » Species Polysiphonia castelliana De Notaris & L.Dufour, 1865
  » Species Polysiphonia ceramiiformis P.L.Crouan & H.M.Crouan, 1867
  » Species Polysiphonia cladorhiza Ardissone, 1864
  » Species Polysiphonia cladorrhiza Ardissone, 1864
  » Species Polysiphonia clevelandii Farlow
  » Species Polysiphonia coacta C.K.Tseng, 1944
  » Species Polysiphonia coccinea (Hudson) Sprengel
  » Species Polysiphonia codicola Zanardini ex Frauenfeld, 1855
  » Species Polysiphonia cokeri Hollenberg
  » Species Polysiphonia corallicola Grunow
  » Species Polysiphonia corinaldii (Meneghini) De Notaris
  » Species Polysiphonia corinaldii (Meneghini) De Notaris, 1846
  » Species Polysiphonia corymbosa J.Agardh, 1863
  » Species Polysiphonia crassa Okamura, 1902
  » Species Polysiphonia crassicollis Børgesen, 1939
  » Species Polysiphonia crassiuscula Harvey, 1859
  » Species Polysiphonia curta Montagne, 1843
  » Species Polysiphonia dachenensis S.-D.Xiang, 2007
  » Species Polysiphonia dalmatica Meneghini, 1844
  » Species Polysiphonia dasyiformis (Kützing) Zanardini, 1862
  » Species Polysiphonia dasyoeformis P.L.Crouan & H.M.Crouan, 1865
  » Species Polysiphonia daveyae Reinbold, 1899
  » Species Polysiphonia decipiens Montagne, 1842
  » Species Polysiphonia decussata Hollenberg, 1942
  » Species Polysiphonia delicata Díaz-Tapia, 2017
  » Species Polysiphonia delicatula Hollenberg, 1968
  » Species Polysiphonia denticulata Kützing
  » Species Polysiphonia denticulata Delle Chiaje
  » Species Polysiphonia derbesii Solier ex Kützing, 1849
  » Species Polysiphonia deschampsii (Agardh) P.L.Crouan & H.M.Crouan
  » Species Polysiphonia determinata (Hollenberg) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia deusta (Roth) Sprengel, 1827
  » Species Polysiphonia devoniensis Maggs & Hommersand, 1993
  » Species Polysiphonia dichotoma Kützing, 1843
  » Species Polysiphonia dictyura Liebmann ex Kützing, 1849
  » Species Polysiphonia dillwynii Kützing
  » Species Polysiphonia dillwynii (Kützing) Kützing
  » Species Polysiphonia divergens J.Agardh, 1842
  » Species Polysiphonia dokdoensis D.E.Bustamante, B.Y.Won & T.O.Cho, 2014
  » Species Polysiphonia donghaeya B.Kim & M.S.Kim, 2015
  » Species Polysiphonia dotyi Hollenberg, 1968
  » Species Polysiphonia doubletiae Sauvageau
  » Species Polysiphonia dumosa J.D.Hooker & Harvey, 1845
  » Species Polysiphonia echigoensis Noda, 1975
  » Species Polysiphonia episcopalis Zanardini
  » Species Polysiphonia erythraea Schousboe ex J.Agardh
  » Species Polysiphonia exigua Kützing, 1843
  » Species Polysiphonia exilis Harvey, 1853
  » Species Polysiphonia fasciculata Harvey ex Moore, 1837
  » Species Polysiphonia fasciculifera Kützing
  » Species Polysiphonia fernandeziana M.P.Reis, 1977
  » Species Polysiphonia ferox J.Agardh
  » Species Polysiphonia figariana Zanardini, 1858
  » Species Polysiphonia firma Zanardini
  » Species Polysiphonia flabelliformis J.D.Hooker & Harvey, 1845
  » Species Polysiphonia flabellulata Harvey, 1860
  » Species Polysiphonia flaccida Rabenhorst
  » Species Polysiphonia flagellifera Reinsch
  » Species Polysiphonia flexella (C.Agardh) J.Agardh, 1842
  » Species Polysiphonia flexicaulis (Harvey) F.S.Collins, 1911
  » Species Polysiphonia flocculosa (C.Agardh) Endlichter, 1843
  » Species Polysiphonia foeniculacea (C.Agardh) Sprengel, 1827
  » Species Polysiphonia forfex Harvey, 1859
  » Species Polysiphonia fragilis Suringar, 1867
  » Species Polysiphonia funebris De Notaris ex J.Agardh, 1851
  » Species Polysiphonia funicularis Meneghini
  » Species Polysiphonia funicularis (Meneghini ex Kützing) Kützing
  » Species Polysiphonia fuscorubens J.D.Hooker & Harvey, 1847
  » Species Polysiphonia gaudichaudii (C.Agardh) Kützing
  » Species Polysiphonia gemmifera Yates
  » Species Polysiphonia giraudii Derb. & Sol.
  » Species Polysiphonia gonatophora Kützing
  » Species Polysiphonia gracilis C.K.Tseng, 1944
  » Species Polysiphonia guadalupensis Setchell & N.L.Gardner, 1930
  » Species Polysiphonia guernisacii (P.L.Crouan & H.M.Crouan) J.Agardh, 1863
  » Species Polysiphonia hapalacantha Harvey, 1853
  » Species Polysiphonia haplodasyae Womersley, 1979
  » Species Polysiphonia hassleri W.R.Taylor, 1939
  » Species Polysiphonia havanensis Montagne, 1837
  » Species Polysiphonia havaniensis
  » Species Polysiphonia hemisphaerica Areschoug, 1875
  » Species Polysiphonia herpa Hollenberg, 1968
  » Species Polysiphonia hirsuta (Roth) Wallroth
  » Species Polysiphonia hirsuta Zanardini
  » Species Polysiphonia hirta J.Agardh, 1842
  » Species Polysiphonia hochstetteriana O.C.Schmidt, 1929
  » Species Polysiphonia hockstetteriana O.C.Schmidt, 1929
  » Species Polysiphonia hollenbergii J.N.Norris, 2014
  » Species Polysiphonia homoia Setchell & N.L.Gardner, 1930
  » Species Polysiphonia implexa J.D.Hooker & Harvey, 1845
  » Species Polysiphonia indigena Hollenberg, 1958
  » Species Polysiphonia infestans Harvey, 1855
  » Species Polysiphonia isogona Harvey, 1855
  » Species Polysiphonia jacobii De Notaris
  » Species Polysiphonia kampsaxii Børgesen, 1939
  » Species Polysiphonia kappannae Sreenivasa Rao, 1967
  » Species Polysiphonia kapraunii B.Stuercke & D.W.Freshwater, 2010
  » Species Polysiphonia kieliana Kaminski & Nizamuddin, 1975
  » Species Polysiphonia kotschyana Grunow, 1868
  » Species Polysiphonia kowiensis Stegenga, Bolton & R.J.Anderson, 1997
  » Species Polysiphonia leptothrix Zanardini
  » Species Polysiphonia letestui P.Dangeard, 1986
  » Species Polysiphonia linocladia Kützing
  » Species Polysiphonia lophura Kützing
  » Species Polysiphonia lophuroides Kützing
  » Species Polysiphonia lubrica (C.Agardh) Zanardini
  » Species Polysiphonia lusitanica Montagne ex Kützing
  » Species Polysiphonia luxurians (Agardh) par
  » Species Polysiphonia macounii Hollenberg, 1942
  » Species Polysiphonia macra Harvey, 1855
  » Species Polysiphonia macrocarpa (C.Agardh) Sprengel, 1827
  » Species Polysiphonia marchantiae Setchell & N.L.Gardner, 1924
  » Species Polysiphonia marrowii Harvey
  » Species Polysiphonia meneghiniana De Notaris
  » Species Polysiphonia micrantha Zanardini
  » Species Polysiphonia mollis J.D.Hooker & Harvey, 1847
  » Species Polysiphonia morisiana J.Agardh, 1842
  » Species Polysiphonia morrowii Harvey, 1857
  » Species Polysiphonia mottei Lauret, 1967
  » Species Polysiphonia muninsula B.Kim & M.S.Kim, 2015
  » Species Polysiphonia namibiensis Stegenga & Engeldow, 1997
  » Species Polysiphonia nathanielii Hollenberg, 1958
  » Species Polysiphonia nebulosa Zanardini
  » Species Polysiphonia neglecta Bornet, 2002
  » Species Polysiphonia nhatrangense Pham-Hoàng Hô, 1969
  » Species Polysiphonia nhatrangensis Pham-Hoàng Hó, 1969
  » Species Polysiphonia nigrella P.L.Crouan & H.M.Crouan
  » Species Polysiphonia nitens Meneghini
  » Species Polysiphonia nizamuddinii Farooqui & Begum, 1978
  » Species Polysiphonia nodifera Kützing
  » Species Polysiphonia nodulosa J.Agardh, 1842
  » Species Polysiphonia notarisii Meneghini
  » Species Polysiphonia ocellata Gratel.
  » Species Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839
  » Species Polysiphonia orbigniana Kützing
  » Species Polysiphonia ornata J.Agardh, 1842
  » Species Polysiphonia orthocarpa Rosenvinge, 1924
  » Species Polysiphonia pacifica Hollenberg, 1942
  » Species Polysiphonia paniculata Montagne, 1842
  » Species Polysiphonia pantophloea Kützing
  » Species Polysiphonia paradoxa Thuret, 1876
  » Species Polysiphonia parthasarathyae Sreenivasa Rao
  » Species Polysiphonia parthasarathyi Sreenivasa Rao, 1967
  » Species Polysiphonia parvula Suhr ex Kützing, 1864
  » Species Polysiphonia parvula (C.Agardh) Montagne, 1846
  » Species Polysiphonia pennata (Roth.) Falkenberg
  » Species Polysiphonia perforans Cormaci, G.Furnari, Pizzuto & Serio, 1998
  » Species Polysiphonia periclados (C.Agardh) Endlicher
  » Species Polysiphonia pernacola N.M.Adams, 1991
  » Species Polysiphonia perriniae Womersley, 1979
  » Species Polysiphonia peucedanoides (Bonnem.) P.L.Crouan & H.M.Crouan
  » Species Polysiphonia pilosa (F.L.Naccari) G.Zanardini
    » Variety Polysiphonia pilosa var. minor Bertoloni, 1867 (uncertain, uncertain taxonomic status subjected to verification)
  » Species Polysiphonia platyspira Kützing
  » Species Polysiphonia plectrocarpa C.W.Schneider, 1998
  » Species Polysiphonia polycarpa Kützing
  » Species Polysiphonia polychotoma Kützing
  » Species Polysiphonia polychroma G.Martens, 1871
  » Species Polysiphonia polyrhiza Kützing
  » Species Polysiphonia polyspora (C.Agardh) Montagne, 1840
  » Species Polysiphonia porphyroides Kützing, 1849
  » Species Polysiphonia profunda Hollenberg, 1968
  » Species Polysiphonia propagulifera Womersley, 1979
  » Species Polysiphonia pulvinata (Roth) Sprengel, 1827
  » Species Polysiphonia purpurascens Harvey
  » Species Polysiphonia purpureocoerulea Sonder
  » Species Polysiphonia pygmaea Kützing, 1845
  » Species Polysiphonia quadrata Hollenberg, 1968
  » Species Polysiphonia radiata Díaz-Tapia, 2017
  » Species Polysiphonia raineriana (Zanardini) Zanardini
  » Species Polysiphonia ramentacea Harvey, 1853
  » Species Polysiphonia recurva (C.Agardh) Sprengel
  » Species Polysiphonia requienii Montagne ex Kützing, 1849
  » Species Polysiphonia rhunensis Thuret, 1878
  » Species Polysiphonia rigens (C.A.Agardh) G.Zanardini
  » Species Polysiphonia rigidula Kützing, 1847
  » Species Polysiphonia rubrorhiza Hollenberg, 1968
  » Species Polysiphonia rudis J.D.Hooker & Harvey, 1845
  » Species Polysiphonia rugulosa Kützing
  » Species Polysiphonia rutilans Kützing, 1849
  » Species Polysiphonia saccorhiza (Collins & Hervey) Hollenberg, 1968
  » Species Polysiphonia sadoensis Noda, 1963
  » Species Polysiphonia sanguinea (C.Agardh) Zanardini, 1840
  » Species Polysiphonia saxicola G.Zanardini
  » Species Polysiphonia scopulorum Harvey, 1855
    » Variety Polysiphonia scopulorum var. minima Hollenberg
    » Variety Polysiphonia scopulorum var. villum (J.Agardh) Hollenberg, 1968 accepted as Polysiphonia villum J.Agardh, 1863
    » Variety Polysiphonia scopulorum var. longinodium S.-D.Xiang, 2004 (uncertain)
    » Variety Polysiphonia scopulorum var. macrotrichia Hollenberg, 1968 (uncertain)
    » Variety Polysiphonia scopulorum var. minimum Hollenberg, 1968 (uncertain, uncertain taxonomic status subjected to verification)
  » Species Polysiphonia senticulosa Harvey, 1862
  » Species Polysiphonia serpens (Dufour) De Notaris ex Ardissone
  » Species Polysiphonia setigera Kützing, 1849
  » Species Polysiphonia shepherdii Womersley, 1979
  » Species Polysiphonia siamensis V.Martens
  » Species Polysiphonia simplicifilum J.Agardh
  » Species Polysiphonia sinicola Setchell & Gardner, 1924
  » Species Polysiphonia solieri J.Agardh
  » Species Polysiphonia sonorensis Hollenberg, 1942
  » Species Polysiphonia souriei Feldmann
  » Species Polysiphonia sphacelarioides J.Agardh, 1885
  » Species Polysiphonia sphaerospora Børgesen
  » Species Polysiphonia spinella C.Agardh, 1820
  » Species Polysiphonia spinescens Montagne
  » Species Polysiphonia spinosa (C.Agardh) J.Agardh, 1842
  » Species Polysiphonia spinulifera Reinsch, 1875
  » Species Polysiphonia stictophlaea Kützing
  » Species Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824
  » Species Polysiphonia strictioides (Lyngbye) Derb. & Sol.
  » Species Polysiphonia stuposa Zanardini ex Kützing, 1864
  » Species Polysiphonia subcontorta C.H.Peck, 1872
  » Species Polysiphonia subtilis De Notaris, 1841
  » Species Polysiphonia subtilis Ardissone, 1863
  » Species Polysiphonia subtilissima Montagne, 1840
  » Species Polysiphonia subulata (Ducluzeau) Kützing, 1863
  » Species Polysiphonia succulenta Harvey, 1859
  » Species Polysiphonia sulcata Rudolphi, 1831
  » Species Polysiphonia tapinocarpa Suringar, 1867
  » Species Polysiphonia tenerrima Kützing, 1843
  » Species Polysiphonia tenuistriata J.D.Hooker & Harvey, 1845
  » Species Polysiphonia tinctoria De Notaris
  » Species Polysiphonia tinctoria Zanardini
  » Species Polysiphonia tokidae Segi, 1951
  » Species Polysiphonia triton P.C.Silva, 1987
  » Species Polysiphonia tsudana Hollenberg, 1968
  » Species Polysiphonia tuberosa Hollenberg, 1968
  » Species Polysiphonia turgidula P.L.Crouan & H.M.Crouan
  » Species Polysiphonia tuticorinensis Børgesen, 1938
  » Species Polysiphonia ulex Derbes & Solier
  » Species Polysiphonia ulleungensis D.E.Bustamante, B.Y.Won & T.O.Cho, 2014
  » Species Polysiphonia uncinata Kützing, 1843
  » Species Polysiphonia uncinata (Bonnemaison) P.Crouan & H.Crouan, 1852
  » Species Polysiphonia unguiformis Børgesen, 1937
  » Species Polysiphonia urbanoides Levring, 1944
  » Species Polysiphonia urceoleta
  » Species Polysiphonia utricularis Zanardini, 1851
  » Species Polysiphonia vaga Kützing
  » Species Polysiphonia vaga (Kützing) Kützing
  » Species Polysiphonia variabilis Harvey
  » Species Polysiphonia variabilis Hooker & Harvey
  » Species Polysiphonia villifera (C.Agardh) Endlicher
  » Species Polysiphonia villum J.Agardh, 1863
  » Species Polysiphonia vinosa Kützing
  » Species Polysiphonia violaceum
  » Species Polysiphonia wulfenii Kützing, 1843
  » Species Polysiphonia zanardinii Schiffner
  » Species Polysiphonia acanthophora Kützing, 1843 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012
  » Species Polysiphonia acanthophora Harvey, 1844 accepted as Echinothamnion hookeri (Harvey) Kylin ex P.C.Silva, 1996
  » Species Polysiphonia acanthotricha Kützing, 1847 accepted as Polysiphonia flexella (C.Agardh) J.Agardh, 1842 (synonym)
  » Species Polysiphonia aculeata (C.Agardh) Fries, 1845 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia aculeifera Zanardini, 1847 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (synonym)
  » Species Polysiphonia adunca Kützing, 1849 accepted as Lophosiphonia reptabunda (Suhr) Kylin, 1956
  » Species Polysiphonia affinis Moore, 1837 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (synonym)
  » Species Polysiphonia aggregata Segi, 1944 accepted as Neosiphonia savatieri (Hariot) M.S.Kim & I.K.Lee, 1999
  » Species Polysiphonia akkeshiensis Segi, 1951 accepted as Melanothamnus akkeshiensis (Segi) A.M.Saunders & G.W.Saunders, 2019
  » Species Polysiphonia amoena Sonder, 1855 accepted as Polysiphonia isogona Harvey, 1855
  » Species Polysiphonia amplacapilli B.Kim & M.S.Kim, 2014 accepted as Kapraunia amplacapilli (B.Kim & M.S.Kim) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia angustissima Kützing, 1864 accepted as Polysiphonia subtilissima Montagne, 1840
  » Species Polysiphonia apiculata Hollenberg, 1968 accepted as Melanothamnus apiculatus (Hollenberg) Díaz- Tapia & Maggs, 2017
  » Species Polysiphonia aquamara I.A.Abbott, 1947 accepted as Neosiphonia tongatensis (Harvey ex Kützing) M.-S.Kim & I.K.Lee, 1999
  » Species Polysiphonia arborescens Kützing, 1843 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (synonym)
  » Species Polysiphonia argentinica W.R.Taylor, 1939 accepted as Neosiphonia harveyi (Bailey) M.-S.Kim, H.-G.Choi, Guiry & G.W.Saunders, 2001
  » Species Polysiphonia argus Kützing, 1864 accepted as Herposiphonia versicolor (Hooker & Harvey) Reinbold, 1899
  » Species Polysiphonia armata J.Agardh, 1842 accepted as Polysiphonia subulifera (C.Agardh) Harvey, 1834
  » Species Polysiphonia aterrima J.D.Hooker & Harvey, 1845 accepted as Vertebrata aterrima (J.Hooker & Harvey) Kuntze, 1891
  » Species Polysiphonia atropurpurea Moore, 1837 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891
  » Species Polysiphonia atrorubescens (Dillwyn) Greville, 1824 accepted as Polysiphonia nigra (Hudson) Batters, 1902
  » Species Polysiphonia aurata Harvey, 1855 accepted as Tiparraria aurata (Harvey) Womersley, 2003
  » Species Polysiphonia australis (C.Agardh) J.Agardh, 1863 accepted as Brongniartella australis (C.Agardh) F.Schmitz, 1893
  » Species Polysiphonia badia (Dillwyn) Sprengel, 1827 accepted as Polysiphonia nigra (Hudson) Batters, 1902
  » Species Polysiphonia badia Kützing, 1849 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012
  » Species Polysiphonia bajacali Hollenberg, 1961 accepted as Melanothamnus bajacali (Hollenberg) Díaz-Tapia & Maggs, 2017 (synonym)
  » Species Polysiphonia balanicola Falkenberg, 1901 accepted as Polysiphonia funebris De Notaris ex J.Agardh, 1851
  » Species Polysiphonia bangi Kützing, 1849 accepted as Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893
  » Species Polysiphonia bangii (Kützing) Kützing, 1864 accepted as Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893
  » Species Polysiphonia bartlingiana Kützing, 1843 accepted as Symphyocladiella bartlingiana (Kützing) D.Bustamante, B.Y.Won & T.O.Cho, 2019
  » Species Polysiphonia beguinottii Schiffner, 1938 accepted as Polysiphonia beguinotii Schiffner & Vatova, 1938
  » Species Polysiphonia berkeleyi (Montagne) J.D.Hooker, 1847 accepted as Heterosiphonia berkeleyi Montagne, 1842
  » Species Polysiphonia bharadwajae Sreenivasa Rao, 1967 accepted as Polysiphonia ferulacea Suhr ex J.Agardh, 1863
  » Species Polysiphonia biasolettoana Zanardini, 1841 accepted as Polysiphonia deusta (Roth) Sprengel, 1827
  » Species Polysiphonia biasolettoana (C.Agardh) J.Agardh, 1842 accepted as Polysiphonia deusta (Roth) Sprengel, 1827
  » Species Polysiphonia bipinnata Postels & Ruprecht, 1840 accepted as Savoiea bipinnata (Postels & Ruprecht) M.J.Wynne, 2018
  » Species Polysiphonia blandii Harvey, 1862 accepted as Melanothamnus blandii (Harvey) Diaz-Tapia & Maggs, 2017
  » Species Polysiphonia boldii M.J.Wynne & P.Edwards, 1970 accepted as Polysiphonia hemisphaerica var. boldii (M.J.Wynne & P.Edwards) Rueness, 1973 (synonym)
  » Species Polysiphonia bostrychioides P.L.Crouan & H.M.Crouan, 1865 accepted as Bostrychia moritziana (Sonder ex Kützing) J.Agardh, 1863
  » Species Polysiphonia botryocarpa J.D.Hooker & Harvey, 1845 accepted as Microcolax botryocarpus (J.D.Hooker & Harvey) F.Schmitz, 1897
  » Species Polysiphonia brodiaei (Dillwyn) Sprengel, 1827 accepted as Polysiphonia brodiei (Dillwyn) Sprengel, 1827
  » Species Polysiphonia brodiei (Dillwyn) Sprengel, 1827 accepted as Leptosiphonia brodiei (Dillwyn) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia bulbosa Fries, 1845 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (synonym)
  » Species Polysiphonia byssacea (Kützing) Kützing, 1864 accepted as Polysiphonia byssoides var. byssacea Kützing, 1843 (synonym)
  » Species Polysiphonia byssoclados Harvey, 1844 accepted as Brongniartella australis (C.Agardh) F.Schmitz, 1893
  » Species Polysiphonia byssoides (Goodenough & Woodward) Greville, 1824 accepted as Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893
  » Species Polysiphonia caespitosa S.-D.Xiang, 2004 accepted as Polysiphonia dachenensis S.-D.Xiang, 2007
  » Species Polysiphonia caespitula Sonder, 1855 accepted as Polysiphonia decipiens Montagne, 1842
  » Species Polysiphonia calacantha Harvey, 1859 accepted as Tolypiocladia glomerulata (C.Agardh) F.Schmitz, 1897
  » Species Polysiphonia californica Harvey, 1853 accepted as Polysiphonia paniculata Montagne, 1842
  » Species Polysiphonia callithamnion Sonder, 1845 accepted as Polysiphonia callithamnium Sonder, 1845
  » Species Polysiphonia callithamnium Sonder, 1845 accepted as Heterosiphonia callithamnium (Sonder) Falkenberg, 1901
  » Species Polysiphonia calodictyon Harvey ex Kützing, 1864 accepted as Tolypiocladia calodictyon (Harvey ex Kützing) P.C.Silva, 1952
  » Species Polysiphonia calothrix Harvey, 1855 accepted as Herposiphonia calothrix (Harvey) Womersley, 2003
  » Species Polysiphonia campanulata Delle Chiaje, 1829 accepted as Rytiphlaea tinctoria (Clemente) C.Agardh, 1824 (synonym)
  » Species Polysiphonia camptoclada Montagne, 1837 accepted as Streblocladia camptoclada (Montagne) Falkenberg, 1901
  » Species Polysiphonia cancellata Harvey, 1844 accepted as Polysiphonia decipiens Montagne, 1842
  » Species Polysiphonia carmichaeliana Harvey, 1833 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (synonym)
  » Species Polysiphonia caspia Kützing, 1843 accepted as Polysiphonia ornata J.Agardh, 1842 (synonym)
  » Species Polysiphonia caspica Kützing, 1843 accepted as Polysiphonia ornata J.Agardh, 1842
  » Species Polysiphonia ceratoclada Montagne, 1842 accepted as Herposiphonia ceratoclada (Montagne) Reinbold, 1899
  » Species Polysiphonia cervicornis Kützing, 1847 accepted as Bryocladia cervicornis (Kützing) F.Schmitz, 1897
  » Species Polysiphonia chalarophloea Kützing, 1849 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (synonym)
  » Species Polysiphonia chrysoderma Kützing, 1849 accepted as Polysiphonia breviarticulata (C.Agardh) Zanardini, 1840
  » Species Polysiphonia cladostephus Montagne, 1843 accepted as Brongniartella australis (C.Agardh) F.Schmitz, 1893
  » Species Polysiphonia clavigera Kützing, 1849 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia cloiophylla (C.Agardh) J.Agardh, 1863 accepted as Pterosiphonia cloiophylla (C.Agardh) Falkenberg, 1897
  » Species Polysiphonia coarctata Kützing, 1849 accepted as Polysiphonia furcellata (C.Agardh) Harvey, 1833
  » Species Polysiphonia colensoi J.D.Hooker & Harvey, 1855 accepted as Metamorphe colensoi (J.D.Hooker & Harvey) Falkenberg, 1897
  » Species Polysiphonia collabens (C.Agardh) Kützing, 1849 accepted as Melanothamnus collabens (C.Agardh) Díaz-Tapia & Maggs, 2017
  » Species Polysiphonia collinsii Hollenberg, 1944 accepted as Vertebrata hendryi (N.L.Gardner) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia comatula Kützing, 1849 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956
  » Species Polysiphonia commutata Kützing, 1849 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (synonym)
  » Species Polysiphonia comoides Harvey, 1855 accepted as Polysiphonia isogona Harvey, 1855
  » Species Polysiphonia comosa J.D.Hooker & Harvey, 1845 accepted as Lophurella comosa (J.D.Hooker & Harvey) Falkenberg, 1901
  » Species Polysiphonia comosa Kützing, 1843 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956
  » Species Polysiphonia compacta A.H.S.Lucas, 1913 accepted as Polysiphonia isogona Harvey, 1855
  » Species Polysiphonia complanata (Clemente) J.Agardh, 1863 accepted as Pterosiphonia complanata (Clemente) Falkenberg, 1897
  » Species Polysiphonia concinna Hollenberg, 1944 accepted as Melanothamnus concinnus (Hollenberg) Díaz-Tapia & Maggs, 2017 (synonym)
  » Species Polysiphonia condensata Kützing, 1863 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839
  » Species Polysiphonia confusa Hollenberg, 1961 accepted as Eutrichosiphonia confusa (Hollenberg) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia constricta Womersley, 1979 accepted as Vertebrata constricta (Womersley) Díaz-Tapia & Maggs, 2017
  » Species Polysiphonia corymbifera (C.Agardh) Endlicher, 1843 accepted as Streblocladia corymbifera (C.Agardh) Kylin, 1938
  » Species Polysiphonia cristata Harvey, 1836 accepted as Pterosiphonia complanata (Clemente) Falkenberg, 1897
  » Species Polysiphonia cuspidata J.Agardh, 1852 accepted as Bryocladia cuspidata (J.Agardh) De Toni, 1903
  » Species Polysiphonia cymosa Kützing, 1849 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956
  » Species Polysiphonia cystophyllicola Noda, 1975 accepted as Neosiphonia yendoi (Segi) M.-S.Kim & I.K.Lee, 1999
  » Species Polysiphonia dasyoides Zanardini, 1874 accepted as Echinothamnion hookeri (Harvey) Kylin ex P.C.Silva, 1996
  » Species Polysiphonia daviesii J.D.Hooker & Harvey, 1845 accepted as Heterosiphonia berkeleyi Montagne, 1842
  » Species Polysiphonia decumbens Segi, 1951 accepted as Melanothamnus decumbens (T.Segi) Díaz-Tapia & Maggs, 2017
  » Species Polysiphonia delphina De Notaris, 1846 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia deludens Falkenberg, 1901 accepted as Boergeseniella deludens (Falkenberg) Kylin, 1956
  » Species Polysiphonia dendritica (C.Agardh) J.Agardh, 1863 accepted as Dipterosiphonia dendritica (C.Agardh) F.Schmitz, 1897
  » Species Polysiphonia dendroidea Montagne, 1837 accepted as Symphyocladiella dendroidea (Montagne) D.Bustamante, B.Y.Won, S.C.Lindstrom & T.O.Cho, 2019
  » Species Polysiphonia denudata (Dillwyn) Greville ex Harvey, 1833 accepted as Carradoriella denudata (Dillwyn) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia deusta Kützing accepted as Polysiphonia sanguinea (C.Agardh) Zanardini, 1840
  » Species Polysiphonia deusta (Roth) J.Agardh, 1842 accepted as Polysiphonia deusta (Roth) Sprengel, 1827
  » Species Polysiphonia dichotoma Hollenberg, 1944 accepted as Polysiphonia indigena Hollenberg, 1958 (synonym)
  » Species Polysiphonia dictyurus J.Agardh, 1847 accepted as Tayloriella dictyurus (J.Agardh) Kylin, 1956
  » Species Polysiphonia dilatata Kützing accepted as Polysiphonia arachnoidea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia disticha Zanardini, 1847 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia divaricata (C.Agardh) Sprengel, 1827 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia dysanophora Kützing, 1843 accepted as Polysiphonia arachnoidea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia eastwoodiae Setchell & N.L.Gardner, 1930 accepted as Melanothamnus eastwoodiae (Setchell & N.L.Gardner) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia echinata Harvey, 1853 accepted as Acanthosiphonia echinata (Harvey) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia elongata (Hudson) Sprengel, 1827 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
    » Forma Polysiphonia elongata f. baltica Rosenvinge, 1924
    » Forma Polysiphonia elongata f. denudata (C.Agardh) Batters, 1890 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827 (synonym)
    » Forma Polysiphonia elongata f. expansa (C.Agardh) J.Agardh ex Levring, 1940 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
    » Forma Polysiphonia elongata f. gelatinosa Kylin, 1907 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827 (synonym)
    » Forma Polysiphonia elongata f. gelatinosa (Kylin) Kylin, 1944 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827 (synonym)
    » Forma Polysiphonia elongata f. glomerata Gran, 1897 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Forma Polysiphonia elongata f. lyngbyei (C.Agardh) J.Agardh, 1863 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Forma Polysiphonia elongata f. microdendron (J.Agardh) Kjellman, 1880 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Forma Polysiphonia elongata f. nana Gran, 1897 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Forma Polysiphonia elongata f. schuebeleri (Foslie) Rosenvinge, 1924 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. arborescens (Kützing) Schiffner accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. denudata (C.Agardh) Zanardini, 1841 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827 (synonym)
    » Variety Polysiphonia elongata var. haematites (Kützing) Schiffner & Vatova, 1938 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019
    » Variety Polysiphonia elongata var. microdendron (J.Agardh) Gran, 1897 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. robusta (Kützing) Schiffner accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. rosea (Greville) J.Agardh accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. ruchingeri (C.Agardh) Schiffner accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. sanguinolenta (C.Agardh) Harvey, 1833 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. ß denudata Harvey, 1833 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
    » Variety Polysiphonia elongata var. stenocarpa (Kützing) Schiffner accepted as Polysiphonia elongata (Hudson) Sprengel, 1827
  » Species Polysiphonia elongella Harvey, 1833 accepted as Carradoriella elongella (Harvey) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia ericoides Harvey, 1847 accepted as Perrinia ericoides (Harvey) Womersley, 2003 (unaccepted)
  » Species Polysiphonia erythrocoma Kützing, 1843 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia expansa (C.Agardh) Endlichter, 1843 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia falcata Kützing, 1863 accepted as Herposiphonia falcata (Kützing) De Toni, 1903 (unaccepted)
  » Species Polysiphonia fasciculata Kützing, 1843 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia fastigiata (Roth) Greville, 1824 accepted as Vertebrata lanosa (Linnaeus) T.A.Christensen, 1967 (unaccepted, synonym)
  » Species Polysiphonia ferulacea Suhr ex J.Agardh, 1863 accepted as Neosiphonia ferulacea (Suhr ex J.Agardh) S.M.Guimarães & M.T.Fujii, 2004 (unaccepted, synonym)
  » Species Polysiphonia ferulaceae Suhr. Ex J. Ag. accepted as Polysiphonia ferulacea Suhr ex J.Agardh, 1863 (unaccepted, misspelling)
  » Species Polysiphonia fibrata (Dillwyn) Harvey, 1833 accepted as Leptosiphonia fibrata (C.Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia fibrillosa (Dillwyn) J.Agardh, 1842 accepted as Polysiphonia fibrillosa (C.Agardh) Sprengel, 1827 (unaccepted)
  » Species Polysiphonia fibrillosa (C.Agardh) Sprengel, 1827 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
    » Variety Polysiphonia fibrillosa var. spinifera J.Agardh (uncertain)
  » Species Polysiphonia filamentosa (Wulfen) Sprengel, 1827 accepted as Spyridia filamentosa (Wulfen) Harvey, 1833 (unaccepted, synonym)
  » Species Polysiphonia filipendula Harvey ex J.Agardh, 1863 accepted as Herposiphonia filipendula (Harvey ex J.Agardh) Falkenberg ex De Toni, 1903 (unaccepted)
  » Species Polysiphonia flaccidissima Hollenberg, 1942 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012 (unaccepted, synonym)
  » Species Polysiphonia flavescens Zanardini, 1874 accepted as Polysiphonia mollis J.D.Hooker & Harvey, 1847 (unaccepted)
  » Species Polysiphonia foetidissima Cocks ex Bornet, 1892 accepted as Vertebrata foetidissima (Cocks ex Bornet) Díaz-Tapia & Maggs, 2017 (unaccepted, synonym)
  » Species Polysiphonia forcipata Harvey, 1855 accepted as Polysiphonia forfex Harvey, 1859 (unaccepted)
  » Species Polysiphonia forcipata J.Agardh, 1842 accepted as Polysiphonia furcellata (C.Agardh) Harvey, 1833 (unaccepted)
  » Species Polysiphonia formosa Suhr, 1831 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (unaccepted, synonym)
  » Species Polysiphonia fracta Harvey, 1853 accepted as Acanthosiphonia echinata (Harvey) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia fragilis Sperk [Shperk], 1869 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia frutex Harvey, 1844 accepted as Polysiphonia decipiens Montagne, 1842 (unaccepted)
  » Species Polysiphonia fruticulosa (Wulfen) Sprengel, 1827 accepted as Vertebrata fruticulosa (Wulfen) Kuntze, 1891 (unaccepted, synonym)
  » Species Polysiphonia fucoides (Hudson) Greville, 1824 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (unaccepted, synonym)
  » Species Polysiphonia fuliginosa Rudolphi, 1831 accepted as Carradoriella virgata (C.Agardh) P.C.Silva, 1996 (unaccepted)
  » Species Polysiphonia furcellata (C.Agardh) Harvey, 1833 accepted as Vertebrata furcellata (C.Agardh) Kuntze, 1891 (unaccepted, synonym)
  » Species Polysiphonia fuscescens Harvey, 1844 accepted as Polysiphonia decipiens Montagne, 1842 (unaccepted)
  » Species Polysiphonia gardneri Kylin, 1941 accepted as Vertebrata hendryi (N.L.Gardner) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia glomerulata (C.Agardh) Sprengel, 1827 accepted as Tolypiocladia glomerulata (C.Agardh) F.Schmitz, 1897 (unaccepted)
  » Species Polysiphonia gopnathensis Thivy & Sreenivasa Rao, 1963 accepted as Polysiphonia platycarpa Børgesen, 1934 (unaccepted)
  » Species Polysiphonia gorgoniae Harvey, 1853 accepted as Melanothamnus gorgoniae (Harvey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia grateloupeoides Noda, 1970 accepted as Neosiphonia japonica (Harvey) M.-S.Kim & I.K.Lee, 1999 (unaccepted)
  » Species Polysiphonia grevillei Harvey, 1841 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
    » Subspecies Polysiphonia grevillei subsp. incompta De Notaris, 1846 (uncertain, uncertain taxonomic status subjected to verification)
  » Species Polysiphonia griffithsiana Harvey, 1841 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia grisea Kützing, 1843 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012 (unaccepted)
  » Species Polysiphonia gunniana Harvey, 1844 accepted as Heterosiphonia gunniana (Harvey) Reinbold, 1899 (unaccepted)
  » Species Polysiphonia haematites Kützing, 1843 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia hakodatensis Yendo, 1920 accepted as Vertebrata stimpsonii (Harvey) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia hancockii E.Y.Dawson, 1944 accepted as Melanothamnus hancockii (E.Y.Dawson) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia harlandii Harvey, 1860 accepted as Melanothamnus harlandii (Harvey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia harveyi Bailey, 1848 accepted as Melanothamnus harveyi (Bailey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia hawaiiensis Hollenberg, 1968 accepted as Melanothamnus hawaiiensis (Hollenberg) Díaz-Tapia & Maggs, 2017 (unaccepted, synonym)
  » Species Polysiphonia hemispaerica Areschoug, 1875 accepted as Polysiphonia hemisphaerica Areschoug, 1875 (unaccepted, misspelling)
  » Species Polysiphonia hendryi N.L.Gardner, 1927 accepted as Vertebrata hendryi (N.L.Gardner) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia heringii Harvey, 1847 accepted as Herposiphonia heringii (Harvey) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia heteroclada J.Agardh, 1885 accepted as Dipterosiphonia dendritica (C.Agardh) F.Schmitz, 1897 (unaccepted)
  » Species Polysiphonia hillebrandii Bornet, 1883 accepted as Asparagopsis taxiformis (Delile) Trevisan de Saint-Léon, 1845 (unaccepted)
  » Species Polysiphonia hookeri Harvey, 1847 accepted as Echinothamnion hookeri (Harvey) Kylin ex P.C.Silva, 1996 (unaccepted)
  » Species Polysiphonia howei Hollenberg, 1945 accepted as Wilsonosiphonia howei (Hollenberg) D.Bustamante, Won & T.O.Cho, 2017 (unaccepted)
  » Species Polysiphonia humilis Kützing, 1849 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956 (unaccepted)
  » Species Polysiphonia hypnoides Welwitsch ex J.Agardh, 1863 accepted as Vertebrata hypnoides (Welwitsch) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia hystrix J.D.Hooker & Harvey, 1847 accepted as Echinothamnion hystrix (J.D.Hooker & Harvey) Kylin, 1956 (unaccepted)
  » Species Polysiphonia impolita Zanardini accepted as Polysiphonia subulata (Ducluzeau) Kützing, 1863 (unaccepted)
  » Species Polysiphonia incompta Harvey, 1847 accepted as Melanothamnus incomptus (Harvey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia inconspicua Reinsch, 1888 accepted as Colacodasya inconspicua (Reinsch) F.Schmitz, 1897 (unaccepted)
  » Species Polysiphonia inconspicua Hollenberg, 1944 accepted as Polysiphonia confusa Hollenberg, 1961 (unaccepted)
  » Species Polysiphonia incurva Zanardini accepted as Polysiphonia subulifera (C.Agardh) Harvey, 1834 (unaccepted)
  » Species Polysiphonia inflata G.Martens, 1866 accepted as Tolypiocladia glomerulata (C.Agardh) F.Schmitz, 1897 (unaccepted)
  » Species Polysiphonia insidiosa Greville ex J.Agardh, 1863 accepted as Herposiphonia insidiosa (Greville ex J.Agardh) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia insidiosa (J.Agardh) P.Crouan & H.Crouan, 1867 accepted as Neosiphonia harveyi (Bailey) M.-S.Kim, H.-G.Choi, Guiry & G.W.Saunders, 2001 (unaccepted, synonym)
  » Species Polysiphonia intricata (C.Agardh) J.Agardh, 1842 accepted as Polysiphonia obscura (C.Agardh) J.Agardh, 1842 (unaccepted, synonym)
  » Species Polysiphonia inversa Sonder, 1845 accepted as Dasyclonium incisum (J.Agardh) Kylin, 1956 (unaccepted)
  » Species Polysiphonia japonica Harvey, 1857 accepted as Melanothamnus japonicus (Harvey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia javanica G.Martens, 1866 accepted as Pterosiphonia javanica (G.Martens) De Toni, 1903 (unaccepted)
  » Species Polysiphonia johnstonii Setchell & Gardner, 1924 accepted as Melanothamnus johnstonii (Setchell & N.L.Gardner) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia kellneri Zanardini accepted as Polysiphonia sanguinea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia laevigata Kützing, 1843 accepted as Polysiphonia furcellata (C.Agardh) Harvey, 1833 (unaccepted)
  » Species Polysiphonia lanosa (Linnaeus) Tandy, 1931 accepted as Vertebrata lanosa (Linnaeus) T.A.Christensen, 1967 (unaccepted)
  » Species Polysiphonia latiovalis Noda, 1975 accepted as Neosiphonia yendoi (Segi) M.-S.Kim & I.K.Lee, 1999 (unaccepted)
  » Species Polysiphonia lawrenciana Harvey, 1844 accepted as Heterosiphonia lawrenciana (Harvey) Parsons, 1975 (unaccepted)
  » Species Polysiphonia laxa Kützing, 1843 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia laxa Harvey, 1859 accepted as Vertebrata agardhiana Kuntze, 1891 (unaccepted)
  » Species Polysiphonia laxiuscula Meneghini, 1849 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia lepadicola (Lyngbye) Sprengel, 1827 accepted as Polysiphonia urceolata f. lepadicola (Lyngbye) Segi, 1951 (unaccepted, synonym)
  » Species Polysiphonia leptoclonia Zanardini ex A.De Toni, 1907 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia leptura Kützing, 1843 accepted as Carradoriella denudata (Dillwyn) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia lithophila Kützing accepted as Polysiphonia subulata (Ducluzeau) Kützing, 1863 (unaccepted, synonym)
  » Species Polysiphonia lobophoralis Mamoozadeh & Freshwater, 2012 accepted as Vertebrata lobophoralis (Mamoozadeh & Freshwater) Freshwater, 2017 (unaccepted)
  » Species Polysiphonia longiarticulata Zanardini accepted as Polysiphonia sanguinea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia longissima J.Agardh, 1896 accepted as Doxodasya bolbochaete (Harvey) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia lophoclados (Montagne) Kützing, 1847 accepted as Lophocladia trichoclados (C.Agardh) F.Schmitz, 1893 (unaccepted)
  » Species Polysiphonia lutensis Zanardini accepted as Polysiphonia arachnoidea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia lyallii J.D.Hooker & Harvey, 1845 accepted as Echinothamnion lyallii (J.D.Hooker & Harvey) Kylin ex P.C.Silva, 1996 (unaccepted)
  » Species Polysiphonia lyngbyei Kützing, 1843 accepted as Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 (unaccepted)
  » Species Polysiphonia macrarthra Zanardini, 1874 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012 (unaccepted)
  » Species Polysiphonia macrocarpa Harvey, 1836 accepted as Polysiphonia atlantica Kapraun & J.N.Norris, 1982 (unaccepted, synonym)
  » Species Polysiphonia macrocephala Zanardini, 1864 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia macroclonia Kützing, 1843 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia mallardiae (Harvey) Harvey, 1847 accepted as Echinothamnion mallardiae (Harvey) Kylin ex P.C.Silva, 1996 (unaccepted)
  » Species Polysiphonia martensiana Kützing, 1843 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956 (unaccepted)
  » Species Polysiphonia masonii Setchell & N.L.Gardner, 1930 accepted as Melanothamnus masonii (Setchell & N.L.Gardner) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia megarthra Zanardini ex De Toni, 1907 accepted as Polysiphonia sanguinea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia melagonium Meneghini, 1844 accepted as Polysiphonia arachnoidea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia melanochroa Kützing, 1849 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia micracantha Zanardini ex A.De Toni, 1907 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia microcarpa J.D.Hooker & Harvey, 1845 accepted as Polysiphonia abscissa J.D.Hooker & Harvey, 1845 (unaccepted)
  » Species Polysiphonia microdendron J.Agardh, 1841 accepted as Polysiphonia elongata (Hudson) Sprengel, 1827 (unaccepted, synonym)
  » Species Polysiphonia miniata (C.Agardh) Kützing, 1849 accepted as Platysiphonia delicata (Clemente) Cremades, 1990 (unaccepted)
  » Species Polysiphonia minutissima Hollenberg, 1942 accepted as Melanothamnus minutissimus (Hollenberg) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia moestingi (Lyngbye) Sprengel, 1827 accepted as Polysiphonia moestingii (Lyngbye) Sprengel, 1827 (unaccepted)
  » Species Polysiphonia moestingii (Lyngbye) Sprengel, 1827 accepted as Symphyocladiella parasitica (Hudson) D.Bustamante, B.Y.Won, S.C.Lindstrom & T.O.Cho, 2019 (unaccepted)
  » Species Polysiphonia monilifera J.D.Hooker & Harvey, 1847 accepted as Herposiphonia monilifera (Hooker & Harvey) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia monocarpa Montagne, 1842 accepted as Placophora monocarpa (Montagne) Papenfuss, 1956 (unaccepted)
  » Species Polysiphonia montagnei De Notaris, 1841 accepted as Polysiphonia subulata (Ducluzeau) Kützing, 1863 (unaccepted)
  » Species Polysiphonia moritziana Sonder ex Kützing, 1849 accepted as Bostrychia moritziana (Sonder ex Kützing) J.Agardh, 1863 (unaccepted)
  » Species Polysiphonia morroides B.Kim & M.S.Kim, 2014 accepted as Kapraunia morroides (B.Kim & M.S.Kim) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia muelleriana J.Agardh, 1870 accepted as Streblocladia muelleriana (J.Agardh) L.E.Phillips, Hommersand, N.M.Adams & W.A.Nelson, 2009 (unaccepted)
  » Species Polysiphonia multicapsularis Zanardini accepted as Polysiphonia subulata (Ducluzeau) Kützing, 1863 (unaccepted)
  » Species Polysiphonia mutabilis Harvey, 1855 accepted as Platysiphonia mutabilis (Harvey) Womersley & Shepley, 1959 (unaccepted)
  » Species Polysiphonia myriococca Montagne, 1841 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia nana Kützing, 1849 accepted as Taenioma nanum (Kützing) Papenfuss, 1952 (unaccepted)
  » Species Polysiphonia neglecta Harvey ex J.Agardh, 1863 accepted as Polysiphonia isogona Harvey, 1855 (unaccepted)
  » Species Polysiphonia nigra (Hudson) Batters, 1902 accepted as Vertebrata nigra (Hudson) Díaz-Tapia & Maggs, 2017 (unaccepted, synonym)
  » Species Polysiphonia nigrescens (Hudson) Greville ex Harvey, 1833 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (unaccepted, synonym)
    » Forma Polysiphonia nigrescens f. fucoides Harvey, 1852
    » Forma Polysiphonia nigrescens f. affinis (Moore) J.Agardh, 1863 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (synonym)
    » Forma Polysiphonia nigrescens f. flaccida (Areschoug) Kylin, 1907 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891
    » Forma Polysiphonia nigrescens f. fucoides J.Agardh, 1863 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891
    » Forma Polysiphonia nigrescens f. pectinata (C.Agardh) J.Agardh, 1863 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891
    » Forma Polysiphonia nigrescens f. protensa J.Agardh, 1863 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891
    » Forma Polysiphonia nigrescens f. senticosa (Kützing) J.Agardh, 1863 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891
    » Variety Polysiphonia nigrescens var. affinis (Moore) Harvey, 1853 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (synonym)
    » Variety Polysiphonia nigrescens var. flaccida Areschoug, 1847 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891
    » Variety Polysiphonia nigrescens var. fucoides (Hudson) Harvey, 1853 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (synonym)
  » Species Polysiphonia nigrita Sonder, 1845 accepted as Polysiphonia decipiens Montagne, 1842 (unaccepted)
  » Species Polysiphonia nipponica Segi, 1951 accepted as Neosiphonia japonica (Harvey) M.-S.Kim & I.K.Lee, 1999 (unaccepted)
  » Species Polysiphonia notoensis Segi, 1951 accepted as Melanothamnus notoensis (Segi) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia nova-angliae W.R.Taylor accepted as Neosiphonia harveyi (Bailey) M.-S.Kim, H.-G.Choi, Guiry & G.W.Saunders, 2001 (unaccepted)
  » Species Polysiphonia novae-angliae W.R.Taylor, 1937 accepted as Melanothamnus harveyi (Bailey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia nuda Mamoozadeh & Freshwater, 2012 accepted as Melanothamnus nudus (Mamoozadeh & Freshwater) Freshwater, 2017 (unaccepted)
  » Species Polysiphonia nutans Montagne, 1841 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia obscura (C.Agardh) J.Agardh, 1842 accepted as Lophosiphonia obscura (C.Agardh) Falkenberg, 1897 (unaccepted, synonym)
  » Species Polysiphonia obscura Harvey, 1855 accepted as Ophidocladus simpliciusculus (P.Crouan & H.Crouan) Falkenberg, 1897 (unaccepted)
  » Species Polysiphonia obsoleta Segi, 1951 accepted as Neosiphonia yendoi (Segi) M.-S.Kim & I.K.Lee, 1999 (unaccepted)
  » Species Polysiphonia ohmaensis Ohta, 1973 accepted as Enelittosiphonia stimpsonii (Harvey) Kudo & Masuda, 1995 (unaccepted)
  » Species Polysiphonia olneyi Harvey, 1851 accepted as Neosiphonia harveyi var. olneyi (Harvey) A.C.Mathieson & Dawes, 2017 (unaccepted, synonym)
  » Species Polysiphonia ophiocarpa Kützing, 1843 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia parasitica (Hudson) Greville, 1824 accepted as Symphyocladiella parasitica (Hudson) D.Bustamante, B.Y.Won, S.C.Lindstrom & T.O.Cho, 2019 (unaccepted)
  » Species Polysiphonia parvula Zanardini, 1847 accepted as Lophosiphonia obscura (C.Agardh) Falkenberg, 1897 (unaccepted)
  » Species Polysiphonia patens (Dillwyn) Harvey, 1833 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (unaccepted)
  » Species Polysiphonia patersonis Sonder, 1855 accepted as Diplocladia patersonis (Sonder) Kylin, 1956 (unaccepted)
  » Species Polysiphonia pauperula Kützing, 1863 accepted as Bostrychia moritziana (Sonder ex Kützing) J.Agardh, 1863 (unaccepted)
  » Species Polysiphonia pecten J.E. Areschoug, 1854 accepted as Dasyclonium incisum (J.Agardh) Kylin, 1956 (unaccepted)
  » Species Polysiphonia pecten-veneris Harvey, 1853 accepted as Herposiphonia pecten-veneris (Harvey) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia pectinata J.D.Hooker & Harvey, 1845 accepted as Picconiella pectinata (J.D.Hooker & Harvey) De Toni fil., 1936 (unaccepted)
  » Species Polysiphonia pectinata Harvey ex Kützing, 1864 accepted as Herposiphonia pectinata (Harvey) Falkenberg, 1901 (unaccepted, synonym)
  » Species Polysiphonia pectinella Harvey, 1855 accepted as Herposiphonia pectinata (Harvey) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia penicillata (C.Agardh) Sprengel, 1827 accepted as Leptosiphonia brodiei (Dillwyn) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia pennata (C.Agardh) J.Agardh, 1842 accepted as Xiphosiphonia pennata (C.Agardh) Savoie & G.W.Saunders, 2016 (unaccepted)
  » Species Polysiphonia pentamera Hollenberg, 1968 accepted as Kapraunia pentamera (Hollenberg) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia perpusilla J.Agardh, 1847 accepted as Taenioma perpusillum (J.Agardh) J.Agardh, 1863 (unaccepted)
  » Species Polysiphonia perreymondii J.Agardh, 1842 accepted as Polysiphonia subulata (Ducluzeau) Kützing, 1863 (unaccepted, synonym)
  » Species Polysiphonia phleborhiza Kützing, 1849 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia physartra Kützing, 1849 accepted as Polysiphonia breviarticulata (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia piligera Zanardini ex De Toni, 1907 accepted as Polysiphonia ornata J.Agardh, 1842 (unaccepted)
  » Species Polysiphonia pinnulata Kützing, 1843 accepted as Pterosiphonia pinnulata (Kützing) Maggs & Hommersand, 1993 (unaccepted)
  » Species Polysiphonia platycarpa Børgesen, 1934 accepted as Melanothamnus platycarpus (Børgesen) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia plumula J.Agardh, 1885 accepted as Herposiphonia plumula (J.Agardh) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia poko Hollenberg, 1968 accepted as Neosiphonia poko (Hollenberg) I.A.Abbott, 2002 (unaccepted)
  » Species Polysiphonia polymorpha (Linnaeus) Duby, 1830 accepted as Ceramium virgatum Roth, 1797 (unaccepted, synonym)
  » Species Polysiphonia polymorpha Montagne, 1843 accepted as Polysiphonia curta Montagne, 1843 (unaccepted, synonym)
  » Species Polysiphonia polyphora Kützing, 1849 accepted as Echinothamnion hystrix (J.D.Hooker & Harvey) Kylin, 1956 (unaccepted)
  » Species Polysiphonia polyphysa Kützing, 1863 accepted as Melanothamnus polyphysus (Kützing) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia porrecta T.Segi, 1951 accepted as Melanothamnus porrectus (T.Segi) Díaz-Tapia & Maggs, 2017 (unaccepted, synonym)
  » Species Polysiphonia prorepens Harvey, 1847 accepted as Herposiphonia prorepens (Harvey) F.Schmitz, 1895 (unaccepted)
  » Species Polysiphonia prostrata Harvey, 1855 accepted as Epizonaria prostrata (Harvey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia pseudovillum Hollenberg, 1968 accepted as Melanothamnus pseudovillum (Hollenberg) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia pulvinata Liebmann, 1845 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (unaccepted)
  » Species Polysiphonia pungens Hollenberg, 1942 accepted as Polysiphonia senticulosa Harvey, 1862 (unaccepted)
  » Species Polysiphonia punicea Montagne, 1842 accepted as Heterosiphonia punicea (Montagne) Kylin, 1919 (unaccepted)
  » Species Polysiphonia purpurata Zanardini ex De Toni, 1907 accepted as Polysiphonia sertularioides (Grateloup) J.Agardh, 1863 (unaccepted)
  » Species Polysiphonia purpurea (C.Agardh) J.Agardh, 1842 accepted as Polysiphonia sanguinea (C.Agardh) Zanardini, 1840 (unaccepted, synonym)
  » Species Polysiphonia purpurea Postels & Ruprecht, 1840 accepted as Polysiphonia porphyroides Kützing, 1849 (unaccepted, synonym)
  » Species Polysiphonia pycnocoma Kützing, 1849 accepted as Polysiphonia sanguinea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia pycnophloea Kützing, 1849 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956 (unaccepted)
  » Species Polysiphonia ramellosa Kützing, 1843 accepted as Polysiphonia subulifera (C.Agardh) Harvey, 1834 (unaccepted)
  » Species Polysiphonia ramulosa (C.Agardh) Sprengel, 1827 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia repens Kützing, 1843 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia reptabunda (Suhr) Kützing, 1843 accepted as Lophosiphonia reptabunda (Suhr) Kylin, 1956 (unaccepted)
  » Species Polysiphonia rhizoidea Meñez, 1964 accepted as Wilsonosiphonia howei (Hollenberg) D.Bustamante, Won & T.O.Cho, 2017 (unaccepted, synonym)
  » Species Polysiphonia rhododactyla Harvey, 1855 accepted as Streblocladia rhododactyla (Harvey) D'Archino, B.Kim & M.S.Kim, 2018 (unaccepted)
  » Species Polysiphonia rhodomeloides Kützing, 1847 accepted as Streblocladia glomerulata (Montagne) Papenfuss, 1964 (unaccepted)
  » Species Polysiphonia richardsonii W.J.Hooker ex Harvey, 1833 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia robusta Kützing, 1843 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia robusta N.L.Gardner, 1927 accepted as Savoiea bipinnata (Postels & Ruprecht) M.J.Wynne, 2018 (unaccepted)
  » Species Polysiphonia roeana Harvey, 1855 accepted as Malaconema roeanum (Harvey) Womersley & Shepley, 1959 (unaccepted)
  » Species Polysiphonia rosea Greville, 1824 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia roseola (C.Agardh) Fries, 1835 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (unaccepted)
  » Species Polysiphonia rostrata Sonder, 1845 accepted as Herposiphonia rostrata (Sonder) Reinbold, 1899 (unaccepted)
  » Species Polysiphonia ruchingeri (C.Agardh) Zanardini, 1841 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia rufolanosa Harvey, 1855 accepted as Asparagopsis armata Harvey, 1855 (unaccepted, synonym)
  » Species Polysiphonia rytiphlaeoides J.D.Hooker & Harvey, 1845 accepted as Polysiphonia decipiens Montagne, 1842 (unaccepted)
  » Species Polysiphonia sabulosa B.Kim & M.S.Kim, 2014 accepted as Eutrichosiphonia sabulosa (B.Kim & M.S.Kim) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia sanguinea (C.Agardh) J.Agardh, 1842 accepted as Polysiphonia sanguinea (C.Agardh) Zanardini, 1840 (unaccepted)
  » Species Polysiphonia savatieri Hariot, 1891 accepted as Melanothamnus savatieri (Hariot) Díaz-Tapia & Maggs, 2017 (unaccepted, synonym)
  » Species Polysiphonia schneideri B.Stuercke & D.W.Freshwater, 2010 accepted as Kapraunia schneideri (Stuercke & Freshwater) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia schousboei Thuret, 1876 accepted as Leptosiphonia schousboei (Thuret) Kylin, 1956 (unaccepted)
  » Species Polysiphonia schuebeleri Foslie, 1881 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia scoparia Kützing, 1843 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia secunda (C.Agardh) Zanardini, 1840 accepted as Herposiphonia secunda (C.Agardh) Ambronn, 1880 (unaccepted)
  » Species Polysiphonia senticosa Suhr ex Kützing, 1849 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia sericea Hauck, 1877 accepted as Streblocladia collabens (C.Agardh) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia sertularioides (Grateloup) J.Agardh, 1863 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012 (unaccepted)
  » Species Polysiphonia setacea Hollenberg, 1968 accepted as Womersleyella setacea (Hollenberg) R.E.Norris, 1992 (unaccepted, synonym)
  » Species Polysiphonia simplex Hollenberg, 1942 accepted as Melanothamnus simplex (Hollenberg) Díaz-Tapia & Maggs, 2017 (unaccepted, synonym)
  » Species Polysiphonia simpliciuscula P.Crouan & H.Crouan, 1852 accepted as Ophidocladus simpliciusculus (P.Crouan & H.Crouan) Falkenberg, 1897 (unaccepted, synonym)
  » Species Polysiphonia simulans Harvey, 1849 accepted as Vertebrata simulans (Harvey) Kuntze, 1891 (unaccepted, synonym)
  » Species Polysiphonia siretokensis Yamada & Tanaka, 1944 accepted as Neosiphonia japonica (Harvey) M.-S.Kim & I.K.Lee, 1999 (unaccepted)
  » Species Polysiphonia snyderae Kylin, 1941 accepted as Melanothamnus eastwoodiae (Setchell & N.L.Gardner) Díaz-Tapia & Maggs, 2017 (unaccepted)
    » Variety Polysiphonia snyderae var. heteromorpha G.J.Hollenberg, 1942 (uncertain, uncertain taxonomic status subjected to verification)
    » Variety Polysiphonia snyderae var. intricata Hollenberg, 1942 (uncertain)
  » Species Polysiphonia solierii J.Agardh, 1842 accepted as Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 (unaccepted)
  » Species Polysiphonia sparsa (Setchell) Hollenberg, 1968 accepted as Melanothamnus sparsus (Setchell) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia sphaerocarpa Børgesen, 1918 accepted as Neosiphonia sphaerocarpa (Børgesen) M.-S.Kim & I.K.Lee, 1999 (unaccepted, synonym)
  » Species Polysiphonia spiculifera Zanardini ex Kützing, 1864 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia spinifera Kützing, 1843 accepted as Symphyocladiella spinifera (Kützing) D.Bustamante, B.Y.Won, S.C.Lindstrom & T.O.Cho, 2019 (unaccepted)
  » Species Polysiphonia spinosissima Harvey, 1859 accepted as Diplocladia patersonis (Sonder) Kylin, 1956 (unaccepted)
  » Species Polysiphonia spinuligera Zanardini, 1874 accepted as Polysiphonia succulenta Harvey, 1859 (unaccepted)
  » Species Polysiphonia spinulosa Greville, 1823 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia spiralis L.Batten, 1923 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (unaccepted, synonym)
  » Species Polysiphonia squarrosa Kützing, 1849 accepted as Heterosiphonia berkeleyi Montagne, 1842 (unaccepted)
  » Species Polysiphonia stangeri J.Agardh, 1863 accepted as Pterosiphonia stangeri (J.Agardh) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia stenocarpa Kützing, 1849 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia stichidiosa Funk, 1955 accepted as Aphanocladia stichidiosa (Funk) Ardré, 1970 (unaccepted)
  » Species Polysiphonia stimpsonii Harvey, 1859 accepted as Vertebrata stimpsonii (Harvey) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia strictissima J.D.Hooker & Harvey, 1845 accepted as Melanothamnus strictissimus (J.D.Hooker & Harvey) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia strictoides (Lyngbye) Kützing accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted)
  » Species Polysiphonia subadunca Kützing, 1843 accepted as Lophosiphonia obscura (C.Agardh) Falkenberg, 1897 (unaccepted)
  » Species Polysiphonia subcontinua (C.Agardh) J.Agardh, 1842 accepted as Polysiphonia flocculosa (C.Agardh) Endlichter, 1843 (unaccepted, synonym)
  » Species Polysiphonia subtilis Kützing, 1843 accepted as Polysiphonia pygmaea Kützing, 1845 (unaccepted, synonym)
  » Species Polysiphonia subulifera (C.Agardh) Harvey, 1834 accepted as Vertebrata subulifera (C.Agardh) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia sulivanae J.D.Hooker & Harvey, 1847 accepted as Herposiphonia sulivanae (J.D.Hooker & Harvey) Falkenberg, 1901 (unaccepted)
  » Species Polysiphonia tasmanica (Sonder) J.Agardh, 1863 accepted as Pityophykos tasmanica (Sonder) Papenfuss, 1958 (unaccepted)
  » Species Polysiphonia taylorii Hollenberg ex Williams, 1949 accepted as Neosiphonia tepida (Hollenberg) S.M.Guimarães & M.T.Fujii, 2004 (unaccepted, synonym)
  » Species Polysiphonia teges Womersley, 1979 accepted as Lophosiphonia teges (Womersley) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia tenebrosa Harvey, 1847 accepted as Tayloriella tenebrosa (Harvey) Kylin, 1938 (unaccepted)
  » Species Polysiphonia tenella (C.Agardh) Moris & De Notaris, 1839 accepted as Herposiphonia tenella (C.Agardh) Ambronn, 1880 (unaccepted, synonym)
  » Species Polysiphonia tenuis Hollenberg, 1968 accepted as Polysiphonia triton P.C.Silva, 1987 (unaccepted)
  » Species Polysiphonia tenuis (C.Agardh) E.M.Fries, 1836 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia tepida Hollenberg, 1958 accepted as Polysiphonia foetidissima Cocks ex Bornet, 1892 (unaccepted, synonym)
  » Species Polysiphonia teradomariensis M.Noda, 1971 accepted as Melanothamnus teradomariensis (M.Noda) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia thuyoides Harvey, 1836 accepted as Vertebrata thuyoides (Harvey) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia thwaitesii Harvey ex J.Agardh, 1863 accepted as Bryocladia thwaitesii (Harvey ex J.Agardh) De Toni, 1903 (unaccepted)
  » Species Polysiphonia thyrsigera J.Agardh, 1847 accepted as Bryocladia thyrsigera (J.Agardh) F.Schmitz, 1901 (unaccepted)
  » Species Polysiphonia tongatensis Harvey ex Kützing, 1864 accepted as Neosiphonia tongatensis (Harvey ex Kützing) M.-S.Kim & I.K.Lee, 1999 (unaccepted)
  » Species Polysiphonia trichodes Kützing, 1843 accepted as Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia tripinnata J.Agardh, 1842 accepted as Vertebrata tripinnata (Harvey) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia umbellifera Kützing, 1843 accepted as Polysiphonia opaca (C.Agardh) Moris & De Notaris, 1839 (unaccepted)
  » Species Polysiphonia upolensis Grunow, 1874 accepted as Neosiphonia upolensis (Grunow) M.S.Kim & Boo, 2008 (unaccepted, synonym)
  » Species Polysiphonia urbana Harvey, 1847 accepted as Vertebrata urbana (Harvey) Kuntze, 1891 (unaccepted)
  » Species Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville, 1824 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (unaccepted, synonym)
    » Forma Polysiphonia urceolata f. lepadicola (Lyngbye) Segi, 1951
    » Forma Polysiphonia urceolata f. patens (Dillwyn) J.Agardh, 1863
    » Forma Polysiphonia urceolata f. comosa (C.Agardh) J.Agardh, 1863 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824
    » Forma Polysiphonia urceolata f. formosa (Suhr) J.Agardh, 1863 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824
    » Forma Polysiphonia urceolata f. fucoides (Hudson) J.Agardh, 1863 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (synonym)
    » Forma Polysiphonia urceolata f. pulvinata (Roth) Kylin, 1944 accepted as Polysiphonia pulvinata (Roth) Sprengel, 1827
    » Forma Polysiphonia urceolata f. pulvinata Kylin, 1907 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824
    » Forma Polysiphonia urceolata f. pulvinata (Roth) Kylin, 1907 accepted as Polysiphonia pulvinata (Roth) Sprengel, 1827 (synonym)
    » Forma Polysiphonia urceolata f. roseola (C.Agardh) J.Agardh, 1863 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (synonym)
    » Forma Polysiphonia urceolata f. roseola (C.Agardh) J.Agardh, 1863 accepted as Polysiphonia stricta (Mertens ex Dillwyn) Greville, 1824 (synonym)
    » Forma Polysiphonia urceolata f. typica Kjellman, 1883 accepted as Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville, 1824
  » Species Polysiphonia vagabunda Harvey, 1859 accepted as Asparagopsis armata Harvey, 1855 (unaccepted, synonym)
  » Species Polysiphonia valida J.Agardh, 1896 accepted as Chiracanthia arborea (Harvey) Falkenberg, 1897 (unaccepted)
  » Species Polysiphonia variegata (C.Agardh) J.Agardh, 1842 accepted as Polysiphonia denudata (Dillwyn) Greville ex Harvey, 1833 (unaccepted)
  » Species Polysiphonia versicolor J.D.Hooker & Harvey, 1847 accepted as Herposiphonia versicolor (Hooker & Harvey) Reinbold, 1899 (unaccepted)
  » Species Polysiphonia verticillata Harvey, 1833 accepted as Herposiphonia verticillata (Harvey) Kylin, 1925 (unaccepted)
  » Species Polysiphonia vestita J.Agardh, 1842 accepted as Polysiphonia arachnoidea (C.Agardh) Zanardini, 1840 (unaccepted, synonym)
  » Species Polysiphonia victoriae (Harvey) Kützing, 1864 accepted as Platysiphonia victoriae (Harvey ex J.Agardh) Womersley & Shepley, 1959 (unaccepted)
  » Species Polysiphonia vidovichii Meneghini ex Kützing, 1845 accepted as Carradoriella denudata (Dillwyn) A.M.Savoie & G.W.Saunders, 2019 (unaccepted, synonym)
  » Species Polysiphonia violacea (Roth) Sprengel, 1827 accepted as Vertebrata fucoides (Hudson) Kuntze, 1891 (unaccepted, synonym)
    » Variety Polysiphonia violacea var. griffithsiana L.Batten, 1923
    » Variety Polysiphonia violacea var. tenuissima Hauck
    » Forma Polysiphonia violacea f. aculeata (C.Agardh) Rosenvinge, 1924 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
    » Forma Polysiphonia violacea f. bulbosa (Suhr ex Areschoug) Kylin, 1907 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
    » Forma Polysiphonia violacea f. fibrillosa (C.Agardh) Rosenvinge, 1924 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
    » Forma Polysiphonia violacea f. subbrodiei (Areschoug) Kylin, 1907 accepted as Polysiphonia fibrillosa (C.Agardh) Sprengel, 1827
    » Forma Polysiphonia violacea f. subulata (Ducluzeau) Hauck accepted as Polysiphonia subulata (Ducluzeau) Kützing, 1863
    » Forma Polysiphonia violacea f. tenuis (Roth) Rosenvinge, 1924 accepted as Polysiphonia fibrillosa (C.Agardh) Sprengel, 1827
    » Variety Polysiphonia violacea var. bulbosa Suhr ex Areschoug, 1847 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
    » Variety Polysiphonia violacea var. fibrillosa (C.Agardh) Areschoug, 1847 accepted as Leptosiphonia fibrata (C.Agardh) A.M.Savoie & G.W.Saunders, 2019
    » Variety Polysiphonia violacea var. flexicaulis Harvey, 1853 accepted as Leptosiphonia flexicaulis (Harvey) A.M.Savoie & G.W.Saunders, 2019 (synonym)
    » Variety Polysiphonia violacea var. subbrodiei Areschoug, 1847 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
    » Variety Polysiphonia violacea var. subulata (Ducluzeau) L.Batten accepted as Polysiphonia subulata (Ducluzeau) Kützing, 1863
    » Variety Polysiphonia violacea var. tenuissima Areschoug, 1847 accepted as Leptosiphonia fibrillosa (Agardh) A.M.Savoie & G.W.Saunders, 2019
  » Species Polysiphonia virgata (C.Agardh) Sprengel, 1827 accepted as Carradoriella virgata (C.Agardh) P.C.Silva, 1996 (unaccepted)
  » Species Polysiphonia woodii Harvey, 1853 accepted as Pterochondria woodii (Harvey) Hollenberg, 1942 (unaccepted)
  » Species Polysiphonia wulfenii (Roth) J.Agardh, 1842 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956 (unaccepted)
  » Species Polysiphonia yendoi T.Segi, 1951 accepted as Melanothamnus yendoi (T.Segi) Díaz-Tapia & Maggs, 2017 (unaccepted)
  » Species Polysiphonia yonakuniensis Segi, 1951 accepted as Polysiphonia howei Hollenberg, 1945 (unaccepted, synonym)
  » Species Polysiphonia zostericola Lucas, 1919 accepted as Polysiphonia infestans Harvey, 1855 (unaccepted)
  » Species Polysiphonia adriatica Schiffner, 1931
  » Species Polysiphonia adscendens Meneghini, 1844
  » Species Polysiphonia adscendens (Bonnemaison) P.Crouan & H.Crouan
  » Species Polysiphonia americana Reinsch
  » Species Polysiphonia amethystea Kützing
  » Species Polysiphonia aspera Zanardini ex A.De Toni, 1907
  » Species Polysiphonia attenuata Zanardini ex A.De Toni, 1907
  » Species Polysiphonia bellula De Notaris
  » Species Polysiphonia bicornis Sonder, 1880
  » Species Polysiphonia brachygona Harvey, 1855
  » Species Polysiphonia calliptera Kützing
  » Species Polysiphonia callitricha Kützing
  » Species Polysiphonia capillata De Notaris
  » Species Polysiphonia caulescens J.Agardh
  » Species Polysiphonia chlamydopteris Zanardini
  » Species Polysiphonia chlamydopteris Meneghini ex A.De Toni, 1907
  » Species Polysiphonia codiicola Zanardini
  » Species Polysiphonia dasiiformis Zanardini, 1843
  » Species Polysiphonia davisii J.D.Hooker & Harvey
  » Species Polysiphonia dichocephala Kützing
  » Species Polysiphonia dichotoma Zanardini ex A.De Toni, 1907 (uncertain taxonomic status subjected to verification)
  » Species Polysiphonia diffusa (Hudson) Jones & Kingston
  » Species Polysiphonia discolor (Agardh) Sprengel
  » Species Polysiphonia episcopalis Zanardini ex A.De Toni, 1907
  » Species Polysiphonia expansa Zanardini, 1864 (uncertain taxonomic status subjected to verification)
  » Species Polysiphonia floccosa Zanardini, 1843
  » Species Polysiphonia furcata Meneghini ex A.De Toni, 1907
  » Species Polysiphonia gelidii Zanardini, 1874
  » Species Polysiphonia gibbesii Harvey
  » Species Polysiphonia guadalupens Setchell & Gardner
  » Species Polysiphonia guernisaci (P.L.Crouan & H.M.Crouan) J.Agardh
  » Species Polysiphonia hamulifera Kützing
  » Species Polysiphonia hispida Zanardini, 1864
  » Species Polysiphonia incompta De Notaris, 1846
  » Species Polysiphonia insignis P.L.Crouan & H.M.Crouan
  » Species Polysiphonia juncea Kützing
  » Species Polysiphonia lasiorhiza Kützing
  » Species Polysiphonia lasiotricha Kützing
  » Species Polysiphonia leptoclada (Montagne) Kützing, 1864
  » Species Polysiphonia mucosa P.L.Crouan & H.M.Crouan
  » Species Polysiphonia multifida Duby
  » Species Polysiphonia multifida Kützing
  » Species Polysiphonia nemalii Zanardini, 1843
  » Species Polysiphonia pappeana Kützing
  » Species Polysiphonia patula Kützing
  » Species Polysiphonia physarthra (Kützing) Kützing
  » Species Polysiphonia polycephala Zanardini ex De Toni, 1907
  » Species Polysiphonia pulchella De Notaris
  » Species Polysiphonia radicans (Meneghini) J.Agardh
  » Species Polysiphonia regularis Kützing
  » Species Polysiphonia rytiphloeoides J.D.Hooker & Harvey
  » Species Polysiphonia sanctipetri Collins
  » Species Polysiphonia secundata (Suhr) Kützing
  » Species Polysiphonia sentosa Kützing
  » Species Polysiphonia tenera Harvey
  » Species Polysiphonia tenuissima De Notaris
  » Species Polysiphonia tommasiniana Bertoloni, 1867 (uncertain taxonomic status subjected to verification)
  » Species Polysiphonia trichoclada Kützing
  » Species Polysiphonia variegata (Sperk) Voronikhj, 1909 (synonym)
  » Species Polysiphonia veneta Zanardini, 1847
  » Species Polysiphonia violascens Kützing
  » Species Polysiphonia virens Kützing
  » Species Polysiphonia vulpina De Notaris
  » Species Polysiphonia yokoskensis Hariot
Genus Symphyocolax M.S.Kim, 2010
Genus Tolypiocladia F.Schmitz, 1897
Genus Womersleyella Hollenberg, 1967

Genus Carradoria Martius, 1833 accepted as Polysiphonia Greville, 1823 (synonym)
Genus Dawsoniella A.B.Joly & Yamaguishi-Tomita, 1967 accepted as Dawsoniocolax A.B.Joly & Yamaguishi-Tomita, 1970 (synonym)
Genus Falkenbergiella Kylin, 1938 accepted as Lophosiphonia Falkenberg, 1897 (synonym)
marine, fresh
Not documented
Guiry, M.D. & Guiry, G.M. (2021). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Polysiphonieae Schmitz, 1889. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=393561 on 2021-06-15
Date
action
by
2009-04-23 12:17:43Z
created
2011-02-01 09:36:25Z
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taxonomy source Díaz-Tapia, P.; McIvor, L.; Freshwater, D. W.; Verbruggen, H.; Wynne, M. J.; Maggs, C. A. (2017). The genera Melanothamnus Bornet & Falkenberg and Vertebrata S.F. Gray constitute well-defined clades of the red algal tribe Polysiphonieae (Rhodomelaceae, Ceramiales). <em>European Journal of Phycology.</em> 52(1): 1-30., available online at https://doi.org/10.1080/09670262.2016.1256436 [details]  Available for editors  PDF available [request] 

context source (Bermuda) Schneider, C. W. (2003). An annotated checklist and bibliography of the marine macroalgae of the Bermuda Islands. Nova Hedwigia, 76(3-4): 275-361 [details]   

basis of record Guiry, M.D. & Guiry, G.M. (2020). AlgaeBase. <em>World-wide electronic publication, National University of Ireland, Galway.</em> , available online at http://www.algaebase.org [details]