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 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) 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 gelidii Zanardini, 1874
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 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
Species Polysiphonia platyspira Kützing
Species Polysiphonia plectrocarpa C.W.Schneider, 1998
Species Polysiphonia poko Hollenberg, 1968
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
Species Polysiphonia senticulosa Harvey, 1862
Species Polysiphonia serpens (Dufour) De Notaris ex Ardissone
Species Polysiphonia sertularioides (Grateloup) J.Agardh, 1863
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 accepted as Polysiphonia sertularioides (Grateloup) J.Agardh, 1863
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) 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 accepted as Vertebrata reptabunda (Suhr) Díaz-Tapia & Maggs, 2017
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 accepted as Melanothamnus savatieri (Hariot) Díaz-Tapia & Maggs, 2017
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) 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 accepted as Melanothamnus tongatensis (Harvey ex Kützing) Díaz-Tapia & Maggs, 2017
Species Polysiphonia arborescens Kützing, 1843 accepted as Carradoriella elongata (Hudson) 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 accepted as Melanothamnus harveyi (Bailey) Díaz-Tapia & Maggs, 2017
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 accepted as Vertebrata subulifera (C.Agardh) Kuntze, 1891
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 accepted as Vertebrata nigra (Hudson) Díaz-Tapia & Maggs, 2017
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 accepted as Vertebrata australis (C.Agardh) Kuntze, 1891
Species Polysiphonia badia (Dillwyn) Sprengel, 1827 accepted as Polysiphonia nigra (Hudson) Batters, 1902 accepted as Vertebrata nigra (Hudson) Díaz-Tapia & Maggs, 2017
Species Polysiphonia badia Kützing, 1849 accepted as Neosiphonia sertularioides (Grateloup) K.W.Nam & P.J.Kang, 2012 accepted as Polysiphonia sertularioides (Grateloup) J.Agardh, 1863
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 accepted as Vertebrata byssoides (Goodenough & Woodward) Kuntze, 1891
Species Polysiphonia bangii (Kützing) Kützing, 1864 accepted as Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 accepted as Vertebrata byssoides (Goodenough & Woodward) Kuntze, 1891
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 accepted as 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 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 accepted as Leptosiphonia brodiei (Dillwyn) A.M.Savoie & G.W.Saunders, 2019
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) 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 accepted as Vertebrata australis (C.Agardh) Kuntze, 1891
Species Polysiphonia byssoides (Goodenough & Woodward) Greville, 1824 accepted as Brongniartella byssoides (Goodenough & Woodward) F.Schmitz, 1893 accepted as Vertebrata byssoides (Goodenough & Woodward) Kuntze, 1891
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 accepted as Eutrichosiphonia paniculata (Montagne) D.E.Bustamante & T.O.Cho, 2021
Species Polysiphonia callithamnion Sonder, 1845 accepted as Polysiphonia callithamnium Sonder, 1845 accepted as Heterosiphonia callithamnium (Sonder) Falkenberg, 1901
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) 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) 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 accepted as Vertebrata australis (C.Agardh) Kuntze, 1891
Species Polysiphonia clavigera Kützing, 1849 accepted as Carradoriella elongata (Hudson) 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 accepted as Vertebrata furcellata (C.Agardh) Kuntze, 1891
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) Savoie & G.W.Saunders, 2019
Species Polysiphonia comatula Kützing, 1849 accepted as Boergeseniella fruticulosa (Wulfen) Kylin, 1956 accepted as Vertebrata fruticulosa (Wulfen) Kuntze, 1891
Species Polysiphonia commutata Kützing, 1849 accepted as Carradoriella elongata (Hudson) 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 accepted as Vertebrata fruticulosa (Wulfen) Kuntze, 1891
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) 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 accepted as Vertebrata fruticulosa (Wulfen) Kuntze, 1891
Species Polysiphonia cystophyllicola Noda, 1975 accepted as Neosiphonia yendoi (Segi) M.S.Kim & I.K.Lee, 1999 accepted as Melanothamnus yendoi (T.Segi) Díaz-Tapia & Maggs, 2017
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) 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) 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 (unaccepted)
Species Polysiphonia disticha Zanardini, 1847 (unaccepted)
Species Polysiphonia divaricata (C.Agardh) Sprengel, 1827 (unaccepted)
Species Polysiphonia dysanophora Kützing, 1843 (unaccepted)
Species Polysiphonia eastwoodiae Setchell & N.L.Gardner, 1930 (unaccepted)
Species Polysiphonia echinata Harvey, 1853 (unaccepted)
Species Polysiphonia elongata (Hudson) Sprengel, 1827 (unaccepted)
Species Polysiphonia elongella Harvey, 1833 (unaccepted)
Species Polysiphonia ericoides Harvey, 1847 (unaccepted)
Species Polysiphonia erythrocoma Kützing, 1843 (unaccepted)
Species Polysiphonia expansa (C.Agardh) Endlichter, 1843 (unaccepted)
Species Polysiphonia falcata Kützing, 1863 (unaccepted)
Species Polysiphonia fasciculata Kützing, 1843 (unaccepted)
Species Polysiphonia fastigiata (Roth) Greville, 1824 (unaccepted, synonym)
Species Polysiphonia ferulacea Suhr ex J.Agardh, 1863 (unaccepted, synonym)
Species Polysiphonia ferulaceae Suhr. Ex J. Ag. (unaccepted, misspelling)
Species Polysiphonia fibrata (Dillwyn) Harvey, 1833 (unaccepted)
Species Polysiphonia fibrillosa (Dillwyn) J.Agardh, 1842 (unaccepted)
Species Polysiphonia fibrillosa (C.Agardh) Sprengel, 1827 (unaccepted)
Species Polysiphonia filamentosa (Wulfen) Sprengel, 1827 (unaccepted, synonym)
Species Polysiphonia filipendula Harvey ex J.Agardh, 1863 (unaccepted)
Species Polysiphonia flaccidissima Hollenberg, 1942 (unaccepted, synonym)
Species Polysiphonia flavescens Zanardini, 1874 (unaccepted)
Species Polysiphonia foetidissima Cocks ex Bornet, 1892 (unaccepted, synonym)
Species Polysiphonia forcipata Harvey, 1855 (unaccepted)
Species Polysiphonia forcipata J.Agardh, 1842 (unaccepted)
Species Polysiphonia formosa Suhr, 1831 (unaccepted, synonym)
Species Polysiphonia fracta Harvey, 1853 (unaccepted, synonym)
Species Polysiphonia fragilis Sperk [Shperk], 1869 (unaccepted, synonym)
Species Polysiphonia frutex Harvey, 1844 (unaccepted)
Species Polysiphonia fruticulosa (Wulfen) Sprengel, 1827 (unaccepted, synonym)
Species Polysiphonia fucoides (Hudson) Greville, 1824 (unaccepted, synonym)
Species Polysiphonia fuliginosa Rudolphi, 1831 (unaccepted)
Species Polysiphonia furcellata (C.Agardh) Harvey, 1833 (unaccepted, synonym)
Species Polysiphonia fuscescens Harvey, 1844 (unaccepted)
Species Polysiphonia gardneri Kylin, 1941 (unaccepted, synonym)
Species Polysiphonia glomerulata (C.Agardh) Sprengel, 1827 (unaccepted)
Species Polysiphonia gopnathensis Thivy & Sreenivasa Rao, 1963 (unaccepted)
Species Polysiphonia gorgoniae Harvey, 1853 (unaccepted)
Species Polysiphonia grateloupeoides Noda, 1970 (unaccepted)
Species Polysiphonia grevillei Harvey, 1841 (unaccepted)
Species Polysiphonia griffithsiana Harvey, 1841 (unaccepted)
Species Polysiphonia grisea Kützing, 1843 (unaccepted)
Species Polysiphonia gunniana Harvey, 1844 (unaccepted)
Species Polysiphonia haematites Kützing, 1843 (unaccepted, synonym)
Species Polysiphonia hakodatensis Yendo, 1920 (unaccepted)
Species Polysiphonia hancockii E.Y.Dawson, 1944 (unaccepted)
Species Polysiphonia harlandii Harvey, 1860 (unaccepted)
Species Polysiphonia harveyi Bailey, 1848 (unaccepted)
Species Polysiphonia hawaiiensis Hollenberg, 1968 (unaccepted, synonym)
Species Polysiphonia hemispaerica Areschoug, 1875 (unaccepted, misspelling)
Species Polysiphonia hendryi N.L.Gardner, 1927 (unaccepted)
Species Polysiphonia heringii Harvey, 1847 (unaccepted)
Species Polysiphonia heteroclada J.Agardh, 1885 (unaccepted)
Species Polysiphonia hillebrandii Bornet, 1883 (unaccepted)
Species Polysiphonia hookeri Harvey, 1847 (unaccepted)
Species Polysiphonia howei Hollenberg, 1945 (unaccepted)
Species Polysiphonia humilis Kützing, 1849 (unaccepted)
Species Polysiphonia hypnoides Welwitsch ex J.Agardh, 1863 (unaccepted)
Species Polysiphonia hystrix J.D.Hooker & Harvey, 1847 (unaccepted)
Species Polysiphonia impolita Zanardini (unaccepted)
Species Polysiphonia incompta Harvey, 1847 (unaccepted)
Species Polysiphonia inconspicua Reinsch, 1888 (unaccepted)
Species Polysiphonia inconspicua Hollenberg, 1944 (unaccepted)
Species Polysiphonia incurva Zanardini (unaccepted)
Species Polysiphonia inflata G.Martens, 1866 (unaccepted)
Species Polysiphonia insidiosa Greville ex J.Agardh, 1863 (unaccepted)
Species Polysiphonia insidiosa (J.Agardh) P.Crouan & H.Crouan, 1867 (unaccepted, synonym)
Species Polysiphonia intricata (C.Agardh) J.Agardh, 1842 (unaccepted, synonym)
Species Polysiphonia inversa Sonder, 1845 (unaccepted)
Species Polysiphonia japonica Harvey, 1857 (unaccepted)
Species Polysiphonia javanica G.Martens, 1866 (unaccepted)
Species Polysiphonia johnstonii Setchell & Gardner, 1924 (unaccepted)
Species Polysiphonia kellneri Zanardini (unaccepted)
Species Polysiphonia laevigata Kützing, 1843 (unaccepted)
Species Polysiphonia lanosa (Linnaeus) Tandy, 1931 (unaccepted)
Species Polysiphonia latiovalis Noda, 1975 (unaccepted)
Species Polysiphonia lawrenciana Harvey, 1844 (unaccepted)
Species Polysiphonia laxa Kützing, 1843 (unaccepted)
Species Polysiphonia laxa Harvey, 1859 (unaccepted)
Species Polysiphonia laxiuscula Meneghini, 1849 (unaccepted)
Species Polysiphonia lepadicola (Lyngbye) Sprengel, 1827 (unaccepted, synonym)
Species Polysiphonia leptoclonia Zanardini ex A.De Toni, 1907 (unaccepted)
Species Polysiphonia leptura Kützing, 1843 (unaccepted)
Species Polysiphonia lithophila Kützing (unaccepted, synonym)
Species Polysiphonia lobophoralis Mamoozadeh & Freshwater, 2012 (unaccepted)
Species Polysiphonia longiarticulata Zanardini (unaccepted)
Species Polysiphonia longissima J.Agardh, 1896 (unaccepted)
Species Polysiphonia lophoclados (Montagne) Kützing, 1847 (unaccepted)
Species Polysiphonia lutensis Zanardini (unaccepted)
Species Polysiphonia lyallii J.D.Hooker & Harvey, 1845 (unaccepted)
Species Polysiphonia lyngbyei Kützing, 1843 (unaccepted)
Species Polysiphonia macrarthra Zanardini, 1874 (unaccepted)
Species Polysiphonia macrocarpa Harvey, 1836 (unaccepted, synonym)
Species Polysiphonia macrocephala Zanardini, 1864 (unaccepted)
Species Polysiphonia macroclonia Kützing, 1843 (unaccepted)
Species Polysiphonia mallardiae (Harvey) Harvey, 1847 (unaccepted)
Species Polysiphonia martensiana Kützing, 1843 (unaccepted)
Species Polysiphonia masonii Setchell & N.L.Gardner, 1930 (unaccepted)
Species Polysiphonia megarthra Zanardini ex De Toni, 1907 (unaccepted)
Species Polysiphonia melagonium Meneghini, 1844 (unaccepted)
Species Polysiphonia melanochroa Kützing, 1849 (unaccepted)
Species Polysiphonia micracantha Zanardini ex A.De Toni, 1907 (unaccepted)
Species Polysiphonia microcarpa J.D.Hooker & Harvey, 1845 (unaccepted)
Species Polysiphonia microdendron J.Agardh, 1841 (unaccepted, synonym)
Species Polysiphonia miniata (C.Agardh) Kützing, 1849 (unaccepted)
Species Polysiphonia minutissima Hollenberg, 1942 (unaccepted)
Species Polysiphonia moestingi (Lyngbye) Sprengel, 1827 (unaccepted)
Species Polysiphonia moestingii (Lyngbye) Sprengel, 1827 (unaccepted)
Species Polysiphonia monilifera J.D.Hooker & Harvey, 1847 (unaccepted)
Species Polysiphonia monocarpa Montagne, 1842 (unaccepted)
Species Polysiphonia montagnei De Notaris, 1841 (unaccepted)
Species Polysiphonia moritziana Sonder ex Kützing, 1849 (unaccepted)
Species Polysiphonia morroides B.Kim & M.S.Kim, 2014 (unaccepted)
Species Polysiphonia muelleriana J.Agardh, 1870 (unaccepted)
Species Polysiphonia multicapsularis Zanardini (unaccepted)
Species Polysiphonia mutabilis Harvey, 1855 (unaccepted)
Species Polysiphonia myriococca Montagne, 1841 (unaccepted, synonym)
Species Polysiphonia nana Kützing, 1849 (unaccepted)
Species Polysiphonia neglecta Harvey ex J.Agardh, 1863 (unaccepted)
Species Polysiphonia nigra (Hudson) Batters, 1902 (unaccepted, synonym)
Species Polysiphonia nigrescens (Hudson) Greville ex Harvey, 1833 (unaccepted, synonym)
Species Polysiphonia nigrita Sonder, 1845 (unaccepted)
Species Polysiphonia nipponica Segi, 1951 (unaccepted)
Species Polysiphonia notoensis Segi, 1951 (unaccepted)
Species Polysiphonia nova-angliae W.R.Taylor (unaccepted)
Species Polysiphonia novae-angliae W.R.Taylor, 1937 (unaccepted)
Species Polysiphonia nuda Mamoozadeh & Freshwater, 2012 (unaccepted)
Species Polysiphonia nutans Montagne, 1841 (unaccepted, synonym)
Species Polysiphonia obscura (C.Agardh) J.Agardh, 1842 (unaccepted, synonym)
Species Polysiphonia obscura Harvey, 1855 (unaccepted)
Species Polysiphonia obsoleta Segi, 1951 (unaccepted)
Species Polysiphonia ohmaensis Ohta, 1973 (unaccepted)
Species Polysiphonia olneyi Harvey, 1851 (unaccepted, synonym)
Species Polysiphonia ophiocarpa Kützing, 1843 (unaccepted)
Species Polysiphonia paniculata Montagne, 1842 (unaccepted > superseded combination)
Species Polysiphonia parasitica (Hudson) Greville, 1824 (unaccepted)
Species Polysiphonia parvula Zanardini, 1847 (unaccepted)
Species Polysiphonia patens (Dillwyn) Harvey, 1833 (unaccepted)
Species Polysiphonia patersonis Sonder, 1855 (unaccepted)
Species Polysiphonia pauperula Kützing, 1863 (unaccepted)
Species Polysiphonia pecten J.E. Areschoug, 1854 (unaccepted)
Species Polysiphonia pecten-veneris Harvey, 1853 (unaccepted)
Species Polysiphonia pectinata J.D.Hooker & Harvey, 1845 (unaccepted)
Species Polysiphonia pectinata Harvey ex Kützing, 1864 (unaccepted, synonym)
Species Polysiphonia pectinella Harvey, 1855 (unaccepted)
Species Polysiphonia penicillata (C.Agardh) Sprengel, 1827 (unaccepted)
Species Polysiphonia pennata (C.Agardh) J.Agardh, 1842 (unaccepted)
Species Polysiphonia pentamera Hollenberg, 1968 (unaccepted)
Species Polysiphonia perpusilla J.Agardh, 1847 (unaccepted)
Species Polysiphonia perreymondii J.Agardh, 1842 (unaccepted, synonym)
Species Polysiphonia phleborhiza Kützing, 1849 (unaccepted)
Species Polysiphonia physartra Kützing, 1849 (unaccepted)
Species Polysiphonia piligera Zanardini ex De Toni, 1907 (unaccepted)
Species Polysiphonia pinnulata Kützing, 1843 (unaccepted)
Species Polysiphonia platycarpa Børgesen, 1934 (unaccepted)
Species Polysiphonia plumula J.Agardh, 1885 (unaccepted)
Species Polysiphonia polymorpha (Linnaeus) Duby, 1830 (unaccepted, synonym)
Species Polysiphonia polymorpha Montagne, 1843 (unaccepted, synonym)
Species Polysiphonia polyphora Kützing, 1849 (unaccepted)
Species Polysiphonia polyphysa Kützing, 1863 (unaccepted)
Species Polysiphonia porrecta T.Segi, 1951 (unaccepted, synonym)
Species Polysiphonia prorepens Harvey, 1847 (unaccepted)
Species Polysiphonia prostrata Harvey, 1855 (unaccepted)
Species Polysiphonia pseudovillum Hollenberg, 1968 (unaccepted)
Species Polysiphonia pulvinata Liebmann, 1845 (unaccepted)
Species Polysiphonia pungens Hollenberg, 1942 (unaccepted)
Species Polysiphonia punicea Montagne, 1842 (unaccepted)
Species Polysiphonia purpurata Zanardini ex De Toni, 1907 (unaccepted)
Species Polysiphonia purpurea (C.Agardh) J.Agardh, 1842 (unaccepted, synonym)
Species Polysiphonia purpurea Postels & Ruprecht, 1840 (unaccepted, synonym)
Species Polysiphonia pycnocoma Kützing, 1849 (unaccepted)
Species Polysiphonia pycnophloea Kützing, 1849 (unaccepted)
Species Polysiphonia ramellosa Kützing, 1843 (unaccepted)
Species Polysiphonia ramulosa (C.Agardh) Sprengel, 1827 (unaccepted)
Species Polysiphonia repens Kützing, 1843 (unaccepted)
Species Polysiphonia reptabunda (Suhr) Kützing, 1843 (unaccepted)
Species Polysiphonia rhizoidea Meñez, 1964 (unaccepted, synonym)
Species Polysiphonia rhododactyla Harvey, 1855 (unaccepted)
Species Polysiphonia rhodomeloides Kützing, 1847 (unaccepted)
Species Polysiphonia richardsonii W.J.Hooker ex Harvey, 1833 (unaccepted, synonym)
Species Polysiphonia robusta Kützing, 1843 (unaccepted)
Species Polysiphonia robusta N.L.Gardner, 1927 (unaccepted)
Species Polysiphonia roeana Harvey, 1855 (unaccepted)
Species Polysiphonia rosea Greville, 1824 (unaccepted)
Species Polysiphonia roseola (C.Agardh) Fries, 1835 (unaccepted)
Species Polysiphonia rostrata Sonder, 1845 (unaccepted)
Species Polysiphonia ruchingeri (C.Agardh) Zanardini, 1841 (unaccepted, synonym)
Species Polysiphonia rufolanosa Harvey, 1855 (unaccepted, synonym)
Species Polysiphonia rytiphlaeoides J.D.Hooker & Harvey, 1845 (unaccepted)
Species Polysiphonia sabulosa B.Kim & M.S.Kim, 2014 (unaccepted)
Species Polysiphonia sanguinea (C.Agardh) J.Agardh, 1842 (unaccepted)
Species Polysiphonia savatieri Hariot, 1891 (unaccepted, synonym)
Species Polysiphonia schneideri B.Stuercke & D.W.Freshwater, 2010 (unaccepted)
Species Polysiphonia schousboei Thuret, 1876 (unaccepted)
Species Polysiphonia schuebeleri Foslie, 1881 (unaccepted)
Species Polysiphonia scoparia Kützing, 1843 (unaccepted)
Species Polysiphonia secunda (C.Agardh) Zanardini, 1840 (unaccepted)
Species Polysiphonia senticosa Suhr ex Kützing, 1849 (unaccepted)
Species Polysiphonia sericea Hauck, 1877 (unaccepted)
Species Polysiphonia setacea Hollenberg, 1968 (unaccepted, synonym)
Species Polysiphonia simplex Hollenberg, 1942 (unaccepted, synonym)
Species Polysiphonia simpliciuscula P.Crouan & H.Crouan, 1852 (unaccepted, synonym)
Species Polysiphonia simulans Harvey, 1849 (unaccepted, synonym)
Species Polysiphonia siretokensis Yamada & Tanaka, 1944 (unaccepted)
Species Polysiphonia snyderae Kylin, 1941 (unaccepted)
Species Polysiphonia solierii J.Agardh, 1842 (unaccepted)
Species Polysiphonia sparsa (Setchell) Hollenberg, 1968 (unaccepted)
Species Polysiphonia sphaerocarpa Børgesen, 1918 (unaccepted, synonym)
Species Polysiphonia spiculifera Zanardini ex Kützing, 1864 (unaccepted)
Species Polysiphonia spinifera Kützing, 1843 (unaccepted)
Species Polysiphonia spinosissima Harvey, 1859 (unaccepted)
Species Polysiphonia spinuligera Zanardini, 1874 (unaccepted)
Species Polysiphonia spinulosa Greville, 1823 (unaccepted, synonym)
Species Polysiphonia spiralis L.Batten, 1923 (unaccepted, synonym)
Species Polysiphonia squarrosa Kützing, 1849 (unaccepted)
Species Polysiphonia stangeri J.Agardh, 1863 (unaccepted)
Species Polysiphonia stenocarpa Kützing, 1849 (unaccepted)
Species Polysiphonia stichidiosa Funk, 1955 (unaccepted)
Species Polysiphonia stimpsonii Harvey, 1859 (unaccepted)
Species Polysiphonia strictissima J.D.Hooker & Harvey, 1845 (unaccepted)
Species Polysiphonia strictoides (Lyngbye) Kützing (unaccepted)
Species Polysiphonia subadunca Kützing, 1843 (unaccepted)
Species Polysiphonia subcontinua (C.Agardh) J.Agardh, 1842 (unaccepted, synonym)
Species Polysiphonia subtilis Kützing, 1843 (unaccepted, synonym)
Species Polysiphonia subulifera (C.Agardh) Harvey, 1834 (unaccepted)
Species Polysiphonia sulivanae J.D.Hooker & Harvey, 1847 (unaccepted)
Species Polysiphonia tasmanica (Sonder) J.Agardh, 1863 (unaccepted)
Species Polysiphonia taylorii Hollenberg ex Williams, 1949 (unaccepted, synonym)
Species Polysiphonia teges Womersley, 1979 (unaccepted)
Species Polysiphonia tenebrosa Harvey, 1847 (unaccepted)
Species Polysiphonia tenella (C.Agardh) Moris & De Notaris, 1839 (unaccepted, synonym)
Species Polysiphonia tenuis Hollenberg, 1968 (unaccepted)
Species Polysiphonia tenuis (C.Agardh) E.M.Fries, 1836 (unaccepted, synonym)
Species Polysiphonia tepida Hollenberg, 1958 (unaccepted, synonym)
Species Polysiphonia teradomariensis M.Noda, 1971 (unaccepted)
Species Polysiphonia thuyoides Harvey, 1836 (unaccepted)
Species Polysiphonia thwaitesii Harvey ex J.Agardh, 1863 (unaccepted)
Species Polysiphonia thyrsigera J.Agardh, 1847 (unaccepted)
Species Polysiphonia tongatensis Harvey ex Kützing, 1864 (unaccepted)
Species Polysiphonia trichodes Kützing, 1843 (unaccepted, synonym)
Species Polysiphonia tripinnata J.Agardh, 1842 (unaccepted)
Species Polysiphonia umbellifera Kützing, 1843 (unaccepted)
Species Polysiphonia upolensis Grunow, 1874 (unaccepted, synonym)
Species Polysiphonia urbana Harvey, 1847 (unaccepted)
Species Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville, 1824 (unaccepted, synonym)
Species Polysiphonia vagabunda Harvey, 1859 (unaccepted, synonym)
Species Polysiphonia valida J.Agardh, 1896 (unaccepted)
Species Polysiphonia variegata (C.Agardh) J.Agardh, 1842 (unaccepted)
Species Polysiphonia versicolor J.D.Hooker & Harvey, 1847 (unaccepted)
Species Polysiphonia verticillata Harvey, 1833 (unaccepted)
Species Polysiphonia vestita J.Agardh, 1842 (unaccepted, synonym)
Species Polysiphonia victoriae (Harvey) Kützing, 1864 (unaccepted)
Species Polysiphonia vidovichii Meneghini ex Kützing, 1845 (unaccepted, synonym)
Species Polysiphonia violacea (Roth) Sprengel, 1827 (unaccepted, synonym)
Species Polysiphonia virgata (C.Agardh) Sprengel, 1827 (unaccepted)
Species Polysiphonia woodii Harvey, 1853 (unaccepted)
Species Polysiphonia wulfenii (Roth) J.Agardh, 1842 (unaccepted)
Species Polysiphonia yendoi T.Segi, 1951 (unaccepted)
Species Polysiphonia yonakuniensis Segi, 1951 (unaccepted, synonym)
Species Polysiphonia zostericola Lucas, 1919 (unaccepted)

Species Polysiphonia adriatica Schiffner, 1931 (uncertain)
Species Polysiphonia adscendens Meneghini, 1844 (uncertain)
Species Polysiphonia adscendens (Bonnemaison) P.Crouan & H.Crouan (uncertain)
Species Polysiphonia americana Reinsch (uncertain)
Species Polysiphonia amethystea Kützing (uncertain)
Species Polysiphonia arenaria Postels & Ruprecht (uncertain)
Species Polysiphonia aspera Zanardini ex A.De Toni, 1907 (uncertain)
Species Polysiphonia attenuata Zanardini ex A.De Toni, 1907 (uncertain)
Species Polysiphonia bellula De Notaris (uncertain)
Species Polysiphonia bicornis Sonder, 1880 (uncertain)
Species Polysiphonia brachygona Harvey, 1855 (uncertain)
Species Polysiphonia calliptera Kützing (uncertain)
Species Polysiphonia callitricha Kützing (uncertain)
Species Polysiphonia capillata De Notaris (uncertain)
Species Polysiphonia caulescens J.Agardh (uncertain)
Species Polysiphonia chlamydopteris Zanardini (uncertain)
Species Polysiphonia chlamydopteris Meneghini ex A.De Toni, 1907 (uncertain)
Species Polysiphonia codiicola Zanardini (uncertain)
Species Polysiphonia dasiiformis Zanardini, 1843 (uncertain)
Species Polysiphonia davisii J.D.Hooker & Harvey (uncertain)
Species Polysiphonia dichocephala Kützing (uncertain)
Species Polysiphonia dichotoma Zanardini ex A.De Toni, 1907 (uncertain, uncertain taxonomic status subjected to verification)
Species Polysiphonia diffusa (Hudson) Jones & Kingston (uncertain)
Species Polysiphonia discolor (Agardh) Sprengel (uncertain)
Species Polysiphonia episcopalis Zanardini ex A.De Toni, 1907 (uncertain)
Species Polysiphonia expansa Zanardini, 1864 (uncertain, uncertain taxonomic status subjected to verification)
Species Polysiphonia floccosa Zanardini, 1843 (uncertain)
Species Polysiphonia furcata Meneghini ex A.De Toni, 1907 (uncertain)
Species Polysiphonia gibbesii Harvey (uncertain)
Species Polysiphonia guadalupens Setchell & Gardner (uncertain)
Species Polysiphonia guernisaci (P.L.Crouan & H.M.Crouan) J.Agardh (uncertain)
Species Polysiphonia hamulifera Kützing (uncertain)
Species Polysiphonia hispida Zanardini, 1864 (uncertain)
Species Polysiphonia incompta De Notaris, 1846 (uncertain)
Species Polysiphonia insignis P.L.Crouan & H.M.Crouan (uncertain)
Species Polysiphonia juncea Kützing (uncertain)
Species Polysiphonia lasiorhiza Kützing (uncertain)
Species Polysiphonia lasiotricha Kützing (uncertain)
Species Polysiphonia leptoclada (Montagne) Kützing, 1864 (uncertain)
Species Polysiphonia mucosa P.L.Crouan & H.M.Crouan (uncertain)
Species Polysiphonia multifida Duby (uncertain)
Species Polysiphonia multifida Kützing (uncertain)
Species Polysiphonia nemalii Zanardini, 1843 (uncertain)
Species Polysiphonia pappeana Kützing (uncertain)
Species Polysiphonia patula Kützing (uncertain)
Species Polysiphonia physarthra (Kützing) Kützing (uncertain)
Species Polysiphonia polycephala Zanardini ex De Toni, 1907 (uncertain)
Species Polysiphonia pulchella De Notaris (uncertain)
Species Polysiphonia radicans (Meneghini) J.Agardh (uncertain)
Species Polysiphonia regularis Kützing (uncertain)
Species Polysiphonia rytiphloeoides J.D.Hooker & Harvey (uncertain)
Species Polysiphonia sanctipetri Collins (uncertain)
Species Polysiphonia secundata (Suhr) Kützing (uncertain)
Species Polysiphonia sentosa Kützing (uncertain)
Species Polysiphonia tenera Harvey (uncertain)
Species Polysiphonia tenuissima De Notaris (uncertain)
Species Polysiphonia tommasiniana Bertoloni, 1867 (uncertain, uncertain taxonomic status subjected to verification)
Species Polysiphonia trichoclada Kützing (uncertain)
Species Polysiphonia variegata (Sperk) Voronikhj, 1909 (uncertain, synonym)
Species Polysiphonia veneta Zanardini, 1847 (uncertain)
Species Polysiphonia violascens Kützing (uncertain)
Species Polysiphonia virens Kützing (uncertain)
Species Polysiphonia vulpina De Notaris (uncertain)
Species Polysiphonia yokoskensis Hariot (uncertain)

marine, brackish, fresh

Hertwig, R. (1882). Die Actinien der Challenger Expedition. Gustav Fischer. Jena., pp. 119.
page(s): 55-56 [details]   

LSID urn:lsid:algaebase.org:taxname:8028  

Guiry, M.D. & Guiry, G.M. (2023). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Polysiphonia Greville, 1823. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=143853 on 2023-06-03

 The webpage text is licensed under a Creative Commons Attribution 4.0 License

[taxonomic tree]