• Acrodiscus vidovichii (Meneghini) Zanardini, 1868: one motile gamete
• Acrosorium acrospermum (J.Agardh) Kylin, 1938: one motile gamete
• Acrosorium amphiroae Jaasund, 1976: one motile gamete
• Acrosorium ciliolatum (Harvey) Kylin, 1924: one motile gamete
• Acrosorium cincinnatum M.J.Wynne, 1986: one motile gamete
• Acrosorium decumbens (J.Agardh) Kylin, 1929: one motile gamete
• Acrosorium deformatum (Suhr) Papenfuss, 1943: one motile gamete
• Acrosorium flabellatum Yamada, 1930: one motile gamete
• Acrosorium fragile W.R.Taylor, 1945: one motile gamete
• Acrosorium krishnamurthyi M.Umamaheswara Rao, 2002: one motile gamete
• Acrosorium maculatum (Sonder ex Kützing) Papenfuss, 1940: one motile gamete
• Acrosorium minus (Sonder) Kylin, 1924: one motile gamete
• Acrosorium odontophorum M.A.Howe & W.R.Taylor, 1931: one motile gamete
• Acrosorium papenfussii W.R.Taylor, 1945: one motile gamete
• Acrosorium polyneurum Okamura, 1936: one motile gamete
• Acrosorium procumbens E.Y.Dawson, 1961: one motile gamete
• Acrosorium venulosum (Zanardini) Kylin, 1924: one motile gamete
• Acrosorium yendoi Yamada, 1930: one motile gamete
• Acrosymphyton brainardii Vroom & I.A.Abbott, 2004: one motile gamete
• Acrosymphyton caribaeum (J.Agardh) Sjöstedt, 1926: one motile gamete
• Acrosymphyton firmum M.W.Hawkes, 1982: one motile gamete
• Acrosymphyton purpuriferum (J.Agardh) G.Sjöstedt, 1926: one motile gamete
• Acrosymphyton taylorii I.A.Abbott, 1962: one motile gamete
• Acrosymphyton tenax A.J.K.Millar & Kraft, 1984: one motile gamete
• Ahnfeltia borealis D.Milstein & G.W.Saunders, 2012: one motile gamete
• Ahnfeltia dura (C.Agardh) Fries: one motile gamete
• Ahnfeltia elongata Montagne, 1854: one motile gamete
• Ahnfeltia fastigiata (Endlicher) Makienko, 1970: one motile gamete
• Ahnfeltia pinnulata Harvey, 1853: one motile gamete
• Ahnfeltia plicata (Hudson) E.M.Fries, 1836: one motile gamete
• Ahnfeltia polyides J.E. Areschoug: one motile gamete
• Ahnfeltia setacea (Kützing) F.Schmitz, 1893: one motile gamete
• Ahnfeltia svensonii W.R.Taylor, 1945: one motile gamete
• Ahnfeltia torulosa (Hooker f. & Harvey) J.Agardh, 1876: one motile gamete
• Ahnfeltia yinggehaiensis B.-M.Xia & Y.-Q.Zhang, 2000: one motile gamete
• Ahnfeltiopsis chnoosporoides (T.Tanaka & P.H.Hô) Masuda, 1993: one motile gamete
• Ahnfeltiopsis complicata (Kützing) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis densa (J.Agardh) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis devoniensis (Greville) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis fastigiata J.A.Lewis & Womersley, 1994: one motile gamete
• Ahnfeltiopsis flabelliformis (Harvey) Masuda, 1993: one motile gamete
• Ahnfeltiopsis gigartinoides (J.Agardh) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis glomerata (J.Agardh) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis gracilis (Yamada) Masuda, 1993: one motile gamete
• Ahnfeltiopsis guangdongensis B.-M.Xia & Y.-Q.Zhang, 2000: one motile gamete
• Ahnfeltiopsis hainanensis B.-M.Xia & Y.-Q.Zhang, 2000: one motile gamete
• Ahnfeltiopsis hancockii (E.Y.Dawson) J.N.Norris & Fredericq, 2014: one motile gamete
• Ahnfeltiopsis humilis (Lindauer) J.A.Lewis & Womersley, 1994: one motile gamete
• Ahnfeltiopsis intermedia (Kylin) Stegenga, Bolton & R.J.Anderson, 1997: one motile gamete
• Ahnfeltiopsis linearis (C.Agardh) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis masudae B.-M.Xia & Y.-Q.Zhang, 2000: one motile gamete
• Ahnfeltiopsis okamurae P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis polyclada (Kützing) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis pusilla (Montagne) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis pygmaea (J.Agardh) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis quinhonensis (P.H.Hô) Masuda, 1993: one motile gamete
• Ahnfeltiopsis serenei (E.Y.Dawson) Masuda, 1993: one motile gamete
• Ahnfeltiopsis smithii (W.R.Taylor) K.M.Dreckmann & I.Stout, 1993: one motile gamete
• Ahnfeltiopsis triquetrifolia Masuda & Kogame, 1998: one motile gamete
• Ahnfeltiopsis vermicularis (C.Agardh) P.C.Silva & DeCew, 1992: one motile gamete
• Ahnfeltiopsis yamadae (Segawa) Masuda, 1993: one motile gamete
• Alsidium corallinum C.Agardh, 1827: one motile gamete
• Alsidium distichum (Lindenb.) Trevisan: one motile gamete
• Alsidium helminthochorton (Schwendimann) Kützing, 1843: one motile gamete
• Alsidium oliveiranum S.M.Guimarães & M.T.Fujii, 2019: one motile gamete
• Alsidium pacificum E.Y.Dawson, 1959: one motile gamete
• Alsidium pusillum E.Y.Dawson, 1963: one motile gamete
• Alsidium seaforthii (Turner) J.Agardh, 1841: one motile gamete
• Alsidium triquetrum (S.G.Gmelin) Trevisan, 1845: one motile gamete
• Alsidium vagum (Zanardini) Zanardini, 1858: one motile gamete
• Amphiroa abbreviata Duchassaing, 1850: one motile gamete
• Amphiroa americana Johnson & Ferris: one motile gamete
• Amphiroa anastomosans Weber-van Bosse, 1904: one motile gamete
• Amphiroa anceps (Lamarck) Decaisne, 1842: one motile gamete
• Amphiroa anchiverricosa Johnson & Ferris: one motile gamete
• Amphiroa angustata: one motile gamete
• Amphiroa angustivirgata J.P.Beckmann & R.Beckmann: one motile gamete
• Amphiroa annobonensis Pilger, 1919: one motile gamete
• Amphiroa annulata Me.Lemoine, 1929: one motile gamete
• Amphiroa aspergillum: one motile gamete
• Amphiroa beauvoisii J.V.Lamouroux, 1816: one motile gamete
• Amphiroa boviesii Kützing: one motile gamete
• Amphiroa bowerbankii Harvey, 1849: one motile gamete
• Amphiroa brasiliana Decaisne, 1842: one motile gamete
• Amphiroa breviarticulata Areschoug, 1852: one motile gamete
• Amphiroa canaliculata G.Martens, 1866: one motile gamete
• Amphiroa capensis Areschoug, 1852: one motile gamete
• Amphiroa carpiana (Dragastan) Dragastan: one motile gamete
• Amphiroa cladoniiformis Meneghini ex Kützing: one motile gamete
• Amphiroa compressa M.Lemoine, 1929: one motile gamete
• Amphiroa comprexa Ishijima, 1944 †: one motile gamete
• Amphiroa crassa J.V.Lamouroux, 1824: one motile gamete
• Amphiroa crosslandii Me.Lemoine, 1929: one motile gamete
• Amphiroa crustiformis E.Y.Dawson, 1963: one motile gamete
• Amphiroa cryptarthrodia Zanardini, 1843: one motile gamete
• Amphiroa cumingii Montagne, 1844: one motile gamete
• Amphiroa currae Ganesan, 1971: one motile gamete
• Amphiroa cylindrica Ishijima, 1944 †: one motile gamete
• Amphiroa delicatula Lemoine: one motile gamete
• Amphiroa desmoulinii Duchassaing, 1850: one motile gamete