1. Genus Abbottella Hollenberg, 1967
2. Genus Acrocystis Zanardini, 1872
3. Tribe Alsidieae Ardissone, 1883
   1. Genus Alsidium C.Agardh, 1827
   2. Genus Bryothamnion Kützing, 1843
   3. Genus Digenea C.Agardh, 1822
   4. Genus Helminthochorton Zanardini accepted as Alsidium C.Agardh, 1827
4. Tribe Amansieae Schmitz & Hauptfleisch, 1889
   1. Genus Adamsiella L.E.Phillips & W.A.Nelson, 2002
   2. Genus Amansia J.V.Lamouroux, 1809
   3. Genus Aneurianna L.E.Phillips, 2006
   4. Genus Enantiocladia Falkenberg, 1897
   5. Genus Epiglossum Kützing, 1849
   6. Genus Halopithys Kützing, 1843
   7. Genus Kentrophora S.M.Wilson & Kraft, 2001
   8. Genus Kuetzingia Sonder, 1845
   9. Genus Lenormandia Sonder, 1845
   10. Genus Melanamansia R.E.Norris, 1988
   11. Genus Nanopera S.M.Wilson & G.T.Kraft, 2000
   12. Genus Neurymenia J.Agardh, 1863
   13. Genus Osmundaria J.V.Lamouroux, 1813
   14. Genus Protokuetzingia Falkenberg, 1897
   15. Genus Rytiphlaea C.Agardh, 1817
   16. Genus Vidalia J.V.Lamouroux ex J.Agardh, 1863
   17. Genus Aneuria (J.Agardh) Weber-van Bosse, 1911 accepted as Lenormandiopsis Papenfuss, 1967 accepted as Lenormandia Sonder, 1845 (synonym)
   18. Genus Spirhymenia Decaisne, 1841 accepted as Osmundaria J.V.Lamouroux, 1813
   19. Genus Volubilaria J.V.Lamououx, 1830 accepted as Osmundaria J.V.Lamouroux, 1813 (synonym)
5. Genus Amplisiphonia Hollenberg, 1939
6. Genus Antarctocolax Skottsberg, 1953
7. Genus Ardissonula J.De Toni, 1936
8. Genus Beringiella M.J.Wynne, 1980
9. Tribe Bostrychieae Falkenberg, 1901
   1. Genus Bostrychia Montagne, 1842
   2. Genus Helicothamnion Kützing, 1843 accepted as Bostrychia Montagne, 1842
   3. Genus Scorpiura Stackhouse, 1816 accepted as Bostrychia Montagne, 1842
10. Genus Bostrychiocolax Zuccarello & J.A.West, 1994
11. Tribe Brongniartelleae
12. Genus Chamaethamnion Falkenberg, 1897
13. Tribe Chondrieae F.Schmitz & Falkenberg, 1897
    1. Genus Acanthophora J.V.Lamouroux, 1813
    2. Genus Benzaitenia Yendo, 1913
    3. Genus Chondria C.Agardh, 1817
    4. Genus Coeloclonium J.Agardh, 1876
    5. Genus Husseya J.Agardh, 1901
    6. Genus Neochondria S.Sutti, M.Tani, Y.Yamagishi, T.Abe & K.Kogame, 2018
    7. Genus Ululania K.E.Apt & K.E.Schlech, 1998
    8. Genus Chondriopsis J.Agardh, 1863 accepted as Chondria C.Agardh, 1817 (synonym)
    9. Genus Dasyphylla Stackhouse, 1816 accepted as Chondria C.Agardh, 1817
    10. Genus Husseyella Papenfuss, 1958 accepted as Husseya J.Agardh, 1901 (synonym)
    11. Genus Rhododactylis J.Agardh, 1876 accepted as Husseya J.Agardh, 1901 (synonym)
    12. Genus Halitaenia J.Agardh (uncertain > nomen dubium)
14. Genus Cladhymenia Harvey, 1845
15. Tribe Cladureae Díaz-Tapia & Maggs, 2017
    1. Genus Cladurus Falkenberg, 1897
16. Genus Colacopsis De Toni, 1903
17. Genus Dawsoniella Hollenberg, 1967
18. Genus Dawsoniocolax A.B.Joly & Yamaguishi-Tomita, 1970
19. Genus Deltalsia Díaz-Tapia & Rodríguez-Buján, 2022
20. Genus Digeneopsis Simons, 1970
21. Genus Dipterocolax J.Morrill, 1977
22. Tribe Dipterosiphonieae Díaz-Tapia & Maggs, 2017
    1. Genus Dipterosiphonia F.Schmitz & Falkenberg, 1897
23. Genus Dolichoscelis J.Agardh, 1897
24. Genus Doxodasya (F.Schmitz) Falkenberg, 1901
25. Genus Echinophycus Huisman, 2001
26. Genus Erythrostachys J.Agardh ex Jean White, 1912
27. Genus Exophyllum Weber-van Bosse, 1911
28. Genus Fernandosiphonia Levring, 1941
29. Genus Gonatogenia J.Agardh, 1896
30. Genus Hawaiia Hollenberg, 1967
31. Tribe Herposiphonieae Schmitz & Falkenberg, 1897
    1. Genus Ditria Hollenberg, 1967
    2. Genus Gredgaria Womersley, 2003
    3. Genus Herpopteros Falkenberg, 1897
    4. Genus Herposiphonia Nägeli, 1846
    5. Genus Herposiphoniella Womersley, 2003
    6. Genus Stichothamnion Børgesen, 1930
    7. Genus Tiparraria Womersley, 2003
    8. Genus Wilsonosiphonia D.Bustamante, Won & T.O.Cho, 2017
32. Tribe Heterocladieae Falkenberg, 1901
    1. Genus Heterocladia Decaisne, 1841
33. Genus Heterodasya Joly & Oliveira, 1966
34. Genus Holotrichia F.Schmitz, 1897
35. Genus Jantinella Kylin, 1941
36. Genus Kintarosiphonia S.Uwai & M.Masuda, 1999
37. Tribe Laurencieae F.Schmitz, 1889
    1. Genus Chondrophycus (J.Tokida & Y.Saito) Garbary & J.T.Harper, 1998
    2. Genus Corynecladia J.Agardh, 1876
    3. Genus Janczewskia Solms-Laubach, 1877
    4. Genus Laurencia J.V.Lamouroux, 1813
    5. Genus Laurenciella V.Cassano, Gil-Rodrüguez, Sentües, Düaz-Larrea, M.C.Oliveira & M.T.Fujii, 2012
    6. Genus Ohelopapa F.Rousseau, Martin-Lescanne, Payri & L.Le Gall, 2017
    7. Genus Osmundea Stackhouse, 1809
    8. Genus Palisada K.W.Nam, 2007
    9. Genus Rodriguezella F.Schmitz, 1895
    10. Genus Yuzurua (Nam) Martin-Lescanne, 2010
    11. Genus Coronaphycus Y.Metti, 2015 accepted as Corynecladia J.Agardh, 1876
    12. Genus Pinnatifida Stackhouse, 1816 (uncertain)
38. Genus Laurenciocolax A.D.Zinova & L.P.Perestenko, 1964
39. Genus Leachiella Kugrens, 1982
40. Genus Leveillea Decaisne, 1839
41. Genus Levringiella Kylin, 1956
42. Tribe Lophosiphonieae Fritsch, 1945
    1. Genus Lophosiphonia Falkenberg, 1897
43. Tribe Lophothalieae Schmitz & Falkenberg, 1897
    1. Genus Brongniartella Bory de Saint-Vincent, 1822
    2. Genus Haplodasya Falkenberg, 1897
    3. Genus Lophocladia (J.Agardh) F.Schmitz, 1893
    4. Genus Lophothalia Kützing, 1849
    5. Genus Spirophycus A.J.K.Millar, 2000
    6. Genus Veleroa E.Y.Dawson, 1944
    7. Genus Lynkiella R.P.Varma, 1960 accepted as Veleroa E.Y.Dawson, 1944 (synonym)
44. Genus Meridiocolax J.Morrill, 1976
45. Genus Metamorphe Falkenberg, 1897
46. Genus Microcolax F.Schmitz, 1897
47. Genus Micropeuce J.Agardh, 1899
48. Genus Murrayella F.Schmitz, 1893
49. Tribe Neotenophyceae Kraft & I.A.Abbott, 2002
    1. Genus Neotenophycus Kraft & I.A.Abbott, 2002
50. Genus Oligocladella P.C.Silva, 1996
51. Genus Onychocolax M.A.Pocock, 1956
52. Tribe Ophidocladeae Díaz-Tapia & Maggs, 2017
    1. Genus Ophidocladus Falkenberg, 1897
53. Genus Pachychaeta Kützing, 1862
54. Genus Phaeocolax Hollenberg, 1967
55. Genus Picconiella De Toni fil., 1936
56. Genus Placophora J.Agardh, 1863
57. Tribe Pleurostichidieae Hommersand, 1963
    1. Genus Pleurostichidium Heydrich, 1893
58. Tribe Polysiphonieae Schmitz, 1889
    1. Genus Alleynea Womersley, 2003
    2. Genus Boergeseniella Kylin, 1956
    3. Genus Bryocladia F.Schmitz, 1897
    4. Genus Carradoriella P.C.Silva, 1996
    5. Genus Chiracanthia Falkenberg, 1897
    6. Genus Ctenosiphonia Falkenberg, 1897
    7. Genus Echinothamnion Kylin, 1956
    8. Genus Enelittosiphonia Segi, 1949
    9. Genus Epizonaria Díaz-Tapia & Maggs, 2017
    10. Genus Eutrichosiphonia A.M.Savoie & G.W.Saunders, 2018
    11. Genus Kapraunia A.M.Savoie & G.W.Saunders, 2018
    12. Genus Neosiphonia M.-S.Kim & I.K.Lee, 1999
    13. Genus Perrinia Womersley, 2003
    14. Genus Pityophykos Papenfuss, 1958
    15. Genus Polysiphonia Greville, 1823
    16. Genus Symphyocolax M.S.Kim, 2010
    17. Genus Carradoria Martius, 1833 accepted as Polysiphonia Greville, 1823 (synonym)
    18. Genus Dawsoniella A.B.Joly & Yamaguishi-Tomita, 1967 accepted as Dawsoniocolax A.B.Joly & Yamaguishi-Tomita, 1970 (synonym)
    19. Genus Falkenbergiella Kylin, 1938 accepted as Lophosiphonia Falkenberg, 1897 (synonym)
    20. Genus Oligosiphonia J.Agardh accepted as Polysiphonia Greville, 1823
    21. Genus Orcasia Kylin, 1941 accepted as Polysiphonia Greville, 1823
    22. Genus Polyochetum Chevallier, 1836 accepted as Polysiphonia Greville, 1823
    23. Genus Roschera Sonder, 1879 accepted as Tolypiocladia F.Schmitz, 1897 (synonym)
59. Tribe Polyzonieae F.Schmitz & Falkenberg, 1897
    1. Genus Cliftonaea (Harvey) Harvey, 1863
    2. Genus Dasyclonium J.Agardh, 1894
    3. Genus Echinosporangium Kylin, 1956
    4. Genus Polyzonia Suhr, 1834
    5. Genus Cliftonia Harvey, 1859 accepted as Cliftonaea (Harvey) Harvey, 1863 (synonym)
    6. Genus Euzoniella Falkenberg, 1901 accepted as Dasyclonium J.Agardh, 1894 (synonym)
60. Tribe Pterosiphonieae Falkenberg, 1901
    1. Genus Aphanocladia Falkenberg, 1897
    2. Genus Dictyomenia Greville, 1830
    3. Genus Heterostroma Kraft & M.J.Wynne, 1992
    4. Genus Lophurella F.Schmitz, 1897
    5. Genus Pentocladia Huisman, 2018
    6. Genus Periphykon Weber-van Bosse, 1929
    7. Genus Pollexfenia Harvey, 1844
    8. Genus Pterosiphonia Falkenberg, 1897
    9. Genus Pterosiphoniella E.Y.Dawson, 1963
    10. Genus Savoiea M.J.Wynne, 2018
    11. Genus Symphyocladia Falkenberg, 1897
    12. Genus Symphyocladiella D.E.Bustamante, B.Y.Won & T.O.Cho, 2019
    13. Genus Womersleyella Hollenberg, 1967
    14. Genus Xiphosiphonia Savoie & G.W.Saunders, 2016
    15. Genus Jeannerettia J.D.Hooker & Harvey, 1847 accepted as Pollexfenia Harvey, 1844 (synonym)
61. Genus Pycnothamnion P.J.L.Dangeard, 1953
62. Genus Rhodolachne M.J.Wynne, 1970
63. Tribe Rhodomeleae
    1. Genus Choreocolax Reinsch, 1875
    2. Genus Harveyella F.Schmitz & Reinke, 1889
    3. Genus Neorhodomela Masuda, 1982
    4. Genus Odonthalia Lyngbye, 1819
    5. Genus Rhodomela C.Agardh, 1822
    6. Genus Lophura Kützing, 1843 (uncertain > nomen dubium)
64. Genus Rhodomelopsis Pocock, 1953
65. Genus Schizochlaenion M.J.Wynne & R.E.Norris, 1982
66. Tribe Sonderelleae L.E.Phillips, 2001
    1. Genus Lembergia Saenger, 1971
    2. Genus Sonderella F.Schmitz, 1897
67. Genus Spirocladia Børgesen, 1933
68. Genus Sporoglossum Kylin, 1919
69. Tribe Streblocladieae Díaz-Tapia & Maggs, 2017
    1. Genus Acanthosiphonia A.M.Savoie & G.W.Saunders, 2019
    2. Genus Aiolocolax M.A.Pocock, 1956
    3. Genus Diplocladia Kylin, 1956
    4. Genus Erythrocystis J.Agardh, 1876
    5. Genus Lampisiphonia H.-G.Choi, Diaz Tapia & Bárbara, 2013
    6. Genus Leptosiphonia Kylin, 1956
    7. Genus Melanothamnus Bornet & Falkenberg, 1901
    8. Genus Polyostea Ruprecht, 1850
    9. Genus Pterochondria Hollenberg, 1942
    10. Genus Streblocladia F.Schmitz, 1897
    11. Genus Tolypiocladia F.Schmitz, 1897
    12. Genus Vertebrata S.F.Gray, 1821
70. Genus Stromatocarpus Falkenberg, 1897
71. Genus Tayloriella Kylin, 1938
72. Tribe Thaumatelleae Díaz-Tapia & Maggs, 2017
    1. Genus Thaumatella (Falkenberg) Kylin, 1956
73. Genus Trichidium J.M.Noble & Kraft, 1984
74. Genus Trigenea Sonder, 1845
75. Genus Tylocolax F.Schmitz, 1897
76. Genus Waldoia W.R.Taylor, 1962
77. Genus Wilsonaea F.Schmitz, 1893
78. Genus Wrightiella F.Schmitz, 1893
79. Genus Amphibia Stackhouse, 1809 accepted as Bostrychia Montagne, 1842 (synonym)
80. Genus Aphanarthron J.Agardh, 1868 accepted as Rhodomela C.Agardh, 1822 (synonym)
81. Genus Atomaria Stackhouse, 1816 accepted as Odonthalia Lyngbye, 1819 (synonym)
82. Genus Bolboclinium J.Agardh, 1894 accepted as Chondria C.Agardh, 1817 (synonym)
83. Genus Epineuron Harvey, 1845 accepted as Osmundaria J.V.Lamouroux, 1813 (synonym)
84. Genus Euzonia Kylin, 1956 accepted as Dasyclonium J.Agardh, 1894 (synonym)
85. Genus Fuscaria Stackhouse, 1809 accepted as Rhodomela C.Agardh, 1822 (synonym)
86. Genus Grammitella P.Crouan & H.Crouan, 1848 accepted as Polysiphonia Greville, 1823
87. Genus Hutchinsia C.Agardh, 1817 (Illegitimate: later homonym of Hutchinsia W.T. Aiton, 1812 (Brassicaceae))
88. Genus Isoptera Okamura, 1901 accepted as Ardissonula J.De Toni, 1936
89. Genus Lenormandiopsis Papenfuss, 1967 accepted as Lenormandia Sonder, 1845 (synonym)
90. Genus Maschalostroma F.Schmitz, 1897 accepted as Gonatogenia J.Agardh, 1896 (synonym)
91. Genus Melanocolax M.T.Martin & Pockock, 1953 accepted as Colacopsis De Toni, 1903 (synonym)
92. Genus Melanoseris Zanardini, 1874 accepted as Pollexfenia Harvey, 1844 (synonym)
93. Genus Micramansia Kützing, 1865 accepted as Placophora J.Agardh, 1863
94. Genus Murrayellopsis E.Post, 1963 accepted as Veleroa E.Y.Dawson, 1944 (synonym)
95. Genus Oligocladus Weber-van Bosse, 1911 accepted as Oligocladella P.C.Silva, 1996 (synonym)
96. Genus Physcophora Kützing, 1843 accepted as Bryothamnion Kützing, 1843
97. Genus Piconiella accepted as Picconiella De Toni fil., 1936 (misspelling)
98. Genus Pithyopsis Falkenberg, 1897 accepted as Pityophykos Papenfuss, 1958
99. Genus Polyphacum C.Agardh, 1820 accepted as Osmundaria J.V.Lamouroux, 1813 (synonym)
100. Genus Pteronia F.Schmitz, 1897 accepted as Picconiella De Toni fil., 1936 (synonym)
101. Genus Rhodolophia Kylin, 1956 accepted as Erythrostachys J.Agardh ex Jean White, 1912 (synonym)
102. Genus Rhodosiphonia Hollenberg, 1943 accepted as Ophidocladus Falkenberg, 1897 (synonym)
103. Genus Ricardia Derbès & Solier, 1856 accepted as Erythrocystis J.Agardh, 1876 (synonym)
104. Genus Rytiphloea accepted as Rytiphlaea C.Agardh, 1817 (unaccepted > misspelling - incorrect subsequent spelling)
105. Genus Acanthochondria Weber-van Bosse, 1910 (uncertain)
106. Genus Dactylotus J.Agardh (uncertain > nomen dubium)

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