1. Species Rhodoglossum alcicorne Stegenga, Bolton & R.J.Anderson, 1997
2. Species Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley, 1993
3. Species Rhodoglossum jardinii (J.Agardh) Kylin, 1932
4. Species Rhodoglossum latissimum (J.D.Hooker & Harvey) J.Agardh, 1876
5. Species Rhodoglossum pulchrum (Kützing) Setchell & N.L.Gardner, 1936
6. Species Rhodoglossum revolutum Baardseth, 1941
7. Species Rhodoglossum affine (Harvey) Kylin, 1928 accepted as Mazzaella affinis (Harvey) Fredericq, 1993
8. Species Rhodoglossum americanum Kylin, 1941 accepted as Mazzaella californica (J.Agardh) G.De Toni, 1936
9. Species Rhodoglossum californicum (J.Agardh) I.A.Abbott, 1971 accepted as Mazzaella californica (J.Agardh) G.De Toni, 1936
10. Species Rhodoglossum cobinae E.Y.Dawson, 1961 accepted as Mazzaella cobinae (E.Y.Dawson) Fredericq, 1993
11. Species Rhodoglossum coriaceum E.Y.Dawson, 1946 accepted as Mazzaella coriacea (E.Y.Dawson) Hughey, 1999
12. Species Rhodoglossum denticulatum E.Y.Dawson, Acleto & Foldvik, 1964 accepted as Mazzaella denticulata (E.Y.Dawson, Acleto & Foldvik) Fredericq, 1993
13. Species Rhodoglossum diffusum E.Y.Dawson, 1961 accepted as Mazzaella diffusa (E.Y.Dawson) J.N.Norris & Fredericq, 2014
14. Species Rhodoglossum digitatum E.Y.Dawson, 1961 accepted as Mazzaella digitata (E.Y.Dawson) J.N.Norris & Fredericq, 2014
15. Species Rhodoglossum expansum (D.H.Kim) V.J.Chapman, 1979 accepted as Iridaea latissima (J.D.Hooker & Harvey) Grunow, 1867
16. Species Rhodoglossum foliiferum (Harvey) J.Agardh, 1876 accepted as Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley, 1993
17. Species Rhodoglossum hancockii E.Y.Dawson, 1944 accepted as Mazzaella hancockii (E.Y.Dawson) Fredericq, 1993
18. Species Rhodoglossum hemisphaericum Mikami, 1995 accepted as Mazzaella hemisphaerica (Mikami) Yoshida, 1997
19. Species Rhodoglossum japonicum Mikami, 1965 accepted as Mazzaella japonica (Mikami) Hommersand, 1993
20. Species Rhodoglossum lanceolatum (Harvey) J.Agardh, 1876 accepted as Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley, 1993
21. Species Rhodoglossum linguiforme E.Y.Dawson, 1958 accepted as Mazzaella volans (C.Agardh) Fredericq, 1993
22. Species Rhodoglossum macrodontum (Skottsberg) Setchell & N.L.Gardner, 1936 accepted as Iridaea cordata (Turner) Bory, 1826
23. Species Rhodoglossum minimum Hollenberg, 1969 accepted as Mazzaella minima (Hollenberg) P.W.Gabrielson, 2000
24. Species Rhodoglossum owensiae Hollenberg & I.A.Abbott, 1968 accepted as Mazzaella californica (J.Agardh) G.De Toni, 1936
25. Species Rhodoglossum parvum G.M.Smith & Hollenberg, 1943 accepted as Mazzaella parva (G.M.Smith & Hollenberg) Hughey, P.C.Silva & Hommersand, 2002
26. Species Rhodoglossum phyllocarpum (Postels & Ruprecht) A.D.Zinova, 1962 accepted as Mazzaella phyllocarpa (Postels & Ruprecht) Perestenko, 1996
27. Species Rhodoglossum polycarpum J.Agardh, 1876 accepted as Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley, 1993
28. Species Rhodoglossum proliferum J.Agardh, 1885 accepted as Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley, 1993
29. Species Rhodoglossum purpureum J.Agardh, 1876 accepted as Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley, 1993
30. Species Rhodoglossum roseum (Kylin) G.M.Smith, 1943 accepted as Mazzaella rosea (Kylin) Fredericq, 1993
31. Species Rhodoglossum schotteri Delépine, 1964 accepted as Iridaea cordata (Turner) Bory, 1826
32. Species Rhodoglossum tasmanicum J.Agardh, 1879 accepted as Rhodoglossum gigartinoides (Sonder) Edyvane & Womersley, 1993

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