• Abbotia araneosa Perestenko, 1975 accepted as Neoabbottiella araneosa (Perestenko) S.C.Lindstrom, 1985
• Abbottia araneosa L.P.Perestenko, 1997 accepted as Neoabbottiella araneosa (Perestenko) S.C.Lindstrom, 1985
• Acrodiscus crenulatus (J.Agardh) De Toni, 1905 accepted as Cryptonemia crenulata (J.Agardh) J.Agardh, 1851
• Acrodiscus denticulatus (J.Agardh) De Toni, 1905 accepted as Cryptonemia denticulata J.Agardh, 1851
• Acrodiscus vidovichii (Meneghini) Zanardini, 1868
• Acrodiscus vidovichii f. cochlearis Ercegovic, 1949 accepted as Acrodiscus vidovichii (Meneghini) Zanardini, 1868
• Aeodes digitata F.Schmitz, 1921 (uncertain)
• Aeodes dilatata Yamada
• Aeodes ecuadoreana W.R.Taylor, 1945 accepted as Schizymenia ecuadoreana (W.R.Taylor) I.A.Abbott, 1967
• Aeodes gardneri Kylin, 1925 accepted as Halymenia gardneri (Kylin) P.G.Parkinson, 1980
• Aeodes lanceolata Okamura, 1934 accepted as Pachymeniopsis lanceolata (Okamura) Yamada ex Kawabata, 1954
• Aeodes lanceolata var. tenuis Okamura, 1934
• Aeodes marginata (Roussel) F.Schmitz, 1894 accepted as Felicinia marginata (Roussel) Manghisi, Le Gall, Ribera, Gargiulo & Morabito, 2014
• Aeodes nitidissima J.Agardh, 1876
• Aeodes orbitosa (Suhr) F.Schmitz, 1894 accepted as Pachymenia orbitosa (Suhr) L.K.Russell, 2009
• Aeodes ulvoidea F.Schmitz, 1894 accepted as Pachymenia ulvoidea (F.Schmitz) L.K.Russell, 2010
• Amalthea freemaniae D'Archino & W.A.Nelson, 2014
• Amalthea rubida H.W.Lee & M.S.Kim, 2016
• Austroepiphloea bullosa (Harvey) Molinari, Sánchez Ocharan & Guiry, 2021 accepted as Halymenia bullosa (Harvey) Huisman, Rodríguez-Prieto & Showe M.Lin, 2022
• Blastophye wilsonis (J.Agardh) J.Agardh, 1892 accepted as Cryptonemia wilsonis J.Agardh, 1885
• Carpopeltis affinis (Harvey) Okamura, 1934 accepted as Polyopes affinis (Harvey) Kawaguchi & Wang, 2002
• Carpopeltis affinis f. minuta Okamura, 1936
• Carpopeltis angusta (Okamura) Okamura, 1899 accepted as Grateloupia angusta (Okamura) S.Kawaguchi & H.W.Wang, 2001
• Carpopeltis articulata (Okamura) Okamura, 1909 accepted as Grateloupia articulata (Okamura) S.Kawaguchi & H.W.Wang, 2001
• Carpopeltis beckeri F.Schmitz, 1921
• Carpopeltis bushiae (Farlow) Kylin, 1956
• Carpopeltis capitellata (Sonder) F.Schmitz, 1897
• Carpopeltis clarionensis (Setchell & N.L.Gardner) E.Y.Dawson, 1959 accepted as Grateloupia clarionensis (Setchell & N.L.Gardner) S.Kawaguchi & H.W.Wang, 2001
• Carpopeltis cornea (Okamura) Okamura, 1936 accepted as Grateloupia cornea Okamura, 1913
• Carpopeltis crispata Okamura, 1934 accepted as Grateloupia crispata (Okamura) Y.-P.Lee, 2008
• Carpopeltis decipiens (Harvey) De Toni, 1905
• Carpopeltis divaricata Okamura, 1934 accepted as Grateloupia chiangii S.Kawaguchi & H.W.Wang, 2001
• Carpopeltis elata (Harvey) De Toni, 1905
• Carpopeltis elata (Okamura) Okamura, 1909 accepted as Prionitis elata Okamura, 1899 accepted as Grateloupia elata (Okamura) S.Kawaguchi & H.W.Wang, 2001
• Carpopeltis flabellata (Holmes) Okamura, 1935 accepted as Polyopes prolifer (Hariot) Kawaguchi & Wang, 2002
• Carpopeltis formosa Okamura accepted as Carpopeltis formosana Okamura, 1931 accepted as Yonagunia formosana (Okamura) Kawaguchi & Masuda, 2004
• Carpopeltis formosana Okamura, 1931 accepted as Yonagunia formosana (Okamura) Kawaguchi & Masuda, 2004
• Carpopeltis maillardii (Montagne & Millardet) Chiang, 1970
• Carpopeltis okamurae Arwidsson, 1938 accepted as Prionitis elata Okamura, 1899 accepted as Grateloupia elata (Okamura) S.Kawaguchi & H.W.Wang, 2001
• Carpopeltis phyllophora (J.D.Hooker & Harvey) F.Schmitz, 1897
• Carpopeltis prolifera (Hariot) Kawaguchi & Masuda, 1984 accepted as Polyopes prolifer (Hariot) Kawaguchi & Wang, 2002
• Carpopeltis rigida (Harvey ex J.Agardh) F.Schmitz, 1895 accepted as Carpopeltis maillardii (Montagne & Millardet) Chiang, 1970
• Carpopeltis spongeaplexa Womersley & J.A.Lewis, 1994
• Carpopeltis spongeoplexus Womersley & J.A.Lewis, 1994
• Carpopeltis stella-polaris E.Y.Dawson, 1959
• Carpopeltis vaigeensis Weber-van Bosse, 1921
• Carpopeltis zollingeri (Sonder) De Toni, 1924 accepted as Yonagunia zollingeri (Sonder) G.H.Boo, J.K.Park, G.S.Gerung & S.M.Boo, 2013
• Codiophyllum bunburyense (J.Agardh) F.Schmitz, 1889 accepted as Codiophyllum flabelliforme (Sonder) F.Schmitz, 1895
• Codiophyllum decipiens (J.Agardh) F.Schmitz, 1895 accepted as Carpopeltis spongeaplexa Womersley & J.A.Lewis, 1994
• Codiophyllum flabelliforme (Sonder) F.Schmitz, 1895
• Codiophyllum marchesettioides (J.Agardh) De Toni, 1905 accepted as Codiophyllum flabelliforme (Sonder) F.Schmitz, 1895
• Codiophyllum natalense J.E.Gray, 1872
• Codiophyllum spongioides (J.Agardh) DeToni, 1905 accepted as Codiophyllum flabelliforme (Sonder) F.Schmitz, 1895
• Codiophyllum squamarioides (J.Agardh) De Toni, 1905 accepted as Codiophyllum flabelliforme (Sonder) F.Schmitz, 1895
• Corynomorpha clavata (Harvey) J.Agardh, 1872
• Corynomorpha prismatica (J.Agardh) J.Agardh, 1876
• Cryptonemia anconensis Acleto & Zúñiga, 2011
• Cryptonemia angusta Okamura, 1895 accepted as Grateloupia angusta (Okamura) S.Kawaguchi & H.W.Wang, 2001
• Cryptonemia angustata (Setchell & N.L.Gardner) E.Y.Dawson, 1954
• Cryptonemia antricola C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
• Cryptonemia atrocostalis C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
• Cryptonemia baileyi Holmes
• Cryptonemia basinervis B.M.Xia & Wang, 2004
• Cryptonemia beaui Crouan & Crouan, 1868 (uncertain)
• Cryptonemia bengryi W.R.Taylor, 1960
• Cryptonemia bermudensis (Collins & M.Howe) C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
• Cryptonemia borealis Kylin, 1925
• Cryptonemia caliculata A.B.Cribb, 1983
• Cryptonemia capitellata Sonder, 1871 accepted as Carpopeltis capitellata (Sonder) F.Schmitz, 1897
• Cryptonemia chiangii Acleto, 1973 accepted as Cryptonemia chinchensis (W.R.Taylor) Acleto & Zúñiga, 2011
• Cryptonemia chinchensis (W.R.Taylor) Acleto & Zúñiga, 2011
• Cryptonemia coriacea F.Schmitz, 1895
• Cryptonemia corviacea Schmitz accepted as Cryptonemia coriacea F.Schmitz, 1895
• Cryptonemia crenulata (J.Agardh) J.Agardh, 1851
• Cryptonemia decipiens Harvey, 1863 accepted as Carpopeltis decipiens (Harvey) De Toni, 1905
• Cryptonemia decolorata W.R.Taylor, 1945
• Cryptonemia decumbens Weber-van Bosse, 1921
• Cryptonemia delicatula Joly & Cordeiro, 1966
• Cryptonemia delicatula subsp. venezuelensis Ganesan
• Cryptonemia denticulata J.Agardh, 1851
• Cryptonemia dichotoma J.Agardh, 1842 accepted as Euhymenia dichotoma (J.Agardh) Kützing, 1849
• Cryptonemia digitata (J.Agardh) Womersley & J.A.Lewis, 1994
• Cryptonemia elata (Harvey) J.Agardh, 1876 accepted as Carpopeltis elata (Harvey) De Toni, 1905
• Cryptonemia flabellifolia Pinheiro-Joventino & E.C.Oliveira, 1977
• Cryptonemia forbesii Harvey accepted as Neurocaulon foliosum (Meneghini) Zanardini ex Kützing, 1849
• Cryptonemia guaymasensis (E.Y.Dawson) E.Y.Dawson, 1954 accepted as Cryptonemia limensis (Kützing) J.A.Lewis, 1990
• Cryptonemia heteronema (M.Howe) Acleto & Zúñiga, 2011
• Cryptonemia hibernica Guiry & L.M.Irvine, 1974
• Cryptonemia kallymenioides (Harvey) Kraft, 1982
• Cryptonemia lactuca J.Agardh, 1842 accepted as Cryptonemia lomation (Bertoloni) J.Agardh, 1851
• Cryptonemia lactuca f. seminervis (C.Agardh) Sauvageau, 1897 accepted as Cryptonemia seminervis (C.Agardh) J.Agardh, 1846
• Cryptonemia lacunicola C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
• Cryptonemia lanceolata Okamura, 1895 accepted as Grateloupia schmitziana (Okamura) S.Kawaguchi & H.W.Wang, 2001
• Cryptonemia lapathifolia (Kützing) Acleto & Zúñiga, 2011 accepted as Mariaramirezia lapathifolia (Kützing) Molinari & Guiry, 2021
• Cryptonemia latissima J.Agardh, 1876
• Cryptonemia ligulata (Harvey ex Kützing) J.Agardh, 1876 accepted as Polyopes ligulatus (Harvey ex Kützing) De Toni, 1905 accepted as Yonagunia ligulata (Harvey ex Kützing) Manghisi, M.Morabito, De Clerck & Le Gall, 2015
• Cryptonemia limensis (Kützing) J.A.Lewis, 1990
• Cryptonemia lobata (Howe) M.E.Ramírez, 1989
• Cryptonemia lomation (Bertoloni) J.Agardh, 1851
• Cryptonemia longiarticulata Funk, 1955