1. Species Cryptonemia anconensis Acleto & Zúñiga, 2011
2. Species Cryptonemia angustata (Setchell & N.L.Gardner) E.Y.Dawson, 1954
3. Species Cryptonemia antricola C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
4. Species Cryptonemia atrocostalis C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
5. Species Cryptonemia baileyi Holmes
6. Species Cryptonemia basinervis B.M.Xia & Wang, 2004
7. Species Cryptonemia bengryi W.R.Taylor, 1960
8. Species Cryptonemia bermudensis (Collins & M.Howe) C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
9. Species Cryptonemia borealis Kylin, 1925
10. Species Cryptonemia caliculata A.B.Cribb, 1983
11. Species Cryptonemia chinchensis (W.R.Taylor) Acleto & Zúñiga, 2011
12. Species Cryptonemia coriacea F.Schmitz, 1895
13. Species Cryptonemia crenulata (J.Agardh) J.Agardh, 1851
14. Species Cryptonemia decolorata W.R.Taylor, 1945
15. Species Cryptonemia decumbens Weber-van Bosse, 1921
16. Species Cryptonemia delicatula Joly & Cordeiro, 1966
17. Species Cryptonemia denticulata J.Agardh, 1851
18. Species Cryptonemia digitata (J.Agardh) Womersley & J.A.Lewis, 1994
19. Species Cryptonemia flabellifolia Pinheiro-Joventino & E.C.Oliveira, 1977
20. Species Cryptonemia heteronema (M.Howe) Acleto & Zúñiga, 2011
21. Species Cryptonemia hibernica Guiry & L.M.Irvine, 1974
22. Species Cryptonemia kallymenioides (Harvey) Kraft, 1982
23. Species Cryptonemia lacunicola C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
24. Species Cryptonemia latissima J.Agardh, 1876
25. Species Cryptonemia limensis (Kützing) J.A.Lewis, 1990
26. Species Cryptonemia lobata (Howe) M.E.Ramírez, 1989
27. Species Cryptonemia lomation (Bertoloni) J.Agardh, 1851
28. Species Cryptonemia longiarticulata Funk, 1955
29. Species Cryptonemia natalensis (J.Agardh) Chiang, 1970
30. Species Cryptonemia nitophylloides (J.Agardh) J.A.Lewis, 1994
31. Species Cryptonemia obovata J.Agardh, 1876
32. Species Cryptonemia opuntioides E.Y.Dawson, 1966
33. Species Cryptonemia palmetta (S.G.Gmelin) Woelkering, G.Furnari, Cormaci & McNeill, 2019
34. Species Cryptonemia papenfussii Chiang, 1970
35. Species Cryptonemia parva Zhang & B.M.Xia, 1983
36. Species Cryptonemia peltata E.Y.Dawson, M.Neushul & R.D.Wildman, 1960
37. Species Cryptonemia perparva C.W.Schneider, C.E.Lane & G.W.Saunders, 2018
38. Species Cryptonemia phyllantoides J.Agardh, 1854
39. Species Cryptonemia prolifera Levring, 1941
40. Species Cryptonemia seminervis (C.Agardh) J.Agardh, 1846
41. Species Cryptonemia semiprocumbens Tanaka, 1963
42. Species Cryptonemia subdichotoma Womersley & A.Bailey, 1970
43. Species Cryptonemia taylorii I.A.Abbott, 1967
44. Species Cryptonemia tenuis J.Agardh, 1898
45. Species Cryptonemia tuniformis (Bertoloni) Zanardini, 1868
46. Species Cryptonemia undulata Sonder, 1855
47. Species Cryptonemia veleroae (Dawson) E.Y.Dawson, 1954
48. Species Cryptonemia wilsonis J.Agardh, 1885
49. Species Cryptonemia xinhaiensis B.M.Xia & Wang, 2004
50. Species Cryptonemia yendoi Weber-van Bosse, 1921
51. Species Cryptonemia angusta Okamura, 1895 accepted as Grateloupia angusta (Okamura) S.Kawaguchi & H.W.Wang, 2001
52. Species Cryptonemia capitellata Sonder, 1871 accepted as Carpopeltis capitellata (Sonder) F.Schmitz, 1897
53. Species Cryptonemia chiangii Acleto, 1973 accepted as Cryptonemia chinchensis (W.R.Taylor) Acleto & Zúñiga, 2011 (synonym)
54. Species Cryptonemia corviacea Schmitz accepted as Cryptonemia coriacea F.Schmitz, 1895 (misspelling)
55. Species Cryptonemia decipiens Harvey, 1863 accepted as Carpopeltis decipiens (Harvey) De Toni, 1905
56. Species Cryptonemia dichotoma J.Agardh, 1842 accepted as Euhymenia dichotoma (J.Agardh) Kützing, 1849 (synonym)
57. Species Cryptonemia elata (Harvey) J.Agardh, 1876 accepted as Carpopeltis elata (Harvey) De Toni, 1905
58. Species Cryptonemia forbesii Harvey accepted as Neurocaulon foliosum (Meneghini) Zanardini ex Kützing, 1849
59. Species Cryptonemia guaymasensis (E.Y.Dawson) E.Y.Dawson, 1954 accepted as Cryptonemia limensis (Kützing) J.A.Lewis, 1990
60. Species Cryptonemia lactuca J.Agardh, 1842 accepted as Cryptonemia lomation (Bertoloni) J.Agardh, 1851
61. Species Cryptonemia lanceolata Okamura, 1895 accepted as Grateloupia schmitziana (Okamura) S.Kawaguchi & H.W.Wang, 2001 (synonym)
62. Species Cryptonemia lapathifolia (Kützing) Acleto & Zúñiga, 2011 accepted as Mariaramirezia lapathifolia (Kützing) Molinari & Guiry, 2021
63. Species 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
64. Species Cryptonemia luxurians (C.Agardh) J.Agardh, 1851 accepted as Cryptonemia seminervis (C.Agardh) J.Agardh, 1846 (synonym)
65. Species Cryptonemia multicornis (Kützing) Sonder, 1871 accepted as Carpopeltis maillardii (Montagne & Millardet) Chiang, 1970 (synonym)
66. Species Cryptonemia ovalifolia Kylin, 1941 accepted as Isabbottia ovalifolia (Kylin) Balakrishnan, 1980
67. Species Cryptonemia peruviana Acleto, 1973 accepted as Cryptonemia limensis (Kützing) J.A.Lewis, 1990 (synonym)
68. Species Cryptonemia phyllophora (Hooker f. & Harvey) J.Agardh, 1872 accepted as Carpopeltis phyllophora (J.D.Hooker & Harvey) F.Schmitz, 1897
69. Species Cryptonemia rigida Harvey ex J.Agardh, 1876 accepted as Carpopeltis maillardii (Montagne & Millardet) Chiang, 1970
70. Species Cryptonemia rotunda (Okamura) Kawaguchi, 1993 accepted as Galene rotunda (Okamura) D'Archino & Zuccarello, 2014
71. Species Cryptonemia schmitziana (Okamura) Okamura, 1910 accepted as Grateloupia schmitziana (Okamura) S.Kawaguchi & H.W.Wang, 2001
72. Species Cryptonemia tunaeformis (A.Bertolini) Zanardini accepted as Cryptonemia tuniformis (Bertoloni) Zanardini, 1868
73. Species Cryptonemia umbraticola E.Y.Dawson, 1959 accepted as Dissimularia umbraticola (E.Y.Dawson) G.T.Kraft & G.W.Saunders, 2014
74. Species Cryptonemia vidovichii (Meneghini) Zanardini, 1843 accepted as Acrodiscus vidovichii (Meneghini) Zanardini, 1868 (synonym)
75. Species Cryptonemia beaui Crouan & Crouan, 1868 (uncertain, uncertain taxonomic status subjected to verification)

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