1. Species Trididemnum alexi Lambert, 2003
2. Species Trididemnum alleni Berrill, 1947
3. Species Trididemnum amiculum Kott, 2001
4. Species Trididemnum areolatum (Herdman, 1906)
5. Species Trididemnum auriculatum Michaelsen, 1919
6. Species Trididemnum banneri Eldredge, 1967
7. Species Trididemnum caelatum Kott, 2001
8. Species Trididemnum cerebriforme Hartmeyer, 1913
9. Species Trididemnum cereum (Giard, 1872)
10. Species Trididemnum clinides Kott, 1977
11. Species Trididemnum cristatum Kott, 2001
12. Species Trididemnum cyanophorum Lafargue & Duclaux, 1979
13. Species Trididemnum cyclops Michaelsen, 1921
14. Species Trididemnum delesseriae Lafargue, 1968
15. Species Trididemnum discrepans (Sluiter, 1909)
16. Species Trididemnum dispersum (Sluiter, 1909)
17. Species Trididemnum erythraeum Michaelsen, 1923
18. Species Trididemnum farrago Kott, 2004
19. Species Trididemnum fetia Monniot C. & Monniot F., 1987
20. Species Trididemnum grandistellatum Kott, 2008
21. Species Trididemnum granosum Sluiter, 1909
22. Species Trididemnum hians Monniot F., 1983
23. Species Trididemnum inarmatum (Drasche, 1883)
24. Species Trididemnum lanugineum Monniot F., 2010
25. Species Trididemnum lapidosum Kott, 2001
26. Species Trididemnum maragogi Rocha, 2002
27. Species Trididemnum maratuae Monniot F. & Monniot C., 2008
28. Species Trididemnum marmoratum (Sluiter, 1909)
29. Species Trididemnum mellitum Kott, 2005
30. Species Trididemnum meridionale Millar, 1953
31. Species Trididemnum microzoa (Redikorzev, 1913)
32. Species Trididemnum miniatum Kott, 1977
33. Species Trididemnum natalense Michaelsen, 1920
34. Species Trididemnum nebula Kott, 2007
35. Species Trididemnum nobile Kott, 2001
36. Species Trididemnum nubilum Kott, 1980
37. Species Trididemnum nubis Monniot F., 1991
38. Species Trididemnum opacum (Ritter, 1907)
39. Species Trididemnum orbiculatum (Van Name, 1902)
40. Species Trididemnum palmae Monniot F., 1984
41. Species Trididemnum paraclinides Kott, 1982
42. Species Trididemnum paracyclops Kott, 1980
43. Species Trididemnum pedunculatum Lafargue, Ramos-Espla, Buencuerpo & Vazquez, 1993
44. Species Trididemnum pigmentatum Kott, 2001
45. Species Trididemnum planum Sluiter, 1909
46. Species Trididemnum polyorchis Monniot F. & Monniot C., 1996
47. Species Trididemnum poma Monniot F. & Monniot C., 2001
48. Species Trididemnum profundum (Sluiter, 1909)
49. Species Trididemnum propinquum (Herdman, 1886)
50. Species Trididemnum pseudodiplosoma (Kott, 1962)
51. Species Trididemnum pusillum Kott, 2004
52. Species Trididemnum reticulatum Kott, 2004
53. Species Trididemnum rocasensis Paiva et al., 2015
54. Species Trididemnum roseum Plante & Vasseur, 1966
55. Species Trididemnum sansibaricum (Michaelsen, 1920)
56. Species Trididemnum savignii (Herdman, 1886)
57. Species Trididemnum shawi Page, Willis & Handley, 2014
58. Species Trididemnum sibogae (Hartmeyer, 1910)
59. Species Trididemnum sluiteri Brewin, 1958
60. Species Trididemnum solidum (Van Name, 1902)
61. Species Trididemnum spiculatum Kott, 1962
62. Species Trididemnum spongia Monniot F., 1991
63. Species Trididemnum spumosum Kott, 2001
64. Species Trididemnum strangulatum (Ritter, 1901)
65. Species Trididemnum strigosum Kott, 1980
66. Species Trididemnum tectum Kott, 2001
67. Species Trididemnum tenebricosum (Sluiter, 1909)
68. Species Trididemnum tenerum (Verrill, 1871)
69. Species Trididemnum thetidis Van Name, 1945
70. Species Trididemnum titanium Kott, 2007
71. Species Trididemnum tomarahi Monniot C. & Monniot F., 1987
72. Species Trididemnum translucidum (Lafargue, 1968)
73. Species Trididemnum vahaereere Monniot C. & Monniot F., 1987
74. Species Trididemnum vermiforme Kott, 2001
75. Species Trididemnum vostoki Romanov, 1989
76. Species Trididemnum africanum Michaelsen, 1915 accepted as Trididemnum cerebriforme Hartmeyer, 1913 (original combination)
77. Species Trididemnum aspiculatum Kott, 1957 accepted as Trididemnum profundum (Sluiter, 1909) (original combination)
78. Species Trididemnum atrocanum (Van Name, 1902) accepted as Trididemnum savignii (Herdman, 1886) (new combination)
79. Species Trididemnum crystallinum Kott, 2001 accepted as Trididemnum pseudodiplosoma (Kott, 1962) (original combination)
80. Species Trididemnum dellavallei Ritter & Forsyth, 1917 accepted as Trididemnum opacum (Ritter, 1907) (original combination)
81. Species Trididemnum dellavalley Ritter & Forsyth, 1917 accepted as Trididemnum opacum (Ritter, 1907) (literature misspelling)
82. Species Trididemnum fallax (Lahille, 1890) accepted as Trididemnum cereum (Giard, 1872) (synonym)
83. Species Trididemnum frondescens (Hartmeyer, 1911) accepted as Trididemnum sibogae (Hartmeyer, 1910) (new combination)
84. Species Trididemnum graphicum Lahille, 1890 accepted as Trididemnum cereum (Giard, 1872) (synonym)
85. Species Trididemnum inermum Monniot F. & Monniot C., 2001 accepted as Trididemnum pseudodiplosoma (Kott, 1962) (original combination)
86. Species Trididemnum lucidum (Van Name, 1902) accepted as Trididemnum savignii (Herdman, 1886) (new combination)
87. Species Trididemnum luderitzi Michaelsen, 1919 accepted as Trididemnum cerebriforme Hartmeyer, 1913 (original combination)
88. Species Trididemnum nube Monniot F., 1991 accepted as Trididemnum nubis Monniot F., 1991
89. Species Trididemnum porites (Van Name, 1902) accepted as Trididemnum savignii (Herdman, 1886) (new combination)
90. Species Trididemnum pullum (Sluiter, 1898) accepted as Trididemnum savignii (Herdman, 1886) (new combination)
91. Species Trididemnum savigney (Herdman, 1886) accepted as Trididemnum savignii (Herdman, 1886) (literature misspelling)
92. Species Trididemnum savignyi (Herdman, 1886) accepted as Trididemnum savignii (Herdman, 1886) (literature misspelling)
93. Species Trididemnum symbioticum Peres, 1962 accepted as Trididemnum cyclops Michaelsen, 1921 (original combination)
94. Species Trididemnum tegulum Kott, 1984 accepted as Trididemnum dispersum (Sluiter, 1909) (original combination)
95. Species Trididemnum tuberatum (Nott, 1892) accepted as Didemnum tuberatum (Nott, 1892) (new combination)
96. Species Trididemnum viride (Herdman, 1906) accepted as Didemnum viride (Herdman, 1906) (new combination)

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