1. Species Symplectoscyphus acutustriatus Galea, 2019
2. Species Symplectoscyphus adpressus (Ritchie, 1911)
3. Species Symplectoscyphus aggregatus (Jäderholm, 1917)
4. Species Symplectoscyphus amoenus Vervoort & Watson, 2003
5. Species Symplectoscyphus amphoriferus (Allman, 1877)
6. Species Symplectoscyphus anae Peña Cantero, Svoboda & Vervoort, 2002
7. Species Symplectoscyphus arboriformis (Marktanner-Turneretscher, 1890)
8. Species Symplectoscyphus bathyalis Vervoort, 1972
9. Species Symplectoscyphus bathypacificus Vervoort, 1993
10. Species Symplectoscyphus bellingshauseni Peña Cantero, 2012
11. Species Symplectoscyphus candelabrum Vervoort & Watson, 2003
12. Species Symplectoscyphus chubuticus El Beshbeeshy, 2011
13. Species Symplectoscyphus columnarius (Briggs, 1914)
14. Species Symplectoscyphus commensalis Vervoort, 1993
15. Species Symplectoscyphus confusus Totton, 1930
16. Species Symplectoscyphus cumberlandicus (Jädherholm, 1905)
17. Species Symplectoscyphus curvatus (Jäderholm, 1917)
18. Species Symplectoscyphus densus Peña Cantero, 2017
19. Species Symplectoscyphus dentiferus (Torrey, 1902)
20. Species Symplectoscyphus divaricatus (Busk, 1852)
21. Species Symplectoscyphus effusus Vervoort, 1993
22. Species Symplectoscyphus elegans (Nutting, 1904)
23. Species Symplectoscyphus elongatulus Galea, 2019
24. Species Symplectoscyphus epizoicus Watson, 1973
25. Species Symplectoscyphus epizooticus Totton, 1930
26. Species Symplectoscyphus erectus (Naumov & Stepanjants, 1962) (accepted > unreplaced junior homonym, secondary homonym of Symplectoscyphus erectus (Fraser, 1938) )
27. Species Symplectoscyphus erectus (Fraser, 1938)
28. Species Symplectoscyphus exochus Blanco, 1982
29. Species Symplectoscyphus exsertus (Allman, 1888)
30. Species Symplectoscyphus fasciculatus Galea, 2016
31. Species Symplectoscyphus filiformis (Allman, 1888)
32. Species Symplectoscyphus flexilis (Hartlaub, 1901)
33. Species Symplectoscyphus frigidus Peña Cantero, Svoboda & Vervoort, 2002
34. Species Symplectoscyphus frondosus Peña Cantero, 2010
35. Species Symplectoscyphus fuscus (Trebilcock, 1928)
36. Species Symplectoscyphus glacialis (Jäderholm, 1904)
37. Species Symplectoscyphus hero Blanco, 1977
38. Species Symplectoscyphus hesperides Peña Cantero, 2012
39. Species Symplectoscyphus howensis Vervoort & Watson, 2003
40. Species Symplectoscyphus hydrallmaniaeformis (Kudelin, 1914)
41. Species Symplectoscyphus indivisus (Bale, 1882)
42. Species Symplectoscyphus infractus (Kirchenpauer, 1884)
43. Species Symplectoscyphus interruptus (Pfeffer, 1889)
44. Species Symplectoscyphus johnstoni (Gray, 1843)
45. Species Symplectoscyphus laevis (Bale, 1882)
46. Species Symplectoscyphus leloupi El Beshbeeshy, 2011
47. Species Symplectoscyphus levinseni (Nutting, 1904)
48. Species Symplectoscyphus liouvillei (Billard, 1914)
49. Species Symplectoscyphus longithecus (Bale, 1888)
50. Species Symplectoscyphus macrocarpus (Billard, 1918)
51. Species Symplectoscyphus macroscyphus Vervoort & Watson, 2003
52. Species Symplectoscyphus macrothecus (Bale, 1882)
53. Species Symplectoscyphus magellanicus (Marktanner-Turneretscher, 1890)
54. Species Symplectoscyphus magnificus Peña Cantero & Vervoort, 2009
55. Species Symplectoscyphus margaritaceus (Allman, 1885)
56. Species Symplectoscyphus marionensis Millard, 1971
57. Species Symplectoscyphus millardi (Stepanjants, 1979)
58. Species Symplectoscyphus milneanus (D'Orbigny, 1842)
59. Species Symplectoscyphus minutus (Nutting, 1904)
60. Species Symplectoscyphus modestus (Hartlaub, 1901)
61. Species Symplectoscyphus monopleura (Hartlaub, 1901)
62. Species Symplectoscyphus multinodus (Fraser, 1948)
63. Species Symplectoscyphus naumovi Blanco, 1969
64. Species Symplectoscyphus neglectus (Thompson, 1879)
65. Species Symplectoscyphus nesioticus Blanco, 1977
66. Species Symplectoscyphus odontiferus Vervoort & Watson, 2003
67. Species Symplectoscyphus pallidus (Kirchenpauer, 1884)
68. Species Symplectoscyphus paraglacialis El Beshbeeshy, 2011
69. Species Symplectoscyphus patagonicus Galea & Schories, 2012
70. Species Symplectoscyphus paucicatillus Galea, 2016
71. Species Symplectoscyphus paulensis Stechow, 1923
72. Species Symplectoscyphus pedunculatus (Billard, 1919)
73. Species Symplectoscyphus pinnatus (Clark, 1877)
74. Species Symplectoscyphus pirsa Watson, 2018
75. Species Symplectoscyphus plectilis (Hickson & Gravely, 1907)
76. Species Symplectoscyphus procerus (Trebilcock, 1928)
77. Species Symplectoscyphus pseudocolumnarius Vervoort, 1993
78. Species Symplectoscyphus pseudodivaricatus Ralph, 1961
79. Species Symplectoscyphus pseudofrondosus Pena Cantero, 2023
80. Species Symplectoscyphus pulchellus (Jäderholm, 1904)
81. Species Symplectoscyphus pushi (Stepanjants, 1979)
82. Species Symplectoscyphus pygmaeus (Bale, 1882)
83. Species Symplectoscyphus ralphae Vervoort, 1993
84. Species Symplectoscyphus rentoni (Bartlett, 1907)
85. Species Symplectoscyphus ritchiei (Briggs, 1915)
86. Species Symplectoscyphus rostratus Watson, 1973
87. Species Symplectoscyphus rubellus (Kirchenpauer, 1884)
88. Species Symplectoscyphus salvadorensis El Beshbeeshy, 2011
89. Species Symplectoscyphus secundus (Kirchenpauer, 1884)
90. Species Symplectoscyphus semper Galea & Schories, 2014
91. Species Symplectoscyphus sibogae (Billard, 1924)
92. Species Symplectoscyphus sieboldi (Kirchenpauer, 1884)
93. Species Symplectoscyphus similis (Fraser, 1948)
94. Species Symplectoscyphus singularis El Beshbeeshy, 2011
95. Species Symplectoscyphus sofiae Peña Cantero, Svoboda & Vervoort, 2002
96. Species Symplectoscyphus spiraliformis Vervoort & Watson, 2003
97. Species Symplectoscyphus subarticulatus (Coughtrey, 1875)
98. Species Symplectoscyphus subdichotomus (Kirchenpauer, 1884)
99. Species Symplectoscyphus tortuosus Pena Cantero, 2023
100. Species Symplectoscyphus trabeculatus Peña Cantero, 2023
101. Species Symplectoscyphus tricuspidatus (Alder, 1856)
102. Species Symplectoscyphus trimucronatus (Allman, 1885)
103. Species Symplectoscyphus tropicus (Hartlaub, 1901)
104. Species Symplectoscyphus tuba Totton, 1930
105. Species Symplectoscyphus unilateralis (Lamouroux, 1824)
106. Species Symplectoscyphus valdesicus El Beshbeeshy, 2011
107. Species Symplectoscyphus vanhoeffeni Totton, 1930
108. Species Symplectoscyphus vervoorti El Beshbeeshy, 2011
109. Species Symplectoscyphus weddelli Peña Cantero, Svoboda & Vervoort, 2002
110. Species Symplectoscyphus amphorifer (Allman, 1877) accepted as Symplectoscyphus amphoriferus (Allman, 1877)
111. Species Symplectoscyphus australis Marktanner-Turneretscher, 1890 accepted as Symplectoscyphus johnstoni (Gray, 1843) (unaccepted > junior subjective synonym, synonym)
112. Species Symplectoscyphus biformis (Jäderholm, 1905) accepted as Antarctoscyphus biformis (Jäderholm, 1905)
113. Species Symplectoscyphus constrictus Totton, 1930 accepted as Gonaxia constricta (Totton, 1930) (basionym)
114. Species Symplectoscyphus densestriatus Tang, 1991 accepted as Symplectoscyphus naumovi Blanco, 1969 (unaccepted > junior subjective synonym, synonym)
115. Species Symplectoscyphus elongatus (Jäderholm, 1904) accepted as Antarctoscyphus elongatus (Jäderholm, 1904)
116. Species Symplectoscyphus gotoi (Stechow, 1913) accepted as Xingyurella gotoi (Stechow, 1913)
117. Species Symplectoscyphus grandis Blanco, 1977 accepted as Antarctoscyphus grandis (Blanco, 1977) (synonym)
118. Species Symplectoscyphus hozawai Stechow, 1931 accepted as Fraseroscyphus hozawai (Stechow, 1931) (genus transfer)
119. Species Symplectoscyphus huanghaiensis Tang & Huang, 1986 accepted as Fraseroscyphus hozawai (Stechow, 1931) (synonym)
120. Species Symplectoscyphus incisus (Fraser, 1938) accepted as Sertularella incisa Fraser, 1938
121. Species Symplectoscyphus irregularis (Trebilcock, 1928) accepted as Fraseroscyphus irregularis (Trebilcock, 1928) (genus transfer)
122. Species Symplectoscyphus macrocarpa (Billard, 1918) accepted as Symplectoscyphus macrocarpus (Billard, 1918) (gender suffix incorrect)
123. Species Symplectoscyphus macrogonus (Trebilcock, 1928) accepted as Fraseroscyphus macrogonus (Trebilcock, 1928) (genus transfer)
124. Species Symplectoscyphus macrotheca (Bale, 1882) accepted as Symplectoscyphus macrothecus (Bale, 1882) (gender suffix change)
125. Species Symplectoscyphus mawsoni Briggs, 1939 accepted as Antarctoscyphus mawsoni (Briggs, 1939) (basionym)
126. Species Symplectoscyphus pedrensis (Torrey, 1904) accepted as Xingyurella pedrensis (Torrey, 1904)
127. Species Symplectoscyphus quadrifidus (Hartlaub, 1901) accepted as Sertularella quadrifida Hartlaub, 1901 (wrong genus)
128. Species Symplectoscyphus sinuosus (Fraser, 1948) accepted as Fraseroscyphus sinuosus (Fraser, 1948) accepted as Fraseroscyphus hozawai (Stechow, 1931) (genus transfer)
129. Species Symplectoscyphus spiralis (Hickson & Gravely, 1907) accepted as Antarctoscyphus spiralis (Hickson & Gravely, 1907) (genus transfer)
130. Species Symplectoscyphus spiritualis Totton, 1930 accepted as Symplectoscyphus johnstoni (Gray, 1843) (synonym)
131. Species Symplectoscyphus turgidus (Trask, 1857) accepted as Xingyurella turgida (Trask, 1857)
132. Species Symplectoscyphus variablis (Bale, 1888) accepted as Symplectoscyphus indivisus (Bale, 1882) (synonym)
133. Species Symplectoscyphus watsonae Vervoort, 1993 accepted as Dictyocladium watsonae (Vervoort, 1993) (genus transfer)
134. Species Symplectoscyphus pluma (Hartlaub, 1901) (uncertain > taxon inquirendum)

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