1. Species Ceratium arcticum (Ehrenberg) Cleve, 1901
2. Species Ceratium axiale Kofoid, 1907
3. Species Ceratium brachyceros Daday, 1907
4. Species Ceratium brevearcuatum Bohm, 1976
5. Species Ceratium brevicorne A.Hempel, 1896
6. Species Ceratium candelabum
7. Species Ceratium carolinianum (Bailey) Jörgensen, 1911
8. Species Ceratium cornutum (Ehrenberg) Claparède & J.Lachmann, 1859
9. Species Ceratium denticulatum (Jörgensen) Paulsen, 1931
10. Species Ceratium divaricatum (Lemmermann) Kofoid, 1908
11. Species Ceratium furcoides (Levander) Langhans, 1925
12. Species Ceratium hirundinella (O.F.Müller) Dujardin, 1841
13. Species Ceratium monoceras Temponeras, 2000
14. Species Ceratium pacificum E.J.F.Wood, 1963
15. Species Ceratium patentissimum Ostenfeld & Johannes Schmidt, 1901
16. Species Ceratium pleuroceras Schrank, 1793
17. Species Ceratium porrectum Karsten, 1907
18. Species Ceratium rhomvoides B.Hickel, 1988
19. Species Ceratium seta (Ehrenberg) W.S.Kent, 1881
20. Species Ceratium tenue Ostenfeld & Schmidt, 1901
21. Species Ceratium varians Mangin, 1922
22. Species Ceratium aequatoriale Schröder, 1906 accepted as Tripos aequatorialis (Schröder) F.Gómez, 2013
23. Species Ceratium aestuarium Schroder, 1911 accepted as Ceratium hexacanthum var. aestuarium (Schroder) J.Schiller, 1937 accepted as Tripos aestuarius (Schröder) F.Gómez, 2013 (synonym)
24. Species Ceratium allieri Gourret, 1883 accepted as Tripos candelabrum (Ehrenberg) F.Gómez, 2013 (unaccepted > junior subjective synonym)
25. Species Ceratium angustum A.S.Campbell, 1934 accepted as Tripos angustus (A.S.Campbell) F.Gómez, 2013 (validity)
26. Species Ceratium arcticum Vanhöffen, 1897 accepted as Tripos arcticus (Vanhöffen) F.Gómez, 2013
27. Species Ceratium arcuatum (Gourret) Pavillard accepted as Neoceratium euarcuatum (Jörgensen) F.Gómez, D.Moreira & P.Lopez-Garcia, 2010 accepted as Tripos euarcuatus (Jørgensen) F.Gómez, 2013 (synonym)
28. Species Ceratium arcuatum (Gourret) Cleve, 1900 accepted as Tripos muelleri var. arcuatus (Gourret) F.Gómez, 2013 (synonym)
29. Species Ceratium arietinum Cleve, 1900 accepted as Tripos arietinus (Cleve) F.Gómez, 2021
30. Species Ceratium aultii H.W.Graham & Bronikovsky, 1944 accepted as Tripos aultii (H.W.Graham & Bronikovsky) F. Gómez, 2014 (Validity)
31. Species Ceratium austriacum Zederbauer, 1904 accepted as Ceratium hirundinella f. austriacum (Zederbauer) Bachmann, 1911
32. Species Ceratium azoricum Cleve, 1900 accepted as Tripos azoricus (Cleve) F.Gómez, 2013 (synonym)
33. Species Ceratium balechii Maeve del Castillo, Okolodkov & Zamudio, 2003 accepted as Tripos balechii (Meave del Castillo, Okolodkov & M.E.Zamudio) F.Gómez, 2013 (Validity)
34. Species Ceratium batavum Paulsen, 1908 accepted as Tripos batavus (Paulsen) F.Gómez, 2013 (synonym)
35. Species Ceratium belone Cleve, 1900 accepted as Tripos belone (Cleve) F.Gómez, 2013
36. Species Ceratium berghii Gourret, 1883 accepted as Tripos fusus (Ehrenberg) F.Gómez, 2013 (unaccepted > junior subjective synonym)
37. Species Ceratium biceps Claparède & Lachmann, 1859 accepted as Tripos biceps (Claparède & Lachmann) F.Gómez, 2013 (synonym)
38. Species Ceratium biconicum Murray & Whitting, 1899 accepted as Centrodinium biconicum (Murray & Whitting) F.J.R.Taylor, 1976
39. Species Ceratium bicorne Gourret, 1883 accepted as Tripos bicornis (Gourret) F.Gómez, 2013
40. Species Ceratium bigelowii Kofoid, 1907 accepted as Tripos bigelowii (Kofoid) F.Gómez, 2013
41. Species Ceratium boehmii H.W.Graham & Bronikovsky, 1944 accepted as Tripos boehmii (H.W.Graham & Bronikovsky) F.Gómez, 2013 (synonym)
42. Species Ceratium breve (Ostenfeld & Schmidt) Schröder, 1906 accepted as Tripos brevis (Ostenfeld & Johannes Schmidt) F.Gómez, 2013
43. Species Ceratium brevicorne Zacharias, 1905 accepted as Ceratium hirundinella (O.F.Müller) Dujardin, 1841 (synonym)
44. Species Ceratium brunellii Rampi, 1942 accepted as Tripos brunellii (Rampi) F.Gómez, 2013
45. Species Ceratium bucephalum (Cleve) Cleve, 1900 accepted as Tripos bucephalus (Cleve) F.Gómez, 2013 (synonym)
46. Species Ceratium buceros Zacharias, 1906 accepted as Tripos buceros (Zacharias) F.Gómez, 2013 (synonym)
47. Species Ceratium californiense Kofoid, 1907 accepted as Tripos californiensis (Kofoid) F.Gómez, 2013 (synonym)
48. Species Ceratium candelabrum (Ehrenberg) F.Stein, 1883 accepted as Tripos candelabrum (Ehrenberg) F.Gómez, 2013
49. Species Ceratium carinthiacum Zederbauer, 1904 accepted as Ceratium hirundinella f. carinthiacum (Zederbauer) Bachmann, 1911
50. Species Ceratium carnegiei H.W.Graham & Bronikovsky, 1944 accepted as Tripos carnegiei (H.W.Graham & Bronikovsky) F.Gómez, 2013
51. Species Ceratium carriense Gourret, 1883 accepted as Tripos carriensis (Gourret) F.Gómez, 2013 (synonym)
52. Species Ceratium cephalotum (Lemmermann) Jörgensen, 1911 accepted as Tripos cephalotus (Lemmermann) F.Gómez, 2013
53. Species Ceratium ceylanicum Schröder, 1906 accepted as Tripos ceylanicus (Schröder) F.Gómez, 2013
54. Species Ceratium claviger Kofoid, 1907 accepted as Tripos claviger (Kofoid) F.Gómez, 2013 (synonym)
55. Species Ceratium coarctatum Pavillard, 1905 accepted as Tripos coarctatus (Pavillard) F.Gómez, 2013 (synonym)
56. Species Ceratium compressum Gran, 1912 accepted as Tripos compressus (Gran) F.Gómez, 2013
57. Species Ceratium concilians Jörgensen, 1920 accepted as Tripos concilians (Jørgensen) F.Gómez, 2013
58. Species Ceratium contortum (Gourret) Cleve, 1900 accepted as Tripos contortus (Gourret) F.Gómez, 2013
59. Species Ceratium contrarium (Gourret) Pavillard, 1905 accepted as Tripos contrarius (Gourret) F.Gómez, 2013
60. Species Ceratium curvicorne Schmidt, 1901 accepted as Tripos brevis (Ostenfeld & Johannes Schmidt) F.Gómez, 2013 (synonym)
61. Species Ceratium curvicorne (Daday) Cleve, 1900 accepted as Tripos curvicornis (Daday) F.Gómez, 2013
62. Species Ceratium curvirostre Huitfeld-Kaas, 1901 accepted as Ceratium carolinianum (Bailey) Jörgensen, 1911 (synonym)
63. Species Ceratium declinatum (Karsten) Jørgensen, 1911 accepted as Tripos declinatus (G.Karsten) F.Gómez, 2013
64. Species Ceratium declinatum G.Karsten, 1907 accepted as Tripos declinatus (G.Karsten) F.Gómez, 2013 (synonym)
65. Species Ceratium deflexum (Kofoid) Jörgensen, 1911 accepted as Tripos deflexus (Kofoid) F.Gómez, 2013
66. Species Ceratium dens Ostenfeld & J.Schmidt, 1901 accepted as Tripos dens (Ostenfeld & Johannes Schmidt) F.Gómez, 2013
67. Species Ceratium depressum Gourret, 1883 accepted as Tripos candelabrum (Ehrenberg) F.Gómez, 2013
68. Species Ceratium digitatum F.Schütt, 1895 accepted as Tripos digitatus (F.Schütt) F.Gómez, 2013
69. Species Ceratium dilatatum Gourret, 1883 accepted as Tripos candelabrum (Ehrenberg) F.Gómez, 2013
70. Species Ceratium divergens (Ehrenberg) Claparède & Lachmann, 1859 accepted as Protoperidinium divergens (Ehrenberg) Balech, 1974
71. Species Ceratium egyptiacum Halim, 1963 accepted as Tripos egyptiacus (Halim) F.Gómez, 2013 (Validity)
72. Species Ceratium ehrenbergii Kofoid, 1907 accepted as Tripos ehrenbergii (Kofoid) F.Gómez, 2013 (Validity)
73. Species Ceratium elegans Schröder, 1906 accepted as Tripos elegans (Schröder) F.Gómez, 2013
74. Species Ceratium elongatum (Skuja) Morling, 1980 accepted as Ceratium carolinianum var. elongatum Skuja, 1964 (synonym)
75. Species Ceratium euarcuatum Jørgensen, 1920 accepted as Tripos euarcuatus (Jørgensen) F.Gómez, 2013
76. Species Ceratium eugrammum Kofoid accepted as Neoceratium minutum (Jörgensen) F.Gómez, D.Moreira & P.López-Garcia, 2010 accepted as Tripos minutus (E.G.Jørgensen) F.Gómez, 2013 (synonym)
77. Species Ceratium eugrammum (Ehrenberg) W.S.Kent, 1881 accepted as Tripos eugrammus (Ehrenberg) F.Gómez, 2013 (synonym)
78. Species Ceratium extensum (Gourret) Cleve-Euler, 1900 accepted as Tripos extensus (Gourret) F.Gómez, 2013
79. Species Ceratium falcatiforme Jörgensen, 1920 accepted as Tripos falcatiformis (Jørgensen) F.Gómez, 2013
80. Species Ceratium falcatum (Kofoid) Jörgensen, 1920 accepted as Tripos falcatus (Kofoid) F.Gómez, 2013
81. Species Ceratium filicorne Steemann Nielsen, 1934 accepted as Tripos filicornis (Steemann Nielsen) F.Gómez, 2013
82. Species Ceratium flagelliferum Cleve, 1900 accepted as Tripos flagelliferus (Cleve) F.Gómez, 2013 (synonym)
83. Species Ceratium furca (Ehrenberg) Claparède & Lachmann, 1859 accepted as Tripos furca (Ehrenberg) F.Gómez, 2013
84. Species Ceratium fusus (Ehrenberg) Dujardin, 1841 accepted as Tripos fusus (Ehrenberg) F.Gómez, 2013
85. Species Ceratium gallicum Kofoid, 1907 accepted as Tripos gallicus (Kofoid) F.Gómez, 2013 (synonym)
86. Species Ceratium geniculatum (Lemmermann) Cleve, 1901 accepted as Tripos geniculatus (Lemmermann) F.Gómez, 2013
87. Species Ceratium gibberum Gourret, 1883 accepted as Tripos gibberus (Gourret) F.Gómez, 1883
88. Species Ceratium globatum Gourret, 1883 accepted as Tripos candelabrum (Ehrenberg) F.Gómez, 2013 (synonym)
89. Species Ceratium globosum Gourret, 1883 accepted as Tripos globosus (Gourret) F.Gómez, 2013
90. Species Ceratium gracile (Gourret) Jorgensen, 1911 accepted as Neoceratium symmetricum (Pavillard) F.Gómez, D.Moreira & P.Lopez-Garcia, 2010 accepted as Tripos symmetricus (Pavillard) F.Gómez, 2013 (synonym)
91. Species Ceratium gracile Pavillard, 1905 accepted as Tripos gracilis (Pavillard) F.Gómez, 2013
92. Species Ceratium gravidum Gourret, 1883 accepted as Tripos gravidus (Gourret) F.Gómez, 2013
93. Species Ceratium handelii Skuja, 1937 accepted as Ceratium hirundinella (O.F.Müller) Dujardin, 1841 (synonym)
94. Species Ceratium heterocamptum (Jörgensen) Ostenfeld & Schmidt, 1901 accepted as Tripos heterocamptus (Jörgenen) F.Gómez, 2013
95. Species Ceratium hexacanthum Gourret, 1883 accepted as Tripos hexacanthus (Gourret) F.Gómez, 2013
96. Species Ceratium hircus Schröder, 1909 accepted as Tripos hircus (Schröder) F.Gómez, 2013
97. Species Ceratium horridum (Cleve) Gran, 1902 accepted as Tripos horridus (Cleve) F.Gómez, 2013
98. Species Ceratium humile Jörgensen, 1911 accepted as Tripos humilis (Jörgenen) F.Gómez, 2013 (synonym)
99. Species Ceratium hundhausenii Schröder, 1906 accepted as Tripos hundhausenii (Schröder) F.Gómez, 2013 (synonym)
100. Species Ceratium hyperboreum Cleve, 1900 accepted as Tripos hyperboreus (Cleve) F.Gómez, 2013
101. Species Ceratium incisum (G.Karsten) Jørgensen, 1911 accepted as Tripos incisus (Karsten) F.Gómez, 2013
102. Species Ceratium inclinatum Kofoid, 1907 accepted as Tripos inclinatus (Kofoid) F.Gómez, 2013 (synonym)
103. Species Ceratium inflatum (Kofoid) E.G.Jørgensen, 1911 accepted as Tripos inflatus (Kofoid) F.Gómez, 2013
104. Species Ceratium intermedium (Jorgensen) Jorgensen, 1905 accepted as Tripos intermedius (Jörgenen) F.Gómez, 2013 (synonym)
105. Species Ceratium inversum Karsten, 1907 accepted as Tripos inversus (Karsten) F.Gómez, 2013
106. Species Ceratium japonicum Schröder, 1906 accepted as Tripos japonicus (Schröder) F.Gómez, 2013 (synonym)
107. Species Ceratium karstenii Pavillard, 1907 accepted as Tripos karstenii (Pavillard) F.Gómez, 1907
108. Species Ceratium kofoidii Jørgensen, 1911 accepted as Tripos kofoidii (E.G.Jørgensen) F.Gómez, 2013
109. Species Ceratium kumaonense H.J.Carter, 1871 accepted as Ceratium hirundinella (O.F.Müller) Dujardin, 1841 (synonym)
110. Species Ceratium labradoricum Vanhoffen, 1897 accepted as Neoceratium arcticum (Ehrenberg) F.Gómez, D.Moreira & P.López-Garcia, 2010 accepted as Ceratium arcticum (Ehrenberg) Cleve, 1901 (synonym)
111. Species Ceratium lamellicorne Kofoid, 1908 accepted as Tripos lamellicornis (Kofoid) F.Gómez, 2013 (synonym)
112. Species Ceratium lanceolatum Kofoid, 1907 accepted as Tripos lanceolatus (Kofoid) F.Gómez, 2013 (Validity)
113. Species Ceratium leptoceras Zacharias, 1904 accepted as Ceratium hirundinella (O.F.Müller) Dujardin, 1841 (synonym)
114. Species Ceratium leptosomum Jörgensen, 1911 accepted as Tripos leptosomus (E.G.Jørgensen) F.Gómez, 2013 (synonym)
115. Species Ceratium limulus (Pouchet) Gourret, 1883 accepted as Tripos limulus (Pouchet) F.Gómez, 2013
116. Species Ceratium lineatum (Ehrenberg) Cleve, 1899 accepted as Tripos lineatus (Ehrenberg) F.Gómez, 2013
117. Species Ceratium longicorne Perty, 1849 accepted as Ceratium hirundinella (O.F.Müller) Dujardin, 1841 (synonym)
118. Species Ceratium longinum (Karsten) Jörgensen, 1911 accepted as Tripos longinus (Karsten) F.Gómez, 2013 (synonym)
119. Species Ceratium longipes (Bailey) Gran, 1902 accepted as Tripos longipes (Bailey) F.Gómez, 2013
120. Species Ceratium longirostrum Gourret, 1883 accepted as Tripos longirostrum (Gourret) Hallegraeff & Huisman, 2020
121. Species Ceratium longissimum (Schröder) Kofoid, 1907 (unaccepted, synonym)
122. Species Ceratium lunula Schimper ex Karsten, 1906 (unaccepted)
123. Species Ceratium macroceras Schrank, 1802 (unaccepted, synonym)
124. Species Ceratium macroceros (Ehrenberg) Vanhöffen, 1897 (unaccepted)
125. Species Ceratium macroceros (Ehrenberg) Cleve, 1899 (unaccepted, synonym)
126. Species Ceratium massiliense (Gourret) Karsten, 1906 (unaccepted)
127. Species Ceratium michaelis (Ehrenberg) W.S.Kent, 1881 (unaccepted, synonym)
128. Species Ceratium minus Gourret, 1883 (unaccepted)
129. Species Ceratium minutum Jörgensen, 1920 (unaccepted)
130. Species Ceratium molle Kofoid, 1907 (unaccepted)
131. Species Ceratium mollis Kofoid, 1907 (unaccepted, synonym)
132. Species Ceratium neglectum Ostenfeld, 1903 (unaccepted, synonym)
133. Species Ceratium nipponicum Okamura (unaccepted, synonym)
134. Species Ceratium obesum Pavillard, 1930 (unaccepted, synonym)
135. Species Ceratium obliquum Gourret, 1883 (unaccepted)
136. Species Ceratium obtusum Gourret, 1883 (unaccepted)
137. Species Ceratium okamurae Schröder, 1906 (unaccepted)
138. Species Ceratium ostenfeldii Kofoid, 1907 (unaccepted)
139. Species Ceratium oviforme Daday, 1888 (unaccepted, synonym)
140. Species Ceratium pacificum Schröder, 1906 (unaccepted)
141. Species Ceratium palmatum (Schroder) Schroder (unaccepted, synonym)
142. Species Ceratium paradoxides Cleve, 1900 (unaccepted)
143. Species Ceratium parvum Gourret, 1883 (unaccepted)
144. Species Ceratium pavillardii Jørgensen, 1911 (unaccepted)
145. Species Ceratium pellucidum Gourret, 1883 (unaccepted)
146. Species Ceratium pennatum Kofoid, 1907 (unaccepted)
147. Species Ceratium pentagonum Gourret, 1883 (unaccepted)
148. Species Ceratium petersii Steemann Nielsen, 1934 (unaccepted)
149. Species Ceratium piburgense Zederbauer, 1904 (unaccepted)
150. Species Ceratium platicornis Daday, 1888 (unaccepted, justified emendation)
151. Species Ceratium platycorne Daday, 1888 (unaccepted, basionym)
152. Species Ceratium praelongum (Lemmermann) Kofoid ex Jörgensen, 1911 (unaccepted)
153. Species Ceratium praeolongum (Lemmermann) Kofoid ex Jørgensen, 1911 (unaccepted, synonym)
154. Species Ceratium procerum Gourret, 1883 (unaccepted)
155. Species Ceratium protuberans (Karsten) Paulsen, 1931 (unaccepted)
156. Species Ceratium pulchellum Schröder, 1906 (unaccepted)
157. Species Ceratium pumilum Zacharias, 1905 (unaccepted, synonym)
158. Species Ceratium ramakrishnae Subrahmanyan, 1968 (unaccepted, synonym)
159. Species Ceratium ranipes Cleve, 1900 (unaccepted)
160. Species Ceratium recurvatum Schröder, 1906 (unaccepted, synonym)
161. Species Ceratium recurvum (Jørgensen) Reinecke, 1973 (unaccepted, synonym)
162. Species Ceratium reflexum Cleve, 1900 (unaccepted)
163. Species Ceratium reticulatum (Pouchet) Cleve, 1900 (unaccepted, synonym)
164. Species Ceratium robustum Ostenfeld & Johannes Schmidt, 1901 (unaccepted, synonym)
165. Species Ceratium rostellum Gourret, 1883 (unaccepted)
166. Species Ceratium saltans Schröder, 1906 (unaccepted, synonym)
167. Species Ceratium scapiforme Kofoid, 1907 (unaccepted, synonym)
168. Species Ceratium schmidtii Jørgensen, 1911 (unaccepted, synonym)
169. Species Ceratium schrankii Kofoid, 1907 (unaccepted, synonym)
170. Species Ceratium schroederi Nie, 1936 (unaccepted, synonym)
171. Species Ceratium schroeteri B.Schröder, 1906 (unaccepted)
172. Species Ceratium setaceum Jørgensen, 1911 (unaccepted)
173. Species Ceratium strictum (Okamura & Nishikawa) Kofoid, 1906 (unaccepted, synonym)
174. Species Ceratium subcontortum Schröder, 1906 (unaccepted)
175. Species Ceratium subrobustum (Jorgensen) Steemann Nielsen, 1934 (unaccepted, synonym)
176. Species Ceratium subsalsum (Ostenfeld) Apstein, 1911 (unaccepted)
177. Species Ceratium sumatranum (Karsten) Jørgensen, 1911 (unaccepted, synonym)
178. Species Ceratium symmetricum Pavillard, 1905 (unaccepted)
179. Species Ceratium tasmaniae E.J.F.Wood, 1963 (unaccepted, Validity)
180. Species Ceratium tenuissimum Kofoid, 1907 (unaccepted, synonym)
181. Species Ceratium teres Kofoid, 1907 (unaccepted)
182. Species Ceratium tetraceras Schrank, 1793 (unaccepted, synonym)
183. Species Ceratium tricarinatum Kofoid, 1907 (unaccepted, synonym)
184. Species Ceratium trichoceros (Ehrenberg) Kofoid, 1881 (unaccepted)
185. Species Ceratium tripodioides (Jorgensen) Steemann Nielsen, 1934 (unaccepted, synonym)
186. Species Ceratium tripos (O.F.Müller) Nitzsch, 1817 (unaccepted)
187. Species Ceratium uncinus Sournia, 1972 (unaccepted, Validity)
188. Species Ceratium undulatum Schröder, 1906 (unaccepted, synonym)
189. Species Ceratium uteri A.S.Campbell, 1934 (unaccepted, Validity)
190. Species Ceratium volans Cleve, 1900 (unaccepted, synonym)
191. Species Ceratium vultur Cleve, 1900 (unaccepted, synonym)
192. Species Ceratium fuscus (Pritchard) J.Adams, 1907 (uncertain, uncertain taxonomic status subjected to verification)
193. Species Ceratium inflatum N.Peters, 1934 (uncertain, uncertain taxonomic status subjected to verification)
194. Species Ceratium inflexum (Gourret) Schröder (uncertain, uncertain taxonomic status subjected to verification)
195. Species Ceratium quinqueforme Gourret, 1883 (uncertain > unassessed)

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