1. Subgenus Chaetoceros (Hyalochaete)
2. Subgenus Chaetoceros (Phaeoceros) Gran
   1. Species Chaetoceros (Phaeoceros) dadayi Pavillard, 1913 accepted as Chaetoceros dadayi Pavillard, 1913 (uncertain > unassessed)
3. Species Chaetoceros acadianus Samanta & Porcher in Kaczmarska et al., 2019
4. Species Chaetoceros affinis Lauder, 1864
5. Species Chaetoceros anastomosans Grunow, 1882
6. Species Chaetoceros angularis Schütt, 1895
7. Species Chaetoceros anostomosans
8. Species Chaetoceros atlanticus Cleve, 1873
9. Species Chaetoceros bifurcatus X.J. Xu, Yang Li & Lundholm in Xu et al., 2019
10. Species Chaetoceros boreale
11. Species Chaetoceros borealis Bailey, 1854
12. Species Chaetoceros brevis F.Schütt, 1895
13. Species Chaetoceros brevispinosus X.J.Xu, Yang Li & Lundholm
14. Species Chaetoceros bulbosus (Ehrenberg) Heiden, 1928
15. Species Chaetoceros cinctus Gran, 1897
16. Species Chaetoceros circinalis (Meunier) K.G. Jensen & Moestrup, 1998
17. Species Chaetoceros coarctatus Lauder, 1864
18. Species Chaetoceros cochleus F.Schütt
19. Species Chaetoceros coloradensis Li & Kociolek, 2016
20. Species Chaetoceros compressus Lauder, 1864
21. Species Chaetoceros concavicornis Mangin, 1917
22. Species Chaetoceros constrictus Gran, 1897
23. Species Chaetoceros convolutus Castracane, 1886
24. Species Chaetoceros crinitus F.Schütt, 1895
25. Species Chaetoceros criophilus Castracane, 1886
26. Species Chaetoceros curvatus Castracane, 1886
27. Species Chaetoceros curvisetus Cleve, 1889
28. Species Chaetoceros dadayi Pavillard, 1913
29. Species Chaetoceros dayaensis Li & Zhu, 2015
30. Species Chaetoceros debilis Cleve, 1894 emend Xu, Y.Li & Lundholm in Xu et al., 2020
31. Species Chaetoceros decipiens Cleve, 1873
32. Species Chaetoceros densus (Cleve) Cleve, 1899
33. Species Chaetoceros denticulata H.S.Lauder
34. Species Chaetoceros denticulatus
35. Species Chaetoceros dichaeta Ehrenberg, 1844
36. Species Chaetoceros didymus Ehrenberg, 1845
37. Species Chaetoceros diversus Cleve, 1873
38. Species Chaetoceros elongatus Honigmann, 1909
39. Species Chaetoceros filiformis Meunier, 1910
40. Species Chaetoceros furcillatus Bailey, 1856
41. Species Chaetoceros galeatus X.J. Xu & Yang Li in Xu et al., 2020
42. Species Chaetoceros gelidus Chamnansinp, Li, Lundholm & Moestrup, 2013
43. Species Chaetoceros glaciale A.F.Meunier
44. Species Chaetoceros glandazii Mangin, 1910
45. Species Chaetoceros hispidus (Ehrenberg) T.Brightwell
46. Species Chaetoceros holsaticus F.Schütt, 1895
47. Species Chaetoceros imbricatus Mangin, 1912
48. Species Chaetoceros incurvus Bailey
49. Species Chaetoceros jouseanus R. M. Gogorev, 2006
50. Species Chaetoceros laciniosus F.Schütt, 1895
51. Species Chaetoceros leve F.Schütt
52. Species Chaetoceros lorenzianus Grunow, 1863
53. Species Chaetoceros mertensii Honigmann, 1909
54. Species Chaetoceros millipedarius X.J. Xu, Yang Li & Lundholm in Xu et al., 2019
55. Species Chaetoceros muelleri Lemmermann, 1898
56. Species Chaetoceros neogracilis VanLand., 1968
57. Species Chaetoceros nipponicus J.Ikari
58. Species Chaetoceros ornatus (Chamnansinp, Moestrup & Lundholm) X.J.Xu, Yang Li & Lundholm
59. Species Chaetoceros pacificus J.Ikari
60. Species Chaetoceros paradoxus Cleve, 1873
61. Species Chaetoceros pauciramosus Z. Y. Chen, N. Lund- holm, Ø. Moestrup, J. Kownacka & Y. Li, 2018
62. Species Chaetoceros pelagicus Cleve
63. Species Chaetoceros pendulus Karsten, 1905
64. Species Chaetoceros peruvianum Brightwell, 1856
65. Species Chaetoceros proschkinae Gogorev, 2006
66. Species Chaetoceros pseudocrinitus Ostenfeld, 1901
67. Species Chaetoceros pseudocurvisetum L. Mangin, 1910
68. Species Chaetoceros rotosporus Li, Lundholm & Moestrup, 2013
69. Species Chaetoceros schuettii Cleve
70. Species Chaetoceros secundus Cleve, 1873
71. Species Chaetoceros setoense J.Ikari
72. Species Chaetoceros seychellarus Karsten, 1907
73. Species Chaetoceros similis Cleve, 1896
74. Species Chaetoceros simplex Ostenfeld, 1902
75. Species Chaetoceros sociale H.S. Lauder, 1864
76. Species Chaetoceros socialis H.S.Lauder, 1864
77. Species Chaetoceros subcoronatus Krasske, 1941
78. Species Chaetoceros subtilis Cleve, 1896
79. Species Chaetoceros tenuissimus Meunier, 1913
80. Species Chaetoceros teres Cleve, 1896
81. Species Chaetoceros thienemannii Hustedt, 1925
82. Species Chaetoceros vermiculus F.Schütt
83. Species Chaetoceros wighamii Brightwell, 1856
84. Species Chaetoceros zachariasi
85. Species Chaetoceros zachariasii Honigmann, 1909
86. Species Chaetoceros adhaerens Mangin, 1913 accepted as Chaetoceros costatus Pavillard, 1911 (Synonym)
87. Species Chaetoceros affine Lauder, 1864 accepted as Chaetoceros affinis Lauder, 1864
88. Species Chaetoceros balticum P.T. Cleve, 1896 accepted as
89. Species Chaetoceros bottnicus Cleve, 1896 accepted as Chaetoceros wighamii Brightwell, 1856
90. Species Chaetoceros debile Cleve, 1894 accepted as Chaetoceros debilis Cleve, 1894 emend Xu, Y.Li & Lundholm in Xu et al., 2020
91. Species Chaetoceros delicatulum C.E.H.Ostenfeld, 1901 accepted as Chaetoceros delicatulus Ostenfeld, 1902
92. Species Chaetoceros densum (Cleve) Cleve, 1899 accepted as Chaetoceros densus (Cleve) Cleve, 1899
93. Species Chaetoceros dichaetus Ehrenberg, 1844 accepted as Chaetoceros dichaeta Ehrenberg, 1844 (incorrect genus gender agreement)
94. Species Chaetoceros didymum Ehrenb., 1845 accepted as Chaetoceros didymus Ehrenberg, 1845 (spelling variation)
95. Species Chaetoceros furca Cleve, 1897 accepted as Chaetoceros messanense Castracane, 1875 (synonym)
96. Species Chaetoceros gracile Apstein, 1909 accepted as Chaetoceros ceratosporus Ostenfeld, 1910 (synonym)
97. Species Chaetoceros gracilis Schütt, 1895 accepted as Chaetoceros neogracile S.L.VanLandingham, 1968 accepted as Chaetoceros neogracilis VanLand., 1968 (Synonym)
98. Species Chaetoceros groenlandicus Cleve, 1896 accepted as Chaetoceros diadema (Ehrenberg) Gran, 1897 accepted as Syndendrium diadema Ehrenberg, 1854 † (Synonym)
99. Species Chaetoceros hiemale Cleve, 1900 accepted as Chaetoceros brevis F.Schütt, 1895
100. Species Chaetoceros impressus K.G.Jensen & Moestrup, 1998 accepted as Chaetoceros castracanei Karsten, 1905 (synonym)
101. Species Chaetoceros janischianus Castracane, 1886 accepted as Chaetoceros dichaetus Ehrenberg, 1844 accepted as Chaetoceros dichaeta Ehrenberg, 1844 (Synonym)
102. Species Chaetoceros messanensis Castracane, 1875 accepted as Chaetoceros messanense Castracane, 1875
103. Species Chaetoceros neapolitanus Schroeder, 1900 accepted as Chaetoceros atlanticus var. neapolitanus (Schroeder) Hustedt, 1930 (synonym)
104. Species Chaetoceros neogracile S.L.VanLandingham, 1968 accepted as Chaetoceros neogracilis VanLand., 1968
105. Species Chaetoceros paradoxus Peragallo, 1897 accepted as Chaetoceros diadema (Ehrenberg) Gran, 1897 accepted as Syndendrium diadema Ehrenberg, 1854 † (Synonym)
106. Species Chaetoceros peruvianum Brightw., 1856 accepted as Chaetoceros peruvianum Brightwell, 1856 (AphiaID resurrection)
107. Species Chaetoceros polygonus Schütt, 1895 accepted as Chaetoceros atlanticus Cleve, 1873
108. Species Chaetoceros pseudobreve Pavillard, 1911 accepted as Chaetoceros brevis F.Schütt, 1895
109. Species Chaetoceros pseudosimilis Cleve-Euler accepted as Chaetoceros pseudosimile Cleve-Euler, 1937
110. Species Chaetoceros schuttii Cleve accepted as Chaetoceros affinis Lauder, 1864
111. Species Chaetoceros septentrionalis Østrup, 1895 accepted as Attheya septentrionalis (Østrup) R.M.Crawford, 1994 accepted as Chaetoceros septentrionalis Cleve, 1896 (synonym)
112. Species Chaetoceros abnormis Proschkina-Lavrenko, 1953 (uncertain > unassessed)
113. Species Chaetoceros aculeatus Makarova, 1962 (uncertain > unassessed)
114. Species Chaetoceros adelianium E. Manguin, 1960 (uncertain > unassessed)
115. Species Chaetoceros adelianum E. Manguin, 1957 (uncertain > unassessed)
116. Species Chaetoceros adhaereus L. Mangin, 1913 (uncertain > unassessed)
117. Species Chaetoceros adriaticus B.Schussnig, 1915 (uncertain > unassessed)
118. Species Chaetoceros aduncus Suchanova, 1971 (uncertain > unassessed)
119. Species Chaetoceros aequatorialis Cleve, 1873 (uncertain > unassessed)
120. Species Chaetoceros aequatorialis Yendo, 1905 (uncertain > unassessed)
121. Species Chaetoceros amanita Cleve-Euler, 1915 (uncertain > unassessed)
122. Species Chaetoceros ambiguus A.P. Jousé, 1978 (uncertain > unassessed)
123. Species Chaetoceros anastomosans Gran, 1905 (uncertain > unassessed)
124. Species Chaetoceros anglicum (Grunow in Van Heurck) Ostenfeld, 1902 accepted as Chaetoceros anglicus Grunow in Van Heurck, 1882 (uncertain > unassessed)
125. Species Chaetoceros anglicus Grunow in Van Heurck, 1882 (uncertain > unassessed)
126. Species Chaetoceros angulatum Schütt, 1895 (uncertain > unassessed)
127. Species Chaetoceros antarcticum (uncertain > unassessed)
128. Species Chaetoceros apendiculatus Müller-Melchers, 1953 (uncertain > unassessed)
129. Species Chaetoceros approximatus Gran & Angst, 1931 (uncertain > unassessed)
130. Species Chaetoceros armatus T.West, 1860 (uncertain > unassessed)
131. Species Chaetoceros astrabadicus Henckel, 1909 (uncertain > unassessed)
132. Species Chaetoceros asymmetricus J. Fenner in Fenner & Mikkelsen, 1990 (uncertain > unassessed)
133. Species Chaetoceros atlanticum (uncertain > unassessed)
134. Species Chaetoceros atlanticus Okamura, 1907 (uncertain > unassessed)
135. Species Chaetoceros atlantidae Müller-Melchers, 1953 (uncertain > unassessed)
136. Species Chaetoceros audax F.Schütt, 1895 (uncertain > unassessed)
137. Species Chaetoceros aurivillii Cleve, 1901 (uncertain > unassessed)
138. Species Chaetoceros bacillaria Ehrenberg, 1844 (uncertain > unassessed)
139. Species Chaetoceros bacteriastroides G.H.H.Karsten, 1907 (uncertain > unassessed)
140. Species Chaetoceros bacteriastrum (uncertain > unassessed)
141. Species Chaetoceros baculites Meunier, 1910 (uncertain > unassessed)
142. Species Chaetoceros balticus Cleve, 1896 (uncertain > unassessed)
143. Species Chaetoceros barbatum (Ehrenberg) Brightwell, 1856 accepted as Goniothecium barbatum (Ehrenberg) Ehrenberg, 1854 accepted as Rhizosolenia barbata Ehrenberg, 1844 (uncertain > unassessed)
144. Species Chaetoceros bermejensis Hernandez-Becerril, 1991 (uncertain > unassessed)
145. Species Chaetoceros biconcavus Gran, 1897 (uncertain > unassessed)
146. Species Chaetoceros bicoronata Mereschkowsky, 1899 (uncertain > unassessed)
147. Species Chaetoceros biharensis Pantocsek, 1892 (uncertain > unassessed)
148. Species Chaetoceros bisetaceum Schumann, 1867 (uncertain > unassessed)
149. Species Chaetoceros boreali Lauder, 1864 (uncertain > unassessed)
150. Species Chaetoceros borealis Schutt, 1893 (uncertain > unassessed)
151. Species Chaetoceros borealoides Honigmann, 1909 (uncertain > unassessed)
152. Species Chaetoceros borgei Lemmermann, 1904 (uncertain > unassessed)
153. Species Chaetoceros borskowii Pantocsek, 1909 (uncertain > unassessed)
154. Species Chaetoceros breve Schütt, 1895 (uncertain > unassessed)
155. Species Chaetoceros brevisetum Aksentjev (Axentjev), 1930 (uncertain > unassessed)
156. Species Chaetoceros brevispinus (Castracane) De Toni, 1894 accepted as Bacteriastrum brevispinum Castracane, 1886 (uncertain > unassessed)
157. Species Chaetoceros brightwellii (Cleve) Cleve, 1901 accepted as Chaetoceros borealis var. brightwellii (Cleve) Cleve (uncertain > unassessed)
158. Species Chaetoceros brussilowi Henckel, 1925 (uncertain > unassessed)
159. Species Chaetoceros buceros Karsten, 1907 (uncertain > unassessed)
160. Species Chaetoceros bulbosum (uncertain > unassessed)
161. Species Chaetoceros bungei Honigmann, 1909 (uncertain > unassessed)
162. Species Chaetoceros calcitrans (Paulsen) Takano, 1968 accepted as Chaetoceros simplex var. calcitrans Paulsen, 1905 (uncertain > unassessed)
163. Species Chaetoceros californicum Grunow in Van Heurck, 1883 (uncertain > unassessed)
164. Species Chaetoceros calvus Cleve, 1901 (uncertain > unassessed)
165. Species Chaetoceros capense Karsten, 1905 (uncertain > unassessed)
166. Species Chaetoceros capreolus (Ehrenberg) L.W. Bailey, 1910 accepted as Dicladia capreolus Ehrenberg, 1845 † (uncertain > unassessed)
167. Species Chaetoceros capricornianus Taylor, 1967 (uncertain > unassessed)
168. Species Chaetoceros caspicum (uncertain > unassessed)
169. Species Chaetoceros caspicus Ostenfeld, 1920 (uncertain > unassessed)
170. Species Chaetoceros caspius Cleve in Lonnberg, 1900 (uncertain > unassessed)
171. Species Chaetoceros castracanei Karsten, 1905 (uncertain > unassessed)
172. Species Chaetoceros cellulosum Lauder, 1864 (uncertain > unassessed)
173. Species Chaetoceros ceratospermum (uncertain > unassessed)
174. Species Chaetoceros ceratosporum (uncertain > unassessed)
175. Species Chaetoceros ceratosporus Ostenfeld, 1910 (uncertain > unassessed)
176. Species Chaetoceros chilensis Krasske, 1941 (uncertain > unassessed)
177. Species Chaetoceros chinchae Mereschkowsky, 1899 (uncertain > unassessed)
178. Species Chaetoceros chunii Karsten, 1905 (uncertain > unassessed)
179. Species Chaetoceros ciliata Lauder, 1864 (uncertain > unassessed)
180. Species Chaetoceros clavigera Ostenfeld, 1902 (uncertain > unassessed)
181. Species Chaetoceros clavigerum Grunow, 1884 (uncertain > unassessed)
182. Species Chaetoceros clevei Schütt, 1895 (uncertain > unassessed)
183. Species Chaetoceros clevei Peragallo & Peragallo, 1904 (uncertain > unassessed)
184. Species Chaetoceros coarctus (uncertain > unassessed)
185. Species Chaetoceros cochlea Schütt, 1895 (uncertain > unassessed)
186. Species Chaetoceros commutatus Cleve, 1896 (uncertain > unassessed)
187. Species Chaetoceros compacta Cleve, 1897 (uncertain > unassessed)
188. Species Chaetoceros compactum Ikari, 1928 (uncertain > unassessed)
189. Species Chaetoceros compactus Schütt, 1895 (uncertain > unassessed)
190. Species Chaetoceros compressus Cleve, 1894 (uncertain > unassessed)
191. Species Chaetoceros concretum (Cleve & Grunow) Engler, 1883 accepted as Chaetoceros decipiens var. concreta Grunow (uncertain > unassessed)
192. Species Chaetoceros confertus Müller-Melchers, 1953 (uncertain > unassessed)
193. Species Chaetoceros confervoides Ralfs in Pritchard, 1861 (uncertain > unassessed)
194. Species Chaetoceros confusum VanLandingham, 1968 (uncertain > unassessed)
195. Species Chaetoceros connivens Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
196. Species Chaetoceros contortus Schütt, 1895 (uncertain > unassessed)
197. Species Chaetoceros convexicornis Mangin, 1919 (uncertain > unassessed)
198. Species Chaetoceros convolutum (uncertain > unassessed)
199. Species Chaetoceros cornigerum Jousé, 1959 (uncertain > unassessed)
200. Species Chaetoceros cornutus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
201. Species Chaetoceros coronatus Gran, 1897 (uncertain > unassessed)
202. Species Chaetoceros costatus Pavillard, 1911 (uncertain > unassessed)
203. Species Chaetoceros crenatum (Ehrenberg) Brightwell accepted as Goniothecium crenatum Ehrenberg, 1854 (uncertain > unassessed)
204. Species Chaetoceros crinitum Schütt, 1895 (uncertain > unassessed)
205. Species Chaetoceros crinitus Gran, 1897 (uncertain > unassessed)
206. Species Chaetoceros criophilum (uncertain > unassessed)
207. Species Chaetoceros criophilus sensu Hust. In A. Schmidt, 1921, non Castr., 1886 (uncertain > unassessed)
208. Species Chaetoceros criophilus Gran, 1904 (uncertain > unassessed)
209. Species Chaetoceros criophilus auct. nonnull. (non Castracane) (uncertain > unassessed)
210. Species Chaetoceros criophilus E. Jorgensen, 1900 (uncertain > unassessed)
211. Species Chaetoceros criophilus Cleve, 1897 (uncertain > unassessed)
212. Species Chaetoceros cruciatum Karsten, 1905 (uncertain > unassessed)
213. Species Chaetoceros crucifer Gran in Gran & Angst, 1931 (uncertain > unassessed)
214. Species Chaetoceros curiosus Makarova, 1962 (uncertain > unassessed)
215. Species Chaetoceros currens Cleve, 1897 (uncertain > unassessed)
216. Species Chaetoceros curvatum Castracane, 1886 (uncertain > unassessed)
217. Species Chaetoceros curvisetum Cleve, 1889 (uncertain > unassessed)
218. Species Chaetoceros curvisetum Cleve, 1889 (uncertain > unassessed)
219. Species Chaetoceros curvisetus Hustedt in Schmidt, 1920 (uncertain > unassessed)
220. Species Chaetoceros cylindrosporus Makarova, 1962 (uncertain > unassessed)
221. Species Chaetoceros danicus Cleve, 1889 (uncertain > unassessed)
222. Species Chaetoceros debilis Leegaard, 1920 (uncertain > unassessed)
223. Species Chaetoceros deflandrei E. Manguin, 1960 (uncertain > unassessed)
224. Species Chaetoceros delicatula Cleve, 1898 (1900) (uncertain > unassessed)
225. Species Chaetoceros delicatulus Ostenfeld, 1902 (uncertain > unassessed)
226. Species Chaetoceros dentatus Korotkevicz, 1964 (uncertain > unassessed)
227. Species Chaetoceros diadema (Ehrenberg) Gran, 1897 accepted as Syndendrium diadema Ehrenberg, 1854 † (uncertain > unassessed)
228. Species Chaetoceros dicladia Castracane, 1886 (uncertain > unassessed)
229. Species Chaetoceros didymus Okamura, 1907 (uncertain > unassessed)
230. Species Chaetoceros difficilis Cleve, 1900 (uncertain > unassessed)
231. Species Chaetoceros difficilis Karsten, 1905 (uncertain > unassessed)
232. Species Chaetoceros diploneis Ehrenberg, 1844 (1845) (uncertain > unassessed)
233. Species Chaetoceros dipyrenops A.F.Meunier, 1913 (uncertain > unassessed)
234. Species Chaetoceros dispar Castracane, 1886 (uncertain > unassessed)
235. Species Chaetoceros distans Cleve, 1873 (uncertain > unassessed)
236. Species Chaetoceros distichum Schütt, 1895 (uncertain > unassessed)
237. Species Chaetoceros distinguendus Lemmermann, 1904 (uncertain > unassessed)
238. Species Chaetoceros diversicurvatus Van Goor, 1924 (uncertain > unassessed)
239. Species Chaetoceros dubius Proschkina-Lavrenko, 1955 (uncertain > unassessed)
240. Species Chaetoceros eibenii Grunow, 1882 (uncertain > unassessed)
241. Species Chaetoceros elegans Gutwinski, 1895 (uncertain > unassessed)
242. Species Chaetoceros elmorei Boyer, 1914 (uncertain > unassessed)
243. Species Chaetoceros elongatum Honigmann, 1910 (uncertain > unassessed)
244. Species Chaetoceros equatorialis (uncertain > unassessed)
245. Species Chaetoceros exiguus Cleve, 1897 (uncertain > unassessed)
246. Species Chaetoceros exospermum Meunier, 1913 (uncertain > unassessed)
247. Species Chaetoceros externus Gran, 1897 (uncertain > unassessed)
248. Species Chaetoceros fallax Prosckina-Lavrenko, 1955 (uncertain > unassessed)
249. Species Chaetoceros femur Schütt, 1895 (uncertain > unassessed)
250. Species Chaetoceros filiferum Karsten, 1907 (uncertain > unassessed)
251. Species Chaetoceros filiforme Meunier, 1910 (uncertain > unassessed)
252. Species Chaetoceros flexuosus Mangin, 1915 (uncertain > unassessed)
253. Species Chaetoceros forcipatus L. Mangin, 1915 (uncertain > unassessed)
254. Species Chaetoceros fragilis Meunier, 1910 (uncertain > unassessed)
255. Species Chaetoceros frickei Hustedt in Schmidt, 1921 (uncertain > unassessed)
256. Species Chaetoceros furcatus (Shadbolt) Mann, 1907 accepted as Bacteriastrum furcatum Shadbolt, 1854 (uncertain > unassessed)
257. Species Chaetoceros furcatus Ehrenberg, 1872 (uncertain > unassessed)
258. Species Chaetoceros furcellatus Yendo, 1911 (uncertain > unassessed)
259. Species Chaetoceros fusus Schütt, 1895 (uncertain > unassessed)
260. Species Chaetoceros galvestonensis Collier & Murphy, 1962 (uncertain > unassessed)
261. Species Chaetoceros gaponovii Jousé, 1959 (uncertain > unassessed)
262. Species Chaetoceros gastridium (Ehrenberg) Brightwell, 1856 accepted as Goniothecium gastridium Ehrenberg, 1844 † (uncertain > unassessed)
263. Species Chaetoceros gastridium (Ehrenberg) Ehrenberg, 1845 accepted as Goniothecium gastridium Ehrenberg, 1844 † (uncertain > unassessed)
264. Species Chaetoceros gaussii Heiden, 1928 (uncertain > unassessed)
265. Species Chaetoceros glacialis Henckel, 1925 (uncertain > unassessed)
266. Species Chaetoceros glacialis Meunier, 1910 (uncertain > unassessed)
267. Species Chaetoceros glandazi Mangin, 1910 (uncertain > unassessed)
268. Species Chaetoceros gobii Henckel, 1909 (uncertain > unassessed)
269. Species Chaetoceros gracilis Pantocsek, 1892 † (uncertain > unassessed)
270. Species Chaetoceros gracilis Paulsen, 1905 (uncertain > unassessed)
271. Species Chaetoceros gracilis Apstein, 1909 (uncertain > unassessed)
272. Species Chaetoceros granii Cleve, 1900 (uncertain > unassessed)
273. Species Chaetoceros grunowii F.Schütt, 1895 (uncertain > unassessed)
274. Species Chaetoceros grunowii Engler, 1883 (uncertain > unassessed)
275. Species Chaetoceros halo (Brun in Brun & Tempère) De Toni, 1894 accepted as Bacteriastrum halo Brun in Brun & Tempère, 1889 (uncertain > unassessed)
276. Species Chaetoceros hamatus Hustedt ex Simonsen, 1987 (uncertain > unassessed)
277. Species Chaetoceros hamatus A. P. Jousé (uncertain > unassessed)
278. Species Chaetoceros hebes Mann, 1925 (uncertain > unassessed)
279. Species Chaetoceros heimii E. Manguin, 1961 (uncertain > unassessed)
280. Species Chaetoceros hendeyi Manguin, 1960 (uncertain > unassessed)
281. Species Chaetoceros heterovalvatus Proschkina-Lavrenko, 1953 (uncertain > unassessed)
282. Species Chaetoceros hiemalis (Cleve) Cleve, 1900 accepted as Chaetoceros didymus var. hiemalis Cleve, 1897 (uncertain > unassessed)
283. Species Chaetoceros hirundinellus Qian, 1979 (uncertain > unassessed)
284. Species Chaetoceros hispidum (uncertain > unassessed)
285. Species Chaetoceros hohnii Graebner & Wujek in Wujek & Graebner, 1980 (uncertain > unassessed)
286. Species Chaetoceros holsaticum Schütt, 1895 (uncertain > unassessed)
287. Species Chaetoceros horridus Krasske, 1941 (uncertain > unassessed)
288. Species Chaetoceros hungaricus Pantocsek, 1892 (uncertain > unassessed)
289. Species Chaetoceros ikari Skvortzow, 1931 (uncertain > unassessed)
290. Species Chaetoceros imbricatus L. Mangin, 1913 (uncertain > unassessed)
291. Species Chaetoceros implicans Ehrenberg, 1872 (uncertain > unassessed)
292. Species Chaetoceros incertus Makarova, 1962 (uncertain > unassessed)
293. Species Chaetoceros incisor Ralfs in Lauder, 1864 (uncertain > unassessed)
294. Species Chaetoceros incurvum (uncertain > unassessed)
295. Species Chaetoceros incurvus Brightwell, 1856 (uncertain > unassessed)
296. Species Chaetoceros indeterminabilis Jurilj, 1957 (uncertain > unassessed)
297. Species Chaetoceros indicus Karsten, 1907 (uncertain > unassessed)
298. Species Chaetoceros indicus Subrahmanyan, 1946 (uncertain > unassessed)
299. Species Chaetoceros ingolfianus Ostenfeld, 1902 (uncertain > unassessed)
300. Species Chaetoceros insignis Proschkina-Lavrenko, 1955 (uncertain > unassessed)
301. Species Chaetoceros insignis Müller-Melchers, 1953 (uncertain > unassessed)
302. Species Chaetoceros intermedius Henckel, 1909 (uncertain > unassessed)
303. Species Chaetoceros invisibilis R.M. Gogorev & I.V. Makarova in Gogorev, 2003 (uncertain > unassessed)
304. Species Chaetoceros janischianum Castracane, 1886 (uncertain > unassessed)
305. Species Chaetoceros japonicus Ehrenberg, 1872 (uncertain > unassessed)
306. Species Chaetoceros javanicus Cleve, 1873 (uncertain > unassessed)
307. Species Chaetoceros jouseana R.M. Gogorev, 2006 (uncertain > unassessed)
308. Species Chaetoceros juetlandicus Fenner, 1994 (uncertain > unassessed)
309. Species Chaetoceros karianus Grunow, 1880 (uncertain > unassessed)
310. Species Chaetoceros karyanum Henckel, 1926 (uncertain > unassessed)
311. Species Chaetoceros kelleri Brun, 1895 (uncertain > unassessed)
312. Species Chaetoceros knipowitschi Henckel, 1909 (uncertain > unassessed)
313. Species Chaetoceros komarovii Woronichin, 1953 (uncertain > unassessed)
314. Species Chaetoceros laciniosum Schütt, 1895 (uncertain > unassessed)
315. Species Chaetoceros laciniosum Ostenfeld, 1898 (uncertain > unassessed)
316. Species Chaetoceros laeve G.Leuduger-Fortmorel, 1892 (uncertain > unassessed)
317. Species Chaetoceros lauderi Ralfs, 1864 (uncertain > unassessed)
318. Species Chaetoceros lawii E. Manguin, 1954 (uncertain > unassessed)
319. Species Chaetoceros leudugeri Brun, 1894 (uncertain > unassessed)
320. Species Chaetoceros levis Schutt, 1896 (uncertain > unassessed)
321. Species Chaetoceros limaniensis Ehrlich, 1969 (uncertain > unassessed)
322. Species Chaetoceros litoralis Lemmermann, 1909 (uncertain > unassessed)
323. Species Chaetoceros longicornis Makarova, 1962 (uncertain > unassessed)
324. Species Chaetoceros longicrure (Cleve) Ostenfeld, 1901 accepted as Chaetoceros didymus var. longicruris Cleve, 1897 (uncertain > unassessed)
325. Species Chaetoceros longiruris Ostenfeld (uncertain > unassessed)
326. Species Chaetoceros longisetus Cleve, 1900 (uncertain > unassessed)
327. Species Chaetoceros longissimum Cleve in Meunier, 1910 (uncertain > unassessed)
328. Species Chaetoceros lorenzianum (uncertain > unassessed)
329. Species Chaetoceros lorenzianus Van Breemen, 1905 (uncertain > unassessed)
330. Species Chaetoceros lorenzii Grunow in Van Heurck, 1883 (uncertain > unassessed)
331. Species Chaetoceros lyra Mereschkowsky, 1900-1902 (uncertain > unassessed)
332. Species Chaetoceros makarovae R.M. Gogorev, 2006 (uncertain > unassessed)
333. Species Chaetoceros malayensis Nielsen, 1931 (uncertain > unassessed)
334. Species Chaetoceros malygini Henckel, 1926 (uncertain > unassessed)
335. Species Chaetoceros mamillana (L.W. Bailey) Mann, 1907 accepted as Chaetoceros mamillanus Cleve, 1889 (uncertain > unassessed)
336. Species Chaetoceros mamillanus Cleve, 1889 (uncertain > unassessed)
337. Species Chaetoceros mamillosa (Grunow in Cleve & Grunow) F.W. Mills, 1933 accepted as Chaetoceros furcillatus var. mamillosa Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
338. Species Chaetoceros manguinii Reyssac, 1968 (uncertain > unassessed)
339. Species Chaetoceros manguinii Gayral, 1954 (uncertain > unassessed)
340. Species Chaetoceros marylandicus Grunow in Cleve & Möller, 1879 (uncertain > unassessed)
341. Species Chaetoceros medium Schutt, 1895 (uncertain > unassessed)
342. Species Chaetoceros medusa Mann, 1925 (uncertain > unassessed)
343. Species Chaetoceros meridiana (Schütt) Karsten, 1928 accepted as Peragallia meridiana Schütt, 1895 (uncertain > unassessed)
344. Species Chaetoceros mertensi Honigmann, 1910 (uncertain > unassessed)
345. Species Chaetoceros messanense Castracane, 1875 (uncertain > unassessed)
346. Species Chaetoceros minimus (Levander) D.Marino, G.Giuffre, M.Montresor & A.Zingone, 1991 accepted as Rhizosolenia minima Levander, 1904 (uncertain > unassessed)
347. Species Chaetoceros minutissimus Makarova & Proschkina-Lavrenko, 1964 (uncertain > unassessed)
348. Species Chaetoceros miocenicus Jousé, 1959 (uncertain > unassessed)
349. Species Chaetoceros mirabile (Grunow in Van Heurck) Mann, 1907 (uncertain > unassessed)
350. Species Chaetoceros mirabilis Makarova, 1959 (uncertain > unassessed)
351. Species Chaetoceros misumense Gran & Yendo, 1914 (uncertain > unassessed)
352. Species Chaetoceros mitra (Bailey) Cleve, 1896 accepted as Dicladia mitra J.W.Bailey, 1856 † (uncertain > unassessed)
353. Species Chaetoceros monicae Grunow in Van Heruck, 1883 (uncertain > unassessed)
354. Species Chaetoceros myriapodus L. Mangin, 1913 (uncertain > unassessed)
355. Species Chaetoceros najadianus B.Schussnig, 1915 (uncertain > unassessed)
356. Species Chaetoceros nanodenticulatus Okamura, 1907 (uncertain > unassessed)
357. Species Chaetoceros nanseni Henckel, 1925 (uncertain > unassessed)
358. Species Chaetoceros natatum E. Manguin, 1957 (uncertain > unassessed)
359. Species Chaetoceros natatum E. Manguin, 1960 (uncertain > unassessed)
360. Species Chaetoceros navicula (Ehrenberg) Brightwell, 1856 accepted as Goniothecium navicula Ehrenberg, 1844 (uncertain > unassessed)
361. Species Chaetoceros neapolitanus Schröder, 1900 (uncertain > unassessed)
362. Species Chaetoceros neglectus Karsten, 1905 (uncertain > unassessed)
363. Species Chaetoceros neobulbosum Desikachary, Gowthaman & Latha, 1987 (uncertain > unassessed)
364. Species Chaetoceros neocompactum VanLandingham, 1968 (uncertain > unassessed)
365. Species Chaetoceros neupokojewi Henckel, 1925 (uncertain > unassessed)
366. Species Chaetoceros nipponica Ikari, 1928 (uncertain > unassessed)
367. Species Chaetoceros nodulosus (Shadbolt) De Toni, 1894 accepted as Bacteriastrum nodulosa Shadbolt, 1854 (uncertain > unassessed)
368. Species Chaetoceros notabile Lohmann, 1919 (uncertain > unassessed)
369. Species Chaetoceros octagonus Hernandez-Becerril, 1992 (uncertain > unassessed)
370. Species Chaetoceros odessanus Aksentjev, 1930 (uncertain > unassessed)
371. Species Chaetoceros odontella (Ehrenberg) G.L.Rabenhorst accepted as Goniothecium odontella f. odontella Ehrenberg, 1844 (uncertain > unassessed)
372. Species Chaetoceros okamurai (uncertain > unassessed)
373. Species Chaetoceros oppositisetaceus Proschkina-Lavrenko, 1961 (uncertain > unassessed)
374. Species Chaetoceros orientalis Schiller in Hustedt, 1930 (uncertain > unassessed)
375. Species Chaetoceros ostenfeldii Cleve, 1900 (uncertain > unassessed)
376. Species Chaetoceros pachtussowi Henckel, 1925 (uncertain > unassessed)
377. Species Chaetoceros pachyceros R.Margalef (uncertain > unassessed)
378. Species Chaetoceros pacificum Ikari, 1928 (uncertain > unassessed)
379. Species Chaetoceros pacificus Semina, 1961 (uncertain > unassessed)
380. Species Chaetoceros panduriformis Bailey (uncertain > unassessed)
381. Species Chaetoceros pantocseki Hajós, 1977 (uncertain > unassessed)
382. Species Chaetoceros paradoxum Peragallo & Peragallo, 1897-1908 (uncertain > unassessed)
383. Species Chaetoceros paradoxus Schutt, 1895 (uncertain > unassessed)
384. Species Chaetoceros parallelis Boden, 1950 (uncertain > unassessed)
385. Species Chaetoceros parvus Schutt, 1895 (uncertain > unassessed)
386. Species Chaetoceros paulsenii Ostenfeld, 1902 (uncertain > unassessed)
387. Species Chaetoceros pavillardii Ikari, 1928 (uncertain > unassessed)
388. Species Chaetoceros pelagicum Cleve, 1873 (uncertain > unassessed)
389. Species Chaetoceros pendulum Karsten, 1905 (uncertain > unassessed)
390. Species Chaetoceros pennatus (Grunow in Van Heurck) De Toni, 1894 (uncertain > unassessed)
391. Species Chaetoceros perpusillus Cleve, 1897 (uncertain > unassessed)
392. Species Chaetoceros peruvianus Gran, 1908 (uncertain > unassessed)
393. Species Chaetoceros peruvianus Vanhoffen, 1897 (uncertain > unassessed)
394. Species Chaetoceros peruvio-atlanticus Karsten, 1907 (uncertain > unassessed)
395. Species Chaetoceros pethoei Pantocsek, 1892 (uncertain > unassessed)
396. Species Chaetoceros phuketensis J.E.B.Rines, P.Boonruang & E.C.Theriot, 2000 (uncertain > unassessed)
397. Species Chaetoceros pinguichaete A. & P. Henckel, 1925 (uncertain > unassessed)
398. Species Chaetoceros pinguis Henckel, 1909 (uncertain > unassessed)
399. Species Chaetoceros plicatorugosum Brun, 1894 (uncertain > unassessed)
400. Species Chaetoceros pliocenum Brun, 1891 (uncertain > unassessed)
401. Species Chaetoceros polyamobicum Henckel, 1926 (uncertain > unassessed)
402. Species Chaetoceros ponticus Mereschkowsky, 1902 (uncertain > unassessed)
403. Species Chaetoceros primordialis (uncertain > unassessed)
404. Species Chaetoceros princeps (Castracane) Mann, 1926 accepted as Bacteriastrum varians var. princeps Castracane, 1886 (uncertain > unassessed)
405. Species Chaetoceros procerum Schütt, 1895 (uncertain > unassessed)
406. Species Chaetoceros processus Makarova, 1962 (uncertain > unassessed)
407. Species Chaetoceros productus (H.L. Smith) De Toni, 1894 accepted as Bacteriastrum productum H.L. Smith, 1874 (uncertain > unassessed)
408. Species Chaetoceros protuberans Lauder, 1864 (uncertain > unassessed)
409. Species Chaetoceros protuberans Schutt in Apstein, 1901 (uncertain > unassessed)
410. Species Chaetoceros pseudoaurivillii Ikari, 1926 (uncertain > unassessed)
411. Species Chaetoceros pseudobrevis Pavillard, 1911 (uncertain > unassessed)
412. Species Chaetoceros pseudocrinitum Ostenfeld, 1901 (uncertain > unassessed)
413. Species Chaetoceros pseudocurvisetus Mangin, 1910 (uncertain > unassessed)
414. Species Chaetoceros pseudodichaeta J.Ikari, 1926 (uncertain > unassessed)
415. Species Chaetoceros pseudosimile Cleve-Euler, 1937 (uncertain > unassessed)
416. Species Chaetoceros pseudosymmetricus Nielsen, 1931 (uncertain > unassessed)
417. Species Chaetoceros pyxillae Jurilj, 1957 (uncertain > unassessed)
418. Species Chaetoceros quillensis L.W. Bailey, 1922 (uncertain > unassessed)
419. Species Chaetoceros radians F.Schütt, 1895 (uncertain > unassessed)
420. Species Chaetoceros radicans F.Schütt, 1895 (uncertain > unassessed)
421. Species Chaetoceros radiculum Castracane, 1886 (uncertain > unassessed)
422. Species Chaetoceros ralfsii Cleve, 1873 (uncertain > unassessed)
423. Species Chaetoceros ralfsii Schütt, 1896 (uncertain > unassessed)
424. Species Chaetoceros ralfsii Van Heurck, 1883 (uncertain > unassessed)
425. Species Chaetoceros ramosus Korotkevicz, 1964 (uncertain > unassessed)
426. Species Chaetoceros rectus Hernandez-Becerril, 1992 (uncertain > unassessed)
427. Species Chaetoceros recurvatus Henckel, 1909 (uncertain > unassessed)
428. Species Chaetoceros reichelti Hustedt in Schimdt et al., 1921 (uncertain > unassessed)
429. Species Chaetoceros remotus Cleve & Grunow, 1880 (uncertain > unassessed)
430. Species Chaetoceros rigidus Ostenfeld, 1902 (uncertain > unassessed)
431. Species Chaetoceros robustum (Cleve) Ostenfeld in Ostenfeld & Schmidt, 1901 accepted as Chaetoceros peruvianum var. robustum Cleve, 1873 (uncertain > unassessed)
432. Species Chaetoceros robustus Makarova, 1961 (uncertain > unassessed)
433. Species Chaetoceros rogersii (Ehrenberg) Rabenhorst, 1864 accepted as Goniothecium rogersii Ehrenberg, 1843 † (uncertain > unassessed)
434. Species Chaetoceros rostratus Ralfs, 1864 (uncertain > unassessed)
435. Species Chaetoceros rude Leuduger-Fortmorel, 1892 (uncertain > unassessed)
436. Species Chaetoceros rudis (Cleve) Cleve, 1901 accepted as Chaetoceros borealis var. rudis Cleve, 1897 (uncertain > unassessed)
437. Species Chaetoceros russanowii Henckel, 1925 (uncertain > unassessed)
438. Species Chaetoceros salsugineus Takano, 1983 (uncertain > unassessed)
439. Species Chaetoceros saltans Cleve, 1897 (uncertain > unassessed)
440. Species Chaetoceros sarmaticus (uncertain > unassessed)
441. Species Chaetoceros scabrosus Proschkina-Lavrenko, 1955 (uncertain > unassessed)
442. Species Chaetoceros sceleton Hensen, 1911 (uncertain > unassessed)
443. Species Chaetoceros schimperianus G.Karsten, 1905 (uncertain > unassessed)
444. Species Chaetoceros schmidtii C.E.H.Ostenfeld (uncertain > unassessed)
445. Species Chaetoceros scolopendra Cleve, 1896 (uncertain > unassessed)
446. Species Chaetoceros scriptus Frenguelli, 1949 (uncertain > unassessed)
447. Species Chaetoceros secundus Schutt, 1893 (uncertain > unassessed)
448. Species Chaetoceros sedowii Henckel, 1925 (uncertain > unassessed)
449. Species Chaetoceros seiracanthus Gran, 1897 (uncertain > unassessed)
450. Species Chaetoceros septentrionale Østrup, 1895 (uncertain > unassessed)
451. Species Chaetoceros septentrionalis Cleve, 1896 (uncertain > unassessed)
452. Species Chaetoceros seriacanthus Gran (uncertain > unassessed)
453. Species Chaetoceros sessilis Grøntved, 1951 (uncertain > unassessed)
454. Species Chaetoceros setoensis Ikari, 1926 (uncertain > unassessed)
455. Species Chaetoceros seychellarum Karsten, 1907 (uncertain > unassessed)
456. Species Chaetoceros siamense Ostenfeld, 1902 (uncertain > unassessed)
457. Species Chaetoceros sigmocalamus Tempère & Brun in Brun & Tempère, 1889 (uncertain > unassessed)
458. Species Chaetoceros similoides Hustedt, 1956 (uncertain > unassessed)
459. Species Chaetoceros skeleton F.Schütt, 1895 (uncertain > unassessed)
460. Species Chaetoceros skeleton Van Heurck, 1909 (uncertain > unassessed)
461. Species Chaetoceros solitarius (Cleve) Cleve, 1897 accepted as Chaetoceros borealis f. solitaria Cleve, 1897 (uncertain > unassessed)
462. Species Chaetoceros spinosus Leuduger-Fortmorel, 1898 (uncertain > unassessed)
463. Species Chaetoceros spirillum (Castracane) De Toni, 1894 accepted as Bacteriastrum spirillum Castracane, 1886 (uncertain > unassessed)
464. Species Chaetoceros ssedowi Henckel, 1925 (uncertain > unassessed)
465. Species Chaetoceros strictus Karsten, 1905 (uncertain > unassessed)
466. Species Chaetoceros subcompressus Schroder, 1900 (uncertain > unassessed)
467. Species Chaetoceros subconicus Semina in Semina & Sergeeva, 1982 (uncertain > unassessed)
468. Species Chaetoceros subjunctum J.W. Bailey in Bailey Collection (uncertain > unassessed)
469. Species Chaetoceros subsalsus Lemmermann, 1904 (uncertain > unassessed)
470. Species Chaetoceros subsalsus Hustedt in Schmidt, 1920 (uncertain > unassessed)
471. Species Chaetoceros subsecundus (Grunow ex Van Heurck) Hustedt, 1927 accepted as Chaetoceros distans var. subsecunda Grunow in Van Heurck, 1883 (uncertain > unassessed)
472. Species Chaetoceros subtortilis Proschkina-Lavrenko, 1961 (uncertain > unassessed)
473. Species Chaetoceros sumatranus Karsten, 1907 (uncertain > unassessed)
474. Species Chaetoceros surirella Frenguelli, 1949 (uncertain > unassessed)
475. Species Chaetoceros symmetricus (Leuduger-Fortmorel) De Toni, 1894 accepted as Bacteriastrum symmetricum Leuduger-Fortmorel, 1892 (uncertain > unassessed)
476. Species Chaetoceros tenellus Ehrenberg, 1872 (uncertain > unassessed)
477. Species Chaetoceros tenuissumus Meunier, 1913 (uncertain > unassessed)
478. Species Chaetoceros tetrachaeta Ehrenberg, 1840 (uncertain > unassessed)
479. Species Chaetoceros tetras Karsten, 1905 (uncertain > unassessed)
480. Species Chaetoceros tetrastichon Cleve, 1897 (uncertain > unassessed)
481. Species Chaetoceros tetrastichus Kisselev, 1959 (uncertain > unassessed)
482. Species Chaetoceros thienemanni Hustedt, 1925 (uncertain > unassessed)
483. Species Chaetoceros throndsenii (Marino, Montresor & Zingone) Marino, Montresor & Zingone, 1991 accepted as Miraltia throndsenii Marino, Montresor & Zingone, 1987 (uncertain > unassessed)
484. Species Chaetoceros tiltilensis Frenguelli, 1949 (uncertain > unassessed)
485. Species Chaetoceros tortilisetus L. Mangin, 1910 (uncertain > unassessed)
486. Species Chaetoceros tortissimus Gran, 1900 (uncertain > unassessed)
487. Species Chaetoceros transisetus Johansen & Boyer, 1995 (uncertain > unassessed)
488. Species Chaetoceros tuberculosus Gutwinski, 1895 (uncertain > unassessed)
489. Species Chaetoceros turbineus Makarova & Proschkina-Lavrenko, 1964 (uncertain > unassessed)
490. Species Chaetoceros uruguayensis Muller-Melchers, 1953 (uncertain > unassessed)
491. Species Chaetoceros valdivae (Karsten) Mills, 1933 accepted as Corethron valdiviae Karsten, 1904 (uncertain > unassessed)
492. Species Chaetoceros validum Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
493. Species Chaetoceros vanheurckii Gran, 1897 (uncertain > unassessed)
494. Species Chaetoceros vanheurckii Karsten, 1907 (uncertain > unassessed)
495. Species Chaetoceros varians Van Heurck, 1885 (uncertain > unassessed)
496. Species Chaetoceros vistulae Apstein, 1909 (uncertain > unassessed)
497. Species Chaetoceros vixvisibilis Schiller in Hustedt, 1930 (uncertain > unassessed)
498. Species Chaetoceros volans Schütt, 1895 (uncertain > unassessed)
499. Species Chaetoceros weissflogii F.Schütt, 1905 (uncertain > unassessed)
500. Species Chaetoceros weissflogii Cleve, 1901 (uncertain > unassessed)
501. Species Chaetoceros wighami (uncertain > unassessed)
502. Species Chaetoceros wighamii Cleve & Grunow, 1880 (uncertain > unassessed)
503. Species Chaetoceros wighamii Grunow in Van Heurck, 1882 (uncertain > unassessed)
504. Species Chaetoceros wighamoides Cholnoky, 1966 (uncertain > unassessed)
505. Species Chaetoceros willei Gran, 1897 (uncertain > unassessed)
506. Species Chaetoceros xishaensis Guo, Ye & Zhou, 1978 (uncertain > unassessed)
507. Species Chaetoceros ziwolki Henckel, 1925 (uncertain > unassessed)

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