1. Species Cocconeis acuta Ehrenberg, 1854 (uncertain > unassessed)
2. Species Cocconeis acutata Rabenhorst, 1864 (uncertain > unassessed)
3. Species Cocconeis adeliae E. Manguin, 1960 (uncertain > unassessed)
4. Species Cocconeis adjuncta Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
5. Species Cocconeis adriatica Kützing, 1844 (uncertain > unassessed)
6. Species Cocconeis aemula Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
7. Species Cocconeis aggregata Kützing, 1844 (uncertain > unassessed)
8. Species Cocconeis ahlefeldii Janisch in Schmidt et al., 1894 (uncertain > unassessed)
9. Species Cocconeis algida Cleve-Euler, 1953
10. Species Cocconeis aliena Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
11. Species Cocconeis allmanniana (Gregory) Grunow, 1867 accepted as Pinnularia allmaniana Gregory, 1857 (uncertain > unassessed)
12. Species Cocconeis alucitae Riaux-Gobin & Compère, 2008 (uncertain > unassessed)
13. Species Cocconeis ambigua (uncertain > unassessed)
14. Species Cocconeis americana Ehrenberg, 1841 (1843) (uncertain > unassessed)
15. Species Cocconeis amerieuglypta L.F.Costa, C.E.Wetzel & Ector
16. Species Cocconeis amphiceros Ehrenberg, 1840 (uncertain > unassessed)
17. Species Cocconeis amydrofilum Riznyk, 1973 (uncertain > unassessed)
18. Species Cocconeis amygdalina Grunow, 1880 (uncertain > unassessed)
19. Species Cocconeis andersonii Reimer & Lee, 1988 (uncertain > unassessed)
20. Species Cocconeis andesitica Pantocsek, 1889 (uncertain > unassessed)
21. Species Cocconeis angermannica Cleve-Euler, 1953 (uncertain > unassessed)
22. Species Cocconeis angusta Ehrenberg, 1854 (uncertain > unassessed)
23. Species Cocconeis ankobraensis Foged, 1966 (uncertain > unassessed)
24. Species Cocconeis antarctica N.E. Brown, 1920 (uncertain > unassessed)
25. Species Cocconeis antarctica (Van Heurck) J.Frenguelli & H.A. Orlando, 1958 accepted as Cocconeis japonica var. antarctica H.F.Van Heurck, 1909 (uncertain > unassessed)
26. Species Cocconeis apiculata Karsten, 1899 (uncertain > unassessed)
27. Species Cocconeis apiculata (Greville) A.W.F.Schmidt, 1895 accepted as Stauroneis apiculata Greville, 1859 accepted as Achnanthes apiculata (Greville, 1859) (uncertain > unassessed)
28. Species Cocconeis archeri O' Meara, 1874 (uncertain > unassessed)
29. Species Cocconeis archibaldii Schoeman in Schoeman & Meaton, 1982 (uncertain > unassessed)
30. Species Cocconeis arcta Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
31. Species Cocconeis arctica Cleve, 1873 (uncertain > unassessed)
32. Species Cocconeis arenicola Riznyk, 1973 (uncertain > unassessed)
33. Species Cocconeis arenicola Riznyk emend. Al-Handal & Riaux-Gob. in Al-Handal et al., 2019
34. Species Cocconeis argus J.W. Bailey in Bailey Collection (uncertain > unassessed)
35. Species Cocconeis armata Greville, 1866 (uncertain > unassessed)
36. Species Cocconeis arraniensis Greville, 1859 (uncertain > unassessed)
37. Species Cocconeis atmosphaerica Ehrenberg, 1854 (uncertain > unassessed)
38. Species Cocconeis atomus (Kützing) G.L.Rabenhorst, 1863 (uncertain > unassessed)
39. Species Cocconeis australis Petit, 1877 (uncertain > unassessed)
40. Species Cocconeis baikalensis (Skvortzow & Meyer) Skvortzow, 1946 accepted as Cocconeis placentula var. baicalensis Skvortzov & Meyer, 1928 (uncertain > unassessed)
41. Species Cocconeis balatonis Pantocsek, 1902 (uncertain > unassessed)
42. Species Cocconeis baldjikiana (Grunow) Grunow in Schmidt et al., 1894 accepted as Cocconeis scutellum var. baldjikiana (Grunow) Cleve (uncertain > unassessed)
43. Species Cocconeis baltica Schumann, 1867 (uncertain > unassessed)
44. Species Cocconeis barbadensis Greville, 1864 (uncertain > unassessed)
45. Species Cocconeis bardawilensis Ehrlich, 1975 (uncertain > unassessed)
46. Species Cocconeis barleyi T.A.Frankovich & M.De Stefano, 2005
47. Species Cocconeis belawani (Meister) Kolbe, 1957 accepted as Disconeis belawani Meister, 1932 (uncertain > unassessed)
48. Species Cocconeis beltmeyeri Janisch in Schmidt et al., 1894 (uncertain > unassessed)
49. Species Cocconeis benrathi Steinecke, 1915 (uncertain > unassessed)
50. Species Cocconeis bifida Eichwald, 1847 (uncertain > unassessed)
51. Species Cocconeis biflexa A.Schmidt, 1874 (uncertain > unassessed)
52. Species Cocconeis biharensis Pantocsek (uncertain > unassessed)
53. Species Cocconeis bilicis Meister, 1937 (uncertain > unassessed)
54. Species Cocconeis binotata Grunow, 1863 accepted as Mastogloia binotata (Grunow) Cleve, 1895 (synonym)
55. Species Cocconeis biradiata Brun in Schmidt et al., 1894 (uncertain > unassessed)
56. Species Cocconeis blandicula Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
57. Species Cocconeis bonnieri Héribaud, 1903 (uncertain > unassessed)
58. Species Cocconeis borbonica Riaux-Gobin & Compère, 2008 (uncertain > unassessed)
59. Species Cocconeis borealis Ehrenberg, 1841 (1843) (uncertain > unassessed)
60. Species Cocconeis boryana Pantocsek, 1892 (uncertain > unassessed)
61. Species Cocconeis bramaputrae Ehrenberg, 1854 (uncertain > unassessed)
62. Species Cocconeis brasiliensis Ehrenberg in Ralfs in Pritchard, 1861 (uncertain > unassessed)
63. Species Cocconeis brevicostata Hustedt (uncertain > unassessed)
64. Species Cocconeis brevicostata Hustedt (uncertain > unassessed)
65. Species Cocconeis britannica Naegeli ex Kützing, 1849
66. Species Cocconeis brundusiaca Rabenhorst, 1853 (uncertain > unassessed)
67. Species Cocconeis calcar (Cleve) Cleve-Euler, 1953 accepted as Achnanthes calcar f. calcar Cleve, 1891 (uncertain > unassessed)
68. Species Cocconeis calderoni Azpeitia, 1911 (uncertain > unassessed)
69. Species Cocconeis california (uncertain > unassessed)
70. Species Cocconeis californica Grunow, 1880 (uncertain > unassessed)
71. Species Cocconeis callosa Meister, 1937 (uncertain > unassessed)
72. Species Cocconeis campechiana Grunow in Schmidt et al., 1894 (uncertain > unassessed)
73. Species Cocconeis campechiana Cleve in Schmidt et al., 1894 (uncertain > unassessed)
74. Species Cocconeis canaliculata Jurilj, 1957 (uncertain > unassessed)
75. Species Cocconeis capensis (Cholnoky) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Cocconeis clandestina var. capensis Cholnoky, 1963 (uncertain > unassessed)
76. Species Cocconeis capitata Rabenhorst, 1855 (uncertain > unassessed)
77. Species Cocconeis caribensis O. E. Romero & J. N. Navarro, 1999 (uncertain > unassessed)
78. Species Cocconeis carinata Riaux-Gobin, Ector & Witkowski
79. Species Cocconeis carminata Cholnoky, 1968 (uncertain > unassessed)
80. Species Cocconeis cascadensis Stancheva, 2019
81. Species Cocconeis cataractarum Hustedt in Schmidt, 1936 accepted as Psammothidium cataractarum (Hustedt) Kulikovskiy, Glushchenko & Kociolek, 2020 (uncertain > unassessed)
82. Species Cocconeis cataractarum Hustedt, 1937 accepted as Psammothidium cataractarum (Hustedt) Kulikovskiy, Glushchenko & Kociolek, 2020
83. Species Cocconeis caulerpacola Witkowski, Car & Dobosz, 2012
84. Species Cocconeis ceticola E.W.Nelson accepted as Bennettella ceticola (E.W.Nelson) R.W.Holmes, 1985 (synonym)
85. Species Cocconeis charcotii M. Peragallo, 1921 (uncertain > unassessed)
86. Species Cocconeis cholnokyana Cleve-Euler, 1934 (uncertain > unassessed)
87. Species Cocconeis churalis H. Suzuki, 2012
88. Species Cocconeis cincta Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
89. Species Cocconeis cingulata Hustedt, 1942 (uncertain > unassessed)
90. Species Cocconeis circulifera Mann, 1925 (uncertain > unassessed)
91. Species Cocconeis circumcincta Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
92. Species Cocconeis citrina Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
93. Species Cocconeis citrina Zanon, 1938 (uncertain > unassessed)
94. Species Cocconeis citronella Mann, 1925 (uncertain > unassessed)
95. Species Cocconeis citrus E. Manguin, 1949 (uncertain > unassessed)
96. Species Cocconeis clandestina A.Schmidt, 1894
97. Species Cocconeis clavigera O'Meara, 1867 (uncertain > unassessed)
98. Species Cocconeis clypeus Ehrenberg, 1838 (uncertain > unassessed)
99. Species Cocconeis coarctata Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
100. Species Cocconeis coelata Arnott ex Greville, 1862 (uncertain > unassessed)
101. Species Cocconeis coelatus Walker-Arnott ms. ex Greville, 1862 (uncertain > unassessed)
102. Species Cocconeis comis Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
103. Species Cocconeis communis Heiberg, 1863 (uncertain > unassessed)
104. Species Cocconeis communis Reinhardt, 1883 (uncertain > unassessed)
105. Species Cocconeis composita A.W.F.Schmidt (uncertain > unassessed)
106. Species Cocconeis concentrica Ehrenberg, 1841 (1843) (uncertain > unassessed)
107. Species Cocconeis confusa J.R.Carter, 1981 (uncertain > unassessed)
108. Species Cocconeis consociata Kützing, 1844 (uncertain > unassessed)
109. Species Cocconeis conspicua Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
110. Species Cocconeis contermina A.W.F.Schmidt, 1894 (uncertain > unassessed)
111. Species Cocconeis contrerasi Hanna & Grant, 1926 (uncertain > unassessed)
112. Species Cocconeis convexa M.H.Giffen, 1967 (uncertain > unassessed)
113. Species Cocconeis coralliensis Riaux-Gobin & Compère, 2008 (uncertain > unassessed)
114. Species Cocconeis coreana R. Jahn & B. M. Suh in Jahn et al., 2020
115. Species Cocconeis cornuta Janisch in Schmidt et al., 1895 (uncertain > unassessed)
116. Species Cocconeis coronata T.Brightwell, 1859 (uncertain > unassessed)
117. Species Cocconeis coronata Riaux-Gobin & Romero, 2010 accepted as Cocconeis coronatoides Riaux-Gobin & Romero, 2011 (synonym)
118. Species Cocconeis coronatoides Riaux-Gobin & Romero, 2011
119. Species Cocconeis costata Gregory, 1855
120. Species Cocconeis costata Janisch, 1862 (uncertain > unassessed)
121. Species Cocconeis crebrestriata Greville, 1857 (uncertain > unassessed)
122. Species Cocconeis cribrosa Cleve (uncertain > unassessed)
123. Species Cocconeis crispa Edsbagge, 1968 (uncertain > unassessed)
124. Species Cocconeis crozetensis Romero & Van de Vijver
125. Species Cocconeis cruciata Pantocsek, 1886 (uncertain > unassessed)
126. Species Cocconeis crux Ehrenberg, 1844 (1845) (uncertain > unassessed)
127. Species Cocconeis crux Petit, 1877 (uncertain > unassessed)
128. Species Cocconeis cunoniae Cholnoky, 1963 (uncertain > unassessed)
129. Species Cocconeis curiosa Hustedt, 1958 (uncertain > unassessed)
130. Species Cocconeis curvirotunda Forti, 1910 (uncertain > unassessed)
131. Species Cocconeis cyclophora Grunow in Van Heurck, 1880 (uncertain > unassessed)
132. Species Cocconeis cymatoda Schrader, 1969 (uncertain > unassessed)
133. Species Cocconeis czarneckii Stancheva, L.D. Mora & R. Jahn in Mora et al., 2022
134. Species Cocconeis dallmannii Al-Handal, Riaux-Gobin, Romero & Wulff, 2008 (uncertain > unassessed)
135. Species Cocconeis danica Flogel, 1873 (uncertain > unassessed)
136. Species Cocconeis debenedettii Frenguelli & Orlando, 1958 (unaccepted > nomen nudum, invalidly published)
137. Species Cocconeis debesi Hustedt, 1933 (uncertain > unassessed)
138. Species Cocconeis debesii
139. Species Cocconeis decipiens Cleve, 1873 (uncertain > unassessed)
140. Species Cocconeis decussata Ehrenberg, 1841 (1843) (uncertain > unassessed)
141. Species Cocconeis dehiscens Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
142. Species Cocconeis delalineata M.H.Hohn, 1961 (uncertain > unassessed)
143. Species Cocconeis delapunctata M.H.Hohn, 1961 (uncertain > unassessed)
144. Species Cocconeis delicata Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
145. Species Cocconeis denticula Leuduger-Fortmorel, 1879 (uncertain > unassessed)
146. Species Cocconeis denticulata Leuduger-Fortmorel, 1879 (uncertain > unassessed)
147. Species Cocconeis deperdita Giffen, 1975 (uncertain > unassessed)
148. Species Cocconeis depressa Kützing, 1844 (uncertain > unassessed)
149. Species Cocconeis detoniana Pantocsek, 1892 (uncertain > unassessed)
150. Species Cocconeis diaphana W.Smith, 1853 (uncertain > unassessed)
151. Species Cocconeis dilatata T.Marsson, 1900 (uncertain > unassessed)
152. Species Cocconeis diminuta Pantocsek, 1902 accepted as Cocconeis neodiminuta Krammer, 1990
153. Species Cocconeis diplous Sinjukova, 1960 (uncertain > unassessed)
154. Species Cocconeis dirupta W.Gregory, 1857
155. Species Cocconeis dirupta Ehrenberg in Schmidt et al., 1895 (uncertain > unassessed)
156. Species Cocconeis dirupta Meunier, 1910 (uncertain > unassessed)
157. Species Cocconeis diruptoides Hustedt, 1959 (uncertain > unassessed)
158. Species Cocconeis disciformis Ehrenberg, 1854 (uncertain > unassessed)
159. Species Cocconeis discrepans A.W.F.Schmidt, 1894 accepted as Amphicocconeis discrepans (A.W.F. Schmidt, 1894) Riaux-Gobin, Witkowski, Ector & Igersheim in Riaux-Gobin et al., 2018 (uncertain > unassessed)
160. Species Cocconeis disculoides Hustedt, 1955 (uncertain > unassessed)
161. Species Cocconeis disculus (Schumann) Cleve, 1882
162. Species Cocconeis dispar Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
163. Species Cocconeis distans W.Gregory, 1855 (uncertain > unassessed)
164. Species Cocconeis distans Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
165. Species Cocconeis distantula Giffen, 1967 (uncertain > unassessed)
166. Species Cocconeis diversa J.R.Carter, 1981 (uncertain > unassessed)
167. Species Cocconeis divisa Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
168. Species Cocconeis dubravicensis Pantocsek, 1892 (uncertain > unassessed)
169. Species Cocconeis duplex Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
170. Species Cocconeis egena A.Schmidt, 1894 (uncertain > unassessed)
171. Species Cocconeis egregia Moser, Steindorf & Lange-Bertalot, 1995 (uncertain > unassessed)
172. Species Cocconeis elegans Ardissone, 1864 (uncertain > unassessed)
173. Species Cocconeis elongata Ehrenberg, 1841 (uncertain > unassessed)
174. Species Cocconeis emmerici Janisch in Schmidt et al., 1895 (uncertain > unassessed)
175. Species Cocconeis engelbrechtii Cholnoky, 1955 (uncertain > unassessed)
176. Species Cocconeis entomon Cleve-Euler, 1915 (uncertain > unassessed)
177. Species Cocconeis eocaenica Schrader, 1969 (uncertain > unassessed)
178. Species Cocconeis euglypta Ehrenberg, 1854 (uncertain > unassessed)
179. Species Cocconeis euglyptoides (Geitler) H. Lange-Bertalot in Werum & Lange-Bertalot, 2004 accepted as Cocconeis placentula var. euglyptoides L.Geitler, 1958 (uncertain > unassessed)
180. Species Cocconeis evolvens Jurilj, 1957 (uncertain > unassessed)
181. Species Cocconeis exarata Grunow, 1868 (uncertain > unassessed)
182. Species Cocconeis excentrica Donkin, 1858 (uncertain > unassessed)
183. Species Cocconeis excentrica Gutwinski, 1890 (uncertain > unassessed)
184. Species Cocconeis exigua (Grunow) Schönfeldt, 1907 (uncertain > unassessed)
185. Species Cocconeis exigua Torka, 1909
186. Species Cocconeis exilis (Kützing) Schonfeldt, 1907 (uncertain > unassessed)
187. Species Cocconeis eximia Schmidt in Schmidt at al., 1894 (uncertain > unassessed)
188. Species Cocconeis exoptata Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
189. Species Cocconeis extravagans Janisch in Schmidt et al., 1894 (uncertain > unassessed)
190. Species Cocconeis fasciata Ehrenberg, 1841 (1843) (uncertain > unassessed)
191. Species Cocconeis fasciolata (Ehrenberg) N.E.Brown, 1920 accepted as Rhaphoneis fasciolata var. fasciolata Ehrenberg, 1844 (uncertain > unassessed)
192. Species Cocconeis febigeri (Christian) Brun in Schmidt et al., 1894 accepted as Raphidodiscus febigeri Christian, 1887 † (uncertain > unassessed)
193. Species Cocconeis fenestratus (Greville) Mills, 1933 accepted as Campylodiscus fenestratus Greville, 1857 (uncertain > unassessed)
194. Species Cocconeis fennica Ulskii, 1864 (uncertain > unassessed)
195. Species Cocconeis festiva Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
196. Species Cocconeis feuerborni Hustedt, 1937 (uncertain > unassessed)
197. Species Cocconeis feuerborni Hustedt in Schmidt, 1936 (uncertain > unassessed)
198. Species Cocconeis fimbriata Brightwell, 1859 (uncertain > unassessed)
199. Species Cocconeis fimbriata Ehrenberg, 1858 (uncertain > unassessed)
200. Species Cocconeis finnica Ehrenberg, 1838 (uncertain > unassessed)
201. Species Cocconeis finnmarchica Grunow, 1880 (uncertain > unassessed)
202. Species Cocconeis flexella Janisch & Rabenhorst, 1863 (uncertain > unassessed)
203. Species Cocconeis flexella (Kützing) Cleve, 1895 accepted as Eucocconeis flexella (Kützing) Meister, 1912 accepted as Cymbella flexella Kützing, 1844 (synonym)
204. Species Cocconeis fluminensis (Grunow) H.Peragallo & M.Peragallo, 1897
205. Species Cocconeis fluviatilis J.H.Wallace, 1960 (uncertain > unassessed)
206. Species Cocconeis formosa J.-J.Brun (uncertain > unassessed)
207. Species Cocconeis fraseri MacKay in L.W. Bailey & MacKay, 1915 (uncertain > unassessed)
208. Species Cocconeis fraterna Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
209. Species Cocconeis fraudulens Simonsen, 1987 (uncertain > unassessed)
210. Species Cocconeis frustrationis Riaux-Gobin et al., 2015
211. Species Cocconeis fulgur Brun, 1891 (uncertain > unassessed)
212. Species Cocconeis gaussii Heiden in Heiden & Kolbe, 1928 (uncertain > unassessed)
213. Species Cocconeis gautieri van Heurck, 1909 accepted as Cocconeis antiqua J.A.Tempère & J.-J.Brun, 1889 † (synonym)
214. Species Cocconeis gautierii H.F.Van Heurck
215. Species Cocconeis gemmata Ehrenberg, 1854 (uncertain > unassessed)
216. Species Cocconeis gemmifera Ehrenberg, 1854 (uncertain > unassessed)
217. Species Cocconeis germainii Riaux-Gobin, C.; Witkowski, A. & Romero, O.E., 2007 (uncertain > unassessed)
218. Species Cocconeis gibberula (Grunow) Hustedt
219. Species Cocconeis gibbocalyx J.-J.Brun, 1891 (uncertain > unassessed)
220. Species Cocconeis gieskesii Cholnoky, 1963 (uncertain > unassessed)
221. Species Cocconeis glacialis Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
222. Species Cocconeis glacialis Cleve, 1873 (uncertain > unassessed)
223. Species Cocconeis glans Ehrenberg, 1854 (uncertain > unassessed)
224. Species Cocconeis grantiana Greville, 1861 (uncertain > unassessed)
225. Species Cocconeis granulata Meister, 1937 (uncertain > unassessed)
226. Species Cocconeis granulata Grunow, 1877-1882 (uncertain > unassessed)
227. Species Cocconeis granulifera Greville, 1861 (uncertain > unassessed)
228. Species Cocconeis grata A.W.F.Schmidt ex Romero & Riaux-Gobin, 2014
229. Species Cocconeis grata Østrup, 1902 (uncertain > unassessed)
230. Species Cocconeis gregoryi C.Riaux-Gobin, P.Compère & L.Ector, 2014
231. Species Cocconeis grevillei W.Smith, 1853 (uncertain > unassessed)
232. Species Cocconeis groenlandica Ehrenberg, 1872 (1873) (uncertain > unassessed)
233. Species Cocconeis grossii Héribaud in Héribaud et al., 1920 (uncertain > unassessed)
234. Species Cocconeis grovei sensu Østrup, 1910 (uncertain > unassessed)
235. Species Cocconeis grovei Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
236. Species Cocconeis grunovii Schmidt in Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
237. Species Cocconeis grunowii Pantocsek, 1889 (uncertain > unassessed)
238. Species Cocconeis guttata Hustedt & Aleem, 1951 (uncertain > unassessed)
239. Species Cocconeis gymna Schrader, 1969 (uncertain > unassessed)
240. Species Cocconeis haradaae Pantocsek, 1892 (uncertain > unassessed)
241. Species Cocconeis hariotii Petit, 1888 (uncertain > unassessed)
242. Species Cocconeis hauniensis A.Witkowski, 1993 (uncertain > unassessed)
243. Species Cocconeis helvetica J.-J.Brun (uncertain > unassessed)
244. Species Cocconeis heteroidea Hantzsch
245. Species Cocconeis hexagona (J.-J.Brun & Cleve) Cleve accepted as Achnanthes hexagona Cleve & Brun in Brun, 1891 (uncertain > unassessed)
246. Species Cocconeis heydrichii H.F.Van Heurck, 1909 (uncertain > unassessed)
247. Species Cocconeis hirsuta Cholnoky, 1963 (uncertain > unassessed)
248. Species Cocconeis hoffmanni Simonsen, 1959 (uncertain > unassessed)
249. Species Cocconeis hospes Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
250. Species Cocconeis hungarica Hajós, 1959 (uncertain > unassessed)
251. Species Cocconeis hungarica (Grunow) Schönfeldt, 1907 accepted as Achnanthidium hungaricum Grunow, 1863 (uncertain > unassessed)
252. Species Cocconeis hustedtii Krasske, 1923 (uncertain > unassessed)
253. Species Cocconeis hyalina Pantocsek, 1902 (uncertain > unassessed)
254. Species Cocconeis hyperborea Ehrenberg, 1853 (uncertain > unassessed)
255. Species Cocconeis illustris Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
256. Species Cocconeis imperatrix A.W.F.Schmidt, 1894 accepted as Cocconeis fasciolata (Ehrenberg) N.E.Brown, 1920 accepted as Rhaphoneis fasciolata var. fasciolata Ehrenberg, 1844
257. Species Cocconeis inconspicua Greville, 1857 (uncertain > unassessed)
258. Species Cocconeis indica Ehrenberg, 1854 (uncertain > unassessed)
259. Species Cocconeis infirmata Manguin, 1957 (uncertain > unassessed)
260. Species Cocconeis inflexa Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
261. Species Cocconeis insignis Janisch in Schmidt et al., 1895 (uncertain > unassessed)
262. Species Cocconeis insueta Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
263. Species Cocconeis intermedia Peragallo & Héribaud in Héribaud, 1893 emend C.E.Wetzel, G.G.Lai, Ector & Jüttner in Lai et al., 2020
264. Species Cocconeis intermedia Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
265. Species Cocconeis interrupta Grunow, 1863 (uncertain > unassessed)
266. Species Cocconeis inusitatus M.H.Hohn, 1961 (uncertain > unassessed)
267. Species Cocconeis irregularis (Schulz) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Cocconeis scutellum var. irregularis Schulz, 1926 (uncertain > unassessed)
268. Species Cocconeis islandica Ehrenberg, 1843 (uncertain > unassessed)
269. Species Cocconeis jacksoni Schrader, 1969 (uncertain > unassessed)
270. Species Cocconeis janchenii Pantocsek, 1909 (uncertain > unassessed)
271. Species Cocconeis janischii Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
272. Species Cocconeis japonica Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
273. Species Cocconeis japonica (Hustedt) Cleve-Euler, 1953 accepted as Achnanthes pinnata var. japonica Hustedt, 1927 (uncertain > unassessed)
274. Species Cocconeis japonica A.Schmidt, 1874 (uncertain > unassessed)
275. Species Cocconeis jimboi Pantocsek, 1892 accepted as Surirella jimboi Pantocsek, 1892 (uncertain > unassessed)
276. Species Cocconeis jimboites VanLandingham, 1968 (uncertain > unassessed)
277. Species Cocconeis jonica Rabenhorst according to Habirshaw (uncertain > unassessed)
278. Species Cocconeis kamchatkiensis Mann, 1925 (uncertain > unassessed)
279. Species Cocconeis kerguelenensis Manguin in Bourrelly & Manguin, 1954 (uncertain > unassessed)
280. Species Cocconeis kerguelensis Petit, 1888 (uncertain > unassessed)
281. Species Cocconeis kinkeri Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
282. Species Cocconeis kinkerii Pantocsek, 1892 (uncertain > unassessed)
283. Species Cocconeis kirchenpauperiana Janisch & Rabenhorst, 1862 (uncertain > unassessed)
284. Species Cocconeis klamathensis H.E.Sovereign, 1958 (uncertain > unassessed)
285. Species Cocconeis krammeri Lange-Bertalot & Metzeltin, 1996 (uncertain > unassessed)
286. Species Cocconeis kruizingai Reinhold, 1937 (uncertain > unassessed)
287. Species Cocconeis kuetzingii Brébisson (uncertain > unassessed)
288. Species Cocconeis kurakakea Riaux-Gobin & Witkowski, 2018
289. Species Cocconeis lagerheimii Cleve, 1894 (uncertain > unassessed)
290. Species Cocconeis lamprosticta Gregory, 1857 (uncertain > unassessed)
291. Species Cocconeis lanceolata Heiden, 1900 (uncertain > unassessed)
292. Species Cocconeis lanzii Forti, 1913 (uncertain > unassessed)
293. Species Cocconeis lapponica (Hustetd) Cleve-Euler, 1934 accepted as Eucocconeis quadratarea (Østrup) Lange-Bertalot, 1999 (synonym)
294. Species Cocconeis latecostata Hustedt, 1955 (uncertain > unassessed)
295. Species Cocconeis lauriensis J.Frenguelli & H.A.Orlando, 1958 (unaccepted > nomen nudum, invalidly published)
296. Species Cocconeis leonis Carter & Denny, 1987 (uncertain > unassessed)
297. Species Cocconeis leptoceros Ehrenberg, 1841 (1843) (uncertain > unassessed)
298. Species Cocconeis leutourneuri Cleve, 1895 (uncertain > unassessed)
299. Species Cocconeis levis Østrup, 1918 (uncertain > unassessed)
300. Species Cocconeis limbata Ehrenberg, 1840 (uncertain > unassessed)
301. Species Cocconeis limbata sensu Neupauer, 1867 (uncertain > unassessed)
302. Species Cocconeis linearis (W.Smith) Schonfeldt, 1907 accepted as Achnanthidium lineare W.Smith, 1855 (uncertain > unassessed)
303. Species Cocconeis lineata Ehrenberg, 1843 (uncertain > unassessed)
304. Species Cocconeis lirata Ehrenberg, 1854 (uncertain > unassessed)
305. Species Cocconeis litigiosa van Heurck, 1909 (uncertain > unassessed)
306. Species Cocconeis littoralis Subrahmanyan, 1946 (uncertain > unassessed)
307. Species Cocconeis longa Ehrenberg, 1841 (1843) (uncertain > unassessed)
308. Species Cocconeis lorenziana Grunow in Schmidt et al., 1894 (uncertain > unassessed)
309. Species Cocconeis lorenziana Grunow in Schmidt et al., 1894 (uncertain > unassessed)
310. Species Cocconeis lorenziana (Grunow) H. Peragallo, 1888 (uncertain > unassessed)
311. Species Cocconeis lunata Leuduger-Fortmorel, 1879 (uncertain > unassessed)
312. Species Cocconeis lunyacsekii Pantocsek, 1892 (uncertain > unassessed)
313. Species Cocconeis lyra A.Schmidt, 1874
314. Species Cocconeis macropunctata Hajós, 1968 (uncertain > unassessed)
315. Species Cocconeis magnifica Janisch, 1894 (uncertain > unassessed)
316. Species Cocconeis magnoareolata Al-Handal, Riaux-Gob., R.Jahn & A.K.Wulff in Al-Handal et al., 2019
317. Species Cocconeis maharashtrensis Sarode & Kamat, 1984
318. Species Cocconeis major Gregory, 1857 (uncertain > unassessed)
319. Species Cocconeis mammalis (Castracane) F.W. Mills, 1933 accepted as Rhaphoneis mammalis Castracane, 1886 (uncertain > unassessed)
320. Species Cocconeis margaritifera Ehrenberg, 1844 (uncertain > unassessed)
321. Species Cocconeis marginata Grunow in Cleve & Möller, 1879 (uncertain > unassessed)
322. Species Cocconeis marginata Kützing, 1844 (uncertain > unassessed)
323. Species Cocconeis marginifera Østrup, 1913 (uncertain > unassessed)
324. Species Cocconeis mascarenica Riaux-Gobin & Compère, 2008 (uncertain > unassessed)
325. Species Cocconeis materoxanae M. De Stefano, 2005
326. Species Cocconeis maxima (Grunow) H.Peragallo & M.Peragallo, 1897
327. Species Cocconeis mediterranea Kützing, 1844 (uncertain > unassessed)
328. Species Cocconeis meisteri C.Riaux-Gobin, P.Compère, M.Coste, F.Straub & L.Taxböck, 2014
329. Species Cocconeis melchiori Frenguelli & Orlando, 1958 (unaccepted > nomen nudum, invalidly published)
330. Species Cocconeis melchioroides Al-Handal, Riaux-Gobin, Romero & Wulff, 2008 (uncertain > unassessed)
331. Species Cocconeis mexicana Ehrenberg, 1843 (uncertain > unassessed)
332. Species Cocconeis microcephala (Kützing) Schonfeldt, 1907 accepted as Achnanthidium microcephalum Kützing, 1844 (uncertain > unassessed)
333. Species Cocconeis microscopica Cholnoky, 1959 (uncertain > unassessed)
334. Species Cocconeis minor Ebert (uncertain > unassessed)
335. Species Cocconeis minor (Kützing) Rabenhorst, 1853 accepted as Cocconeis pediculus var. minor Kützing, 1844 (uncertain > unassessed)
336. Species Cocconeis minumus Loseva, 1982 (uncertain > unassessed)
337. Species Cocconeis minuta (Cleve) Cleve, 1895 accepted as Achnanthidium minutum Cleve, 1891 (synonym)
338. Species Cocconeis minutissima (Kützing) Schönfeldt, 1907 accepted as Achnanthes minutissima var. minutissima Kützing, 1833 (uncertain > unassessed)
339. Species Cocconeis miocenica Hajós, 1959 (uncertain > unassessed)
340. Species Cocconeis molesta Kützing
341. Species Cocconeis monodii Amossé, 1970 (uncertain > unassessed)
342. Species Cocconeis montereyi Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
343. Species Cocconeis mormonum Ehrenberg, 1871 (uncertain > unassessed)
344. Species Cocconeis moronensis A.W.F.Schmidt, 1894 (uncertain > unassessed)
345. Species Cocconeis morrisiana W. Smith in W. Gregory, 1857 (uncertain > unassessed)
346. Species Cocconeis morrisii W. Smith, 1857 (uncertain > unassessed)
347. Species Cocconeis multiperforata M. De Stefano, D. Marino & L. Mazzella, 2000 (uncertain > unassessed)
348. Species Cocconeis nagumoi H.Suzuki, 2006
349. Species Cocconeis namaquensis Giffen, 1984 (uncertain > unassessed)
350. Species Cocconeis nanaimoensis MacKay in L.W. Bailey & MacKay, 1915 (uncertain > unassessed)
351. Species Cocconeis nanoburyatica Kulikovskiy & Lange-Bertalot, 2016
352. Species Cocconeis napukensis C.Riaux-Gobin, P.Compère, M.Coste, F.Straub & L.Taxböck, 2014
353. Species Cocconeis navicula Ehrenberg, 1840 (uncertain > unassessed)
354. Species Cocconeis navicularis Ehrenberg, 1854 (uncertain > unassessed)
355. Species Cocconeis naviculoides Greville (uncertain > unassessed)
356. Species Cocconeis neocaledonica Maillard ex Lange-Bertalot & Steidorf in Moser, Steindorf & Lange-Bertalot, 1995 (uncertain > unassessed)
357. Species Cocconeis neodiminuta Krammer, 1990 (uncertain > unassessed)
358. Species Cocconeis neogradensis Pantocsek, 1886 (uncertain > unassessed)
359. Species Cocconeis neogranulata VanLandingham, 1968 (uncertain > unassessed)
360. Species Cocconeis neothumensis Krammer, 1991 (uncertain > unassessed)
361. Species Cocconeis neuquina Frenguelli, 1942
362. Species Cocconeis nidulans Kützing accepted as Frustulia nidulans Brébisson (uncertain > unassessed)
363. Species Cocconeis nidulans Lobarzewsky, 1840 (uncertain > unassessed)
364. Species Cocconeis nidulus Edsbagge, 1968 (uncertain > unassessed)
365. Species Cocconeis nigricans Kützing (uncertain > unassessed)
366. Species Cocconeis ningpoensis Petit, 1881 (uncertain > unassessed)
367. Species Cocconeis nitens Edsbagge, 1968 (uncertain > unassessed)
368. Species Cocconeis nitida Gregory, 1857 (uncertain > unassessed)
369. Species Cocconeis nitidula Mann, 1937 (uncertain > unassessed)
370. Species Cocconeis nitidulans Wolle, 1890 (uncertain > unassessed)
371. Species Cocconeis nodulifera Grove & Sturt, 1887 (uncertain > unassessed)
372. Species Cocconeis nortina Rivera, 1973 (uncertain > unassessed)
373. Species Cocconeis norvegica Grunow, 1878 (uncertain > unassessed)
374. Species Cocconeis nosybetiana Riaux-Gobin & Witkowski, 2019
375. Species Cocconeis notabilis Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
376. Species Cocconeis notabilis Pantocsek, 1892 (uncertain > unassessed)
377. Species Cocconeis notata Petit, 1877
378. Species Cocconeis nuda Pantocsek, 1912 (uncertain > unassessed)
379. Species Cocconeis nugalas Hohn & Hellerman, 1966 (uncertain > unassessed)
380. Species Cocconeis nummularia (Greville) H.Peragallo & M.Peragallo, 1897 accepted as Navicula nummularia Greville, 1859 (uncertain > unassessed)
381. Species Cocconeis nutans Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
382. Species Cocconeis oamaruensis Schrader, 1969 (uncertain > unassessed)
383. Species Cocconeis oblonga Kützing, 1844 (uncertain > unassessed)
384. Species Cocconeis oblongata Edsbagge, 1968 (uncertain > unassessed)
385. Species Cocconeis occulta Meister, 1937 (uncertain > unassessed)
386. Species Cocconeis oceanica Ehrenberg, 1840 (uncertain > unassessed)
387. Species Cocconeis ocellata Mann, 1925 (uncertain > unassessed)
388. Species Cocconeis oculuscatis Brun, 1891 (uncertain > unassessed)
389. Species Cocconeis oelandica Cleve-Euler, 1953 (uncertain > unassessed)
390. Species Cocconeis oestrupii Héribaud in Héribaud et al., 1920 (uncertain > unassessed)
391. Species Cocconeis oestrupii Cleve-Euler, 1915 (uncertain > unassessed)
392. Species Cocconeis olivacea Meister, 1937 (uncertain > unassessed)
393. Species Cocconeis orbicularis Frenguelli & Orlando, 1958 accepted as Australoneis frenguellii (Riaux-Gobin & J.M.Guerrero) J.M.Guerrero & Riaux-Gobin, 2021 (basionym)
394. Species Cocconeis orcii Klyashtorin, 1962 (uncertain > unassessed)
395. Species Cocconeis ornata Gregory, 1857
396. Species Cocconeis ospristis Mann, 1925 (uncertain > unassessed)
397. Species Cocconeis ovalis Bond, 1968 (uncertain > unassessed)
398. Species Cocconeis pacifica Grunow, 1867 (uncertain > unassessed)
399. Species Cocconeis paniformis Brun in Schmidt et al., 1894 (uncertain > unassessed)
400. Species Cocconeis paradoxa Ehrenberg, 1854 (uncertain > unassessed)
401. Species Cocconeis parallela Bailey, 1924 (uncertain > unassessed)
402. Species Cocconeis parmula Harvey & J.W. Bailey, 1853 (1854) (uncertain > unassessed)
403. Species Cocconeis parthenopoea Pedicino in Rabenhorst, 1870 (uncertain > unassessed)
404. Species Cocconeis patavina Meneghini ms. in Kützing, 1849 (uncertain > unassessed)
405. Species Cocconeis patrickii Reimer, 1961 (uncertain > unassessed)
406. Species Cocconeis pavini E. Manguin, 1954 (uncertain > unassessed)
407. Species Cocconeis pediculus Ehrenberg, 1838
408. Species Cocconeis pellucida Hantzsch, 1863
409. Species Cocconeis pellucida Grunow, 1863 (uncertain > unassessed)
410. Species Cocconeis pellucida Truan y Luard & Witt, 1888 (uncertain > unassessed)
411. Species Cocconeis pelta A.Schmidt, 1874
412. Species Cocconeis peltoides Hustedt, 1939 (uncertain > unassessed)
413. Species Cocconeis pensacolae Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
414. Species Cocconeis peregrina Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
415. Species Cocconeis perpusilla Pantocsek, 1889 (uncertain > unassessed)
416. Species Cocconeis persica Rabenhorst, 1853 (uncertain > unassessed)
417. Species Cocconeis peruviana Kützing, 1844 (uncertain > unassessed)
418. Species Cocconeis pethöi Pantocsek, 1892 (uncertain > unassessed)
419. Species Cocconeis pinnata A.Y. Al-Handal, C. Riaux-Gobin & A. Wulff, 2010 (uncertain > unassessed)
420. Species Cocconeis pinnata (Hustedt) Cleve-Euler, 1934 accepted as Achnanthes pinnata var. pinnata Hustedt, 1922 (uncertain > unassessed)
421. Species Cocconeis pinnata W.Gregory ex Greville, 1859
422. Species Cocconeis pinnularia Kützing, 1844 (uncertain > unassessed)
423. Species Cocconeis placentra 'Ehrenberg' in Murobuse, 1941 (uncertain > unassessed)
424. Species Cocconeis placentula Ehrenberg, 1838
425. Species Cocconeis placentula (Skvortzow) Skabichevskii, 1977 (uncertain > unassessed)
426. Species Cocconeis placentula (Skvortzow) Skabichevskii, 1977 accepted as Cocconeis placentula var. baicalensis Skvortzov & Meyer, 1928 (uncertain > unassessed)
427. Species Cocconeis placentuloides Guslakov, 1992 (uncertain > unassessed)
428. Species Cocconeis pliocaenica Krasske, 1933 (uncertain > unassessed)
429. Species Cocconeis poretzkyi Skvortzov, 2012 (uncertain)
430. Species Cocconeis portei E.O'Meara, 1867
431. Species Cocconeis portii O'Meara, 1867 (uncertain > unassessed)
432. Species Cocconeis pottercovei A.Y.Al-Handal, C.Riaux-Gobin & A.Wulff, 2010 (uncertain > unassessed)
433. Species Cocconeis praecellens Pantocsek (uncertain > unassessed)
434. Species Cocconeis praestans Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
435. Species Cocconeis praetexta Ehrenberg, 1843 (uncertain > unassessed)
436. Species Cocconeis pribilofensis Hanna, 1970 (uncertain > unassessed)
437. Species Cocconeis probata Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
438. Species Cocconeis problematica Van Landingham, 1967 (uncertain > unassessed)
439. Species Cocconeis producta Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
440. Species Cocconeis pseudocostata Romero, 1996 (uncertain > unassessed)
441. Species Cocconeis pseudodebesii Proschkina-Lavrenko, 1963 (uncertain > unassessed)
442. Species Cocconeis pseudodiruptoides Foged, 1975 (uncertain > unassessed)
443. Species Cocconeis pseudofluminensis Hajós, 1973 (uncertain > unassessed)
444. Species Cocconeis pseudograta Hustedt, 1939 (uncertain > unassessed)
445. Species Cocconeis pseudolineata (Geitler) Lange-Bertalot, 2004 accepted as Cocconeis placentula var. pseudolineata Geitler, 1927 (uncertain > unassessed)
446. Species Cocconeis pseudomarginata [sensu] Janisch (in Rabenhorst), 1863 (uncertain > unassessed)
447. Species Cocconeis pseudomarginata Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
448. Species Cocconeis pseudomarginata Forti, 1908 (uncertain > unassessed)
449. Species Cocconeis pseudomarginata Gregory, 1857
450. Species Cocconeis pseudonotata M.De Stefano & D.Marino, 2001 (uncertain > unassessed)
451. Species Cocconeis pseudornata Riaux-Gobin, Igersheim, Ector & Witkowski
452. Species Cocconeis pseudothumensis Reichardt, 1982 (uncertain > unassessed)
453. Species Cocconeis pulchella Cleve-Euler, 1915 (uncertain > unassessed)
454. Species Cocconeis pulcherrima Hustedt, 1952 (uncertain > unassessed)
455. Species Cocconeis pumila Kützing, 1844 (uncertain > unassessed)
456. Species Cocconeis punctata Ehrenberg, 1841 (uncertain > unassessed)
457. Species Cocconeis punctata Lobarzewsky, 1840 (uncertain > unassessed)
458. Species Cocconeis punctata Schumann, 1867 (uncertain > unassessed)
459. Species Cocconeis punctatissima Greville, 1857 (uncertain > unassessed)
460. Species Cocconeis pusilla Frenguelli, 1939 (uncertain > unassessed)
461. Species Cocconeis pusilla Archibald, 1966 (uncertain, Likely a later homonym of C. pusilla Frenguelli)
462. Species Cocconeis pygmaea Kützing, 1844 (uncertain > unassessed)
463. Species Cocconeis pygmaea Schumann, 1864 (uncertain > unassessed)
464. Species Cocconeis quadrata Roper ms in De Toni, 1891 (uncertain > unassessed)
465. Species Cocconeis quadratarea Østrup, 1910 (uncertain > unassessed)
466. Species Cocconeis quarnerensis (Grunow) A.Schmidt, 1874 (uncertain > unassessed)
467. Species Cocconeis radiata Wigand, 1860 (uncertain > unassessed)
468. Species Cocconeis radiata Gregory, 1857 (uncertain > unassessed)
469. Species Cocconeis raeana Pantocsek, 1889 (uncertain > unassessed)
470. Species Cocconeis recurva Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
471. Species Cocconeis reedii Desikachary & Sreelatha, 1989 (uncertain > unassessed)
472. Species Cocconeis regalis [sensu?] H. Peragallo, 1888 (uncertain > unassessed)
473. Species Cocconeis regalis Greville, 1859 (uncertain > unassessed)
474. Species Cocconeis regina Johnston, 1860 (uncertain > unassessed)
475. Species Cocconeis reicheltii Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
476. Species Cocconeis reinholdii Hendey, 1939 (uncertain > unassessed)
477. Species Cocconeis reticulata Cleve (uncertain > unassessed)
478. Species Cocconeis rhombea Ehrenberg, 1845 (uncertain > unassessed)
479. Species Cocconeis rhombifera Harvey & J.W. Bailey, 1854 (uncertain > unassessed)
480. Species Cocconeis rhomboidalis Hyyppa according to Hollerbakh & Krasavina, 1971 (uncertain > unassessed)
481. Species Cocconeis rhombus Ehrenberg, 1840 (uncertain > unassessed)
482. Species Cocconeis riparia Brun in Schmidt et al., 1894 (uncertain > unassessed)
483. Species Cocconeis rivalis Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
484. Species Cocconeis robusta Jurilj, 1954 (uncertain > unassessed)
485. Species Cocconeis robusta Leuduger-Fortmorel, 1879 (uncertain > unassessed)
486. Species Cocconeis roperiana Habirshaw et al., 1877-1894 (uncertain > unassessed)
487. Species Cocconeis rouxi (uncertain > unassessed)
488. Species Cocconeis rouxii Héribaud & Brun, 1893 accepted as Cocconeis rouxii (Héribaud & Brun) C.E.Wetzel & Ector, 2019 (synonym)
489. Species Cocconeis rouxii (Héribaud & Brun) C.E.Wetzel & Ector, 2019
490. Species Cocconeis rudis Frenguelli, 1953 accepted as Planothidium salvadorianum (Hustedt) Lange-Bertalot, 1999 (Taxonomic synonym)
491. Species Cocconeis rugosa Sovereign, 1958 (uncertain > unassessed)
492. Species Cocconeis sabangii Meister, 1932 (uncertain > unassessed)
493. Species Cocconeis salina (Kützing) Rabenhorst, 1853 accepted as Cocconeis pediculus var. salina Kützing, 1844 (uncertain > unassessed)
494. Species Cocconeis sancti-pauli Heiden in Heiden & Kolbe, 1928 (uncertain > unassessed)
495. Species Cocconeis sarmatica Hajós, 1973 (uncertain > unassessed)
496. Species Cocconeis sarmatica Pantocsek, 1902 (uncertain > unassessed)
497. Species Cocconeis sawensis A.Y.Al-Handal & C.Riaux-Gobin, 2014
498. Species Cocconeis scaettae V.Zanon, 1938 (uncertain > unassessed)
499. Species Cocconeis schippi Meister, 1934 (1935) (uncertain > unassessed)
500. Species Cocconeis schleinitzii Janisch in Schmidt et al., 1894 (uncertain > unassessed)
501. Species Cocconeis schmidtii Heiden in Heiden & Kolbe, 1928 (uncertain > unassessed)
502. Species Cocconeis schmidtii Cleve-Euler, 1953 (uncertain > unassessed)
503. Species Cocconeis schmidtii (Kisselev) Scheschukova (?) in Sabelina, 1961 (uncertain > unassessed)
504. Species Cocconeis schroederi Foged, 1966 (uncertain > unassessed)
505. Species Cocconeis schuetii (uncertain > unassessed)
506. Species Cocconeis schuettii van Heurck, 1909 accepted as Cocconeis antiqua J.A.Tempère & J.-J.Brun, 1889 † (synonym)
507. Species Cocconeis schulzii (Cleve-Euler) Cleve-Euler, 1953 accepted as Achnanthes Schulzii Cleve-Euler, 1932 (uncertain > unassessed)
508. Species Cocconeis scutata Pogrebnyak, 1953 (uncertain > unassessed)
509. Species Cocconeis scutelliformis Grunow in Van Heurck, 1880 (uncertain > unassessed)
510. Species Cocconeis scutellum Ehrenberg, 1838
511. Species Cocconeis scutellum Meunier, 1910 (uncertain > unassessed)
512. Species Cocconeis scutum Ehrenberg, 1854 (uncertain > unassessed)
513. Species Cocconeis sedimentaria Romero, 1996 (uncertain > unassessed)
514. Species Cocconeis semiaperta Hustedt, 1945 (uncertain > unassessed)
515. Species Cocconeis semipolita Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
516. Species Cocconeis senegalensis Brébisson in H.L. Smith, 1874-1879 (uncertain > unassessed)
517. Species Cocconeis septentrionalis Grunow, 1884 (uncertain > unassessed)
518. Species Cocconeis serians Grunow in Cleve & Möller, 1879 (uncertain > unassessed)
519. Species Cocconeis shikinensis Suzuki, Nagumo & J.Tanaka, 2001 (uncertain > unassessed)
520. Species Cocconeis sigma Pantocsek (uncertain > unassessed)
521. Species Cocconeis sigmacrux Mereschkowsky, 1902 (uncertain > unassessed)
522. Species Cocconeis sigmoidea Schumann, 1867 (uncertain > unassessed)
523. Species Cocconeis sigmoides R.Subrahmanyan, 1946 (uncertain > unassessed)
524. Species Cocconeis sigmoradians Tempère & Brun in Brun & Tempère, 1889 (uncertain > unassessed)
525. Species Cocconeis signata Peragallo & Peragallo, 1897 (uncertain > unassessed)
526. Species Cocconeis sijunghoensis R. Jahn & B. M. Suh in Jahn et al., 2020
527. Species Cocconeis similis Karsten, 1905 (uncertain > unassessed)
528. Species Cocconeis singularis Hagelstein, 1939
529. Species Cocconeis skvortzowii (Skvortzow) Scheschukova in Zabelina et al., 1951 accepted as Cocconeis placentula var. baikalensis Skvortzow, 1937 (uncertain > unassessed)
530. Species Cocconeis sol Ehrenberg, 1854 (uncertain > unassessed)
531. Species Cocconeis soukupi Frenguelli, 1939
532. Species Cocconeis sovereigni Hustedt, 1955 (uncertain > unassessed)
533. Species Cocconeis sparsipunctata Brun, 1891 (uncertain > unassessed)
534. Species Cocconeis spathulatum Shadbolt, 1854 (uncertain > unassessed)
535. Species Cocconeis speciosa Gregory, 1855
536. Species Cocconeis speciosa Ehrenberg (uncertain > unassessed)
537. Species Cocconeis speciosa Héribaud, 1893 (uncertain > unassessed)
538. Species Cocconeis spina-christi C.Riaux-Gobin, O.E. Romero, M.Coste & R.Galzin, 2013
539. Species Cocconeis splendida Gregory, 1857 accepted as Mastogloia splendida (Gregory) H.Pergallo, 1888 accepted as Cocconeis splendida var. splendida Gregory, 1857 (synonym)
540. Species Cocconeis stauroneiformis (W.Smith) H.Okuno, 1957 accepted as Cocconeis scutellum f. stauroneiformis Rabenhorst, 1864 (uncertain > unassessed)
541. Species Cocconeis stella Ehrenberg, 1854 (uncertain > unassessed)
542. Species Cocconeis stellata Ehrenberg, 1854 (uncertain > unassessed)
543. Species Cocconeis stompsii Cholnoky, 1963 (uncertain > unassessed)
544. Species Cocconeis striata Ehrenberg, 1843 (uncertain > unassessed)
545. Species Cocconeis stricta Ehrenberg, 1856 (uncertain > unassessed)
546. Species Cocconeis striolata Rabenhorst, 1853 (uncertain > unassessed)
547. Species Cocconeis subacuta Ehrenberg, 1858 (uncertain > unassessed)
548. Species Cocconeis subantarctica Riaux-Gobin & Witkowski, 2017
549. Species Cocconeis subdirupta Cholnoky, 1959 (uncertain > unassessed)
550. Species Cocconeis sublittoralis Hendey, 1951 (uncertain > unassessed)
551. Species Cocconeis subtilis Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
552. Species Cocconeis subtilissima Meister, 1934 (1935) (uncertain > unassessed)
553. Species Cocconeis subzanskiensis Riaux-Gobin, Witkowski, Ector & Igersheim, 2018
554. Species Cocconeis suecica Lak, 1954 (uncertain > unassessed)
555. Species Cocconeis sulcata Harvey & J.W. Bailey, 1854 (uncertain > unassessed)
556. Species Cocconeis superba C.Janisch, 1861 (uncertain > unassessed)
557. Species Cocconeis surirelloides Grunow, 1868 (uncertain > unassessed)
558. Species Cocconeis suzukii C.Riaux-Gobin, P.Compère, M.Coste, F.Straub & L.Taxböck, 2014
559. Species Cocconeis taeniata Ehrenberg, 1854 (uncertain > unassessed)
560. Species Cocconeis tenella Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
561. Species Cocconeis tenera Schumann, 1867 (uncertain > unassessed)
562. Species Cocconeis tenuis Hustedt, 1939 (uncertain > unassessed)
563. Species Cocconeis tenuis (Dujardin) Örsted, 1844 accepted as Surirella tenuis Dujardin, 1842 (uncertain > unassessed)
564. Species Cocconeis tenuissima Naegeli ex Kützing, 1849 (uncertain > unassessed)
565. Species Cocconeis tenuistriata Lin & Chin, 1980 (uncertain > unassessed)
566. Species Cocconeis testudo Giffen, 1963 (uncertain > unassessed)
567. Species Cocconeis thalassiana O.E.Romero & F.O.López-Fuerte, 2013
568. Species Cocconeis theinemannii Hustedt, 1954
569. Species Cocconeis therezieni LeCohu & Maillard, 1983 (uncertain > unassessed)
570. Species Cocconeis thienemanni Hustedt, 1954 (uncertain > unassessed)
571. Species Cocconeis thomasiana Brun, 1895 accepted as Cocconeis disculus (Schumann) Cleve, 1882 (synonym)
572. Species Cocconeis thumensis A.Mayer, 1919 (uncertain > unassessed)
573. Species Cocconeis thwaitesii W.Smith, 1853
574. Species Cocconeis titicacaensis Frenguelli, 1939
575. Species Cocconeis toniana Pantocsek according to Mills (uncertain > unassessed)
576. Species Cocconeis tortilis H.Suzuki, 2014
577. Species Cocconeis totarae Brun, 1894 (uncertain > unassessed)
578. Species Cocconeis toxa Carter & Denny, 1987 (uncertain > unassessed)
579. Species Cocconeis trachyderma Meister, 1934 (1935) accepted as Achnanthes trachyderma (F.Meister, 1934) (uncertain > unassessed)
580. Species Cocconeis trachytica Pantocsek (uncertain > unassessed)
581. Species Cocconeis transversa Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
582. Species Cocconeis transversalis Gregory, 1855 (uncertain > unassessed)
583. Species Cocconeis trilineatus M. Peragallo & Héribaud in Héribaud, 1893 (uncertain > unassessed)
584. Species Cocconeis trinodis (Arnott ex Ralfs in Pritchard) Schonfeldt, 1907 (uncertain > unassessed)
585. Species Cocconeis trinotata Schmidt in Schmidt et al., 1895 (uncertain > unassessed)
586. Species Cocconeis triumphis Hanna & Grant, 1926 (uncertain > unassessed)
587. Species Cocconeis tuamotuana Riaux-Gobin et al., 2015
588. Species Cocconeis tumida Ehrenberg, 1854 (uncertain > unassessed)
589. Species Cocconeis turgida Ehrenberg in Ralfs in Pritchard, 1854 (uncertain > unassessed)
590. Species Cocconeis undata Ehrenberg, 1854 (uncertain > unassessed)
591. Species Cocconeis undulata Ehrenberg, 1838 (uncertain > unassessed)
592. Species Cocconeis utermöhli Hustedt, 1954 (uncertain > unassessed)
593. Species Cocconeis utermohlii Hustedt, 1954
594. Species Cocconeis vairaensis Ricard, 1975 (uncertain > unassessed)
595. Species Cocconeis vanheurckii Cleve, 1895 (uncertain > unassessed)
596. Species Cocconeis verrucosa Brun, 1891 (uncertain > unassessed)
597. Species Cocconeis versicolor Brun, 1891 (uncertain > unassessed)
598. Species Cocconeis vetusta Schmidt in Schmidt et al., 1894 (uncertain > unassessed)
599. Species Cocconeis vexans Schmidt, 1874 (uncertain > unassessed)
600. Species Cocconeis villosa H.Peragallo, 1888 (uncertain > unassessed)
601. Species Cocconeis vitellina Schoeman in Schoeman & Meaton, 1982 (uncertain > unassessed)
602. Species Cocconeis vitrea J.-J.Brun (uncertain > unassessed)
603. Species Cocconeis voigtii Meister, 1937 (uncertain > unassessed)
604. Species Cocconeis voluta J.-J.Brun (uncertain > unassessed)
605. Species Cocconeis vrangoensis Al-Handal & Riaux-Gob. in Al-Handal et al., 2019
606. Species Cocconeis wheeleri Hart, 1935 (uncertain > unassessed)
607. Species Cocconeis wienckensis Petit, 1908 (uncertain > unassessed)
608. Species Cocconeis wigandii Rabenhorst, 1864 (uncertain > unassessed)
609. Species Cocconeis woodii Reyes-Vasquez, 1970 (uncertain > unassessed)
610. Species Cocconeis wrightii O'Meara, 1867 (uncertain > unassessed)

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