1. Genus Acanthodiscus Pant., 1892 †
2. Genus Achnanthepyla Perag., 1921
3. Genus Acigonium S. Komura, 1999 †
4. Genus Actinodictyon J. Pantocsek, 1889 †
5. Genus Actinodiscus R.K. Greville, 1863 †
6. Genus Actinogonium C.G. Ehrenberg, 1847 †
7. Genus Actinogramma C.G. Ehrenberg, 1872
8. Genus Actinoneis P.T. Cleve, 1895
9. Genus Actinophaenia G. Shadbolt, 1854
10. Genus Actinostephanos G.K. Khursevich, 1989
11. Genus Aggericorona S. Komura, 2006 †
12. Genus Alloeoneis J. Schumann, 1867
13. Genus Alloioneis J. Schumann ex P.T. Cleve, 1878
14. Genus Alveolophora A.I. Moisseeva & T.L. Nevretdinova, 1990 †
15. Genus Ambistria K.E. Lohman & G.W. Andrews, 1968 emend. Siver, 2019 †
16. Genus Amblypyrgus R. Gersonde & D.M. Harwood, 1990 †
17. Genus Amphidiscus C.G. Ehrenberg, 1839 †
18. Genus Amphipentas C.G. Ehrenberg, 1840 †
19. Genus Amphiraphia J.-Y. Chen & H.-Z. Zhu, 1983
20. Genus Amphitrite P.T. Cleve ex O. Kunze, 1891
21. Genus Amphitropis L. Rabenhorst, 1868
22. Genus Amphoropsis (Cleve) Mereschkowsky, 1901
23. Genus Ancylopyrgus R. Gersonde & D.M. Harwood, 1990 †
24. Genus Angulopyxidium A.G. Vologdin, 1962 †
25. Genus Anisodiscus A. Grunow in J. Pantocsek, 1886
26. Genus Anisoraphe R.E. Norris, 1971
27. Genus Annellus J. Tempère in J. Tempère & H. Peragallo, 1908 †
28. Genus Annularius S. Komura, 2005 †
29. Genus Antelminellia F. Schütt, 1893
30. Genus Anthemodiscus J.W. Barker & S.H. Meakin, 1944 †
31. Genus Anuloplicata (Z.I.Glezer) Z.I.Glezer, 1992 †
32. Genus Aporidiscus Rattray in A. Grunow, 1889
33. Genus Aporodiscus J. Rattray in A. Schmidt et al., 1890
34. Genus Apteroe P.T. Cleve, 1891
35. Genus Apterosoma S.Komura, 1997 †
36. Genus Archaegladiopsis V.A. Nikolaev & D.M. Harwood, 1997
37. Genus Archaegoniothecium J.Witkowski, D.M.Harwood & M.Kulikovskiy, 2012 †
38. Genus Archepyrgus R. Gersonde & D.M. Harwood, 1990 †
39. Genus Archimedea J.B.M. Bory de Saint-Vincent, 1824
40. Genus Argonauta G. Karsten in A. Engler & K. Prantl, 1928
41. Genus Arthrogyra C.G. Ehrenberg ex Ralfs in Pritchard, 1861
42. Genus Asterodiscus A.S. Johnson, 1852
43. Genus Astrosyne Ashworth & Lobban, 2012
44. Genus Aulacocystis A.H. Hassall, 1845
45. Genus Auriculopsis N.I. Hendey, 1964
46. Genus Bacterosira H.H. Gran, 1900
47. Genus Bactryllium O. Heer, 1853
48. Genus Baculites J. Grüss, 1928
49. Genus Badiaga Sprengel
50. Genus Balanosa S. Komura, 1996 †
51. Genus Basilicostephanus R. Gersonde & D.M. Harwood, 1990 †
52. Genus Baxteria H. Van Heurck, 1896
53. Genus Belonastrum E. Lemmermann, 1900
54. Genus Belonastrum (Lemmermann) F.E. Round & N.I. Maidana, 2001
55. Genus Belonidium C.G. Ehrenberg, 1854
56. Genus Bifibulatia H. Takano, 1983
57. Genus Bilingua R. Gersonde & D.M. Harwood, 1990 †
58. Genus Bipalla Z.I. Gleser, 1992 †
59. Genus Bogorovia A.P. Jousé, 1974 †
60. Genus Bolewskia B. Kwiecinska & J. Sieminska, 2000 †
61. Genus Bonea R. Ross & P.A. Sims, 1987 †
62. Genus Botellus F. Schütt, 1900
63. Genus Brachybaculites J. Grüss, 1928 †
64. Genus Brasiliella C. Zimmermann S.J., 1918
65. Genus Brenneckella H. Lohman, 1912
66. Genus Brevilinea P.A. Siver, P.B. Hamilton & E.A. Morales, 2008
67. Genus Brevisira K. Krammer, 2001
68. Genus Brunia J. Tempère ex G.B. De Toni, 1894
69. Genus Bruniopsis G. Karsten in A. Engler & K. Prantl, 1928
70. Genus Calcothrix N.A. Desvaux in C.A. Agardh, 1830
71. Genus Callimastogloia S. Komura, 2005 †
72. Genus Calodiscus L. Rabenhorst, 1853
73. Genus Calophyllum G. Shadbolt, 1854
74. Genus Calyptosporium D.M. Harwood & R. Gersonde, 1990 †
75. Genus Campylostylus G. Shadbolt ex C.S. Boyer, 1927
76. Genus Capsula J. Brun, 1896 †
77. Genus Carrodoria S.F.Gray corr.Kuntze, 1898
78. Genus Castracania G.B. De Toni, 1892 †
79. Genus Catillus N.I. Hendey, 1977
80. Genus Cavitatus D.M. Williams, 1989 †
81. Genus Centrodiscus Pantocsek, 1889
82. Genus Centroporus J. Pantocsek, 1889 †
83. Genus Ceratangula P.A. Sims, 2008 †
84. Genus Ceratodiscus S.H. Meakin, 1938 †
85. Genus Ceratophora Pantocsek, 1889
86. Genus Chasea G D. Hanna, 1934 †
87. Genus Cheloniodiscus J. Pantocsek, 1889 †
88. Genus Chuniella G. Karsten, 1905
89. Genus Cladogramma C.G. Ehrenberg, 1854 †
90. Genus Cladomphalus J.W.Bailey, 1894
91. Genus Clavicula J. Pantocsek, 1886 †
92. Genus Clavularia R.K. Greville, 1865 †
93. Genus Clevamphora C. Mereschkowsky, 1903
94. Genus Cleveia J. Pantocsek in J. Tempère, 1895
95. Genus Clevia C. Mereschkowsky, 1902
96. Genus Climacidium C.G. Ehrenberg, 1870
97. Genus Climacosira A. Grunow, 1862
98. Genus Clipeoparvus J. Woodbridge, E.J. Cox & N. Roberts in Woodbridge et al., 2010
99. Genus Cocconeiopsis A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000
100. Genus Coenobiodiscus A.R. Loeblich III, W.W. Wight & W.M. Darley, 1968
101. Genus Collumicylindrus S. Komura, 2005 †
102. Genus Cometes H.Edsbagge, 1966
103. Genus Comperiella K.Sabbe & W.Vyverman, 2001
104. Genus Compositus V.N. Vekschina, 1960 †
105. Genus Concentrodiscus G.C. Khursevich, A.I. Moisseeva & G.A. Sukhova, 1989
106. Genus Confervea O.F. Müller, 1873
107. Genus Corbellia N.I. Maidana & F.E. Round, 1999
108. Genus Corinna P.A.C. Heiberg, 1863 †
109. Genus Coronia C.G. Ehrenberg, 1840
110. Genus Coronodiscus I. Suto, 2004 †
111. Genus Cortinocornus Z.I. Glezer, 1984 †
112. Genus Coscinophaena C.G. Ehrenberg, 1854
113. Genus Cosmiodiscus R.K. Greville, 1866 †
114. Genus Costopyxis Z.I. Glezer, 1984 †
115. Genus Cotyledon J. Brun, 1891
116. Genus Craspedopleura M. Poulin, 1993
117. Genus Craspedoporus R.K. Greville, 1863 †
118. Genus Creania M.P Olney in Olney, Bohaty, Harwood & Scherer, 2009 †
119. Genus Cristodiscus Z.I. Glezer & A.P. Olshtynskaya, 1994 †
120. Genus Crossophialus D.M. Harwood & R. Gersonde, 1990 †
121. Genus Crucidenticula F.Akiba & Y.Yanagisawa, 1986 †
122. Genus Crystalia Sommerfeld in J.B.M. Bory de Saint-Vincent, 1824
123. Genus Ctenophora A. de Brebisson ex F.T. Kützing, 1849
124. Genus Cultria (D. Metzeltin & H. Lange-Bertalot) D. Metzeltin & H. Lange-Bertalot, 2007
125. Genus Cultria D. Metzeltin & H. Lange-Bertalot, 1998
126. Genus Cussia H.-J. Schrader, 1974
127. Genus Cycloites J. Grüss, 1928
128. Genus Cycloplea V.B.A. Trevisan di San Leon, 1848
129. Genus Cyclosira H. Peragallo & M. Peragallo, 1907
130. Genus Cyclostephanopsis L. Loginova, 1993 †
131. Genus Cylindropyxis N.I. Hendey, 1964
132. Genus Cymatodiscus N.I. Hendey, 1958
133. Genus Cymatogonia A. Grunow, 1883
134. Genus Cymatotheca N.I. Hendey, 1958
135. Genus Cymbamphora P.T. Cleve, 1895
136. Genus Cymbellopsis K. Krammer, 1997
137. Genus Cymbophora (F.T. Kützing) A. de Brébisson, 1838
138. Genus Cymbosira F.T. Kützing, 1844
139. Genus Cypellachaetes D.M. Harwood & R. Gersonde, 1990 †
140. Genus Dactylacanthis S. Komura, 1999 †
141. Genus Dalai-Lama C. Mereschkowsky, 1906
142. Genus Dandrelion P. Lefebure, 1947
143. Genus Dasyangea D.M. Harwood & R. Gersonde, 1990 †
144. Genus Debya J. Rattray, 1888
145. Genus Debya J. Pantocsek, 1886
146. Genus Dendrelion J. Pantocsek, 1928
147. Genus Dendrella J.B.M. Bory de Saint-Vincent, 1822
148. Genus Dendrogonia S. Komura, 2007 †
149. Genus Dextradonator R. Ross & P.A. Sims, 1980 †
150. Genus Diatomosira V.B.A. Trevisan di San Leon, 1848
151. Genus Dichomenis C.G. Ehrenberg, 1862
152. Genus Dichotropiscus S. Komura, 1995 †
153. Genus Dickensoniaforma R.P. Scherer, 1997 †
154. Genus Dickieia M.J. Berkeley ex F.T. Kützing, 1844
155. Genus Dicladia C.G. Ehrenberg, 1844 †
156. Genus Dicladiopsis G.B. De Toni, 1894
157. Genus Dictyolampra C.G. Ehrenberg, 1847 †
158. Genus Dictyopyxis C.G. Ehrenberg, 1844
159. Genus Dimeractis S. Komura, 2001 †
160. Genus Dimerosira H. Peragallo in H. Peragallo & M. Peragallo, 1901
161. Genus Diommatetras S. Komura, 2001 †
162. Genus Diomphala C.G. Ehrenberg, 1842
163. Genus Diprora S.P. Main, 2003
164. Genus Disciferium A.G. Vologdin, 1962 †
165. Genus Discodiscus Gombos A. M. Jr., 1980 †
166. Genus Discoites J. Grüss, 1928
167. Genus Disconeis P.T. Cleve, 1895
168. Genus Discosira L. Rabenhorst, 1853
169. Genus Discus C. Stodder, 1879
170. Genus Dispinodiscus I. Suto, 2004 †
171. Genus Distichanthes C.G. Ehrenberg, 1854
172. Genus Dossetia F. Azpeitia, 1911 †
173. Genus Drepanotheca H.-J. Schrader ex Round, Crawford & Mann, 1990 †
174. Genus Druridgia A.S. Donkin, 1861
175. Genus Echinaria F.T. Kützing, 1844
176. Genus Echinodiscus A. Mann, 1925
177. Genus Ectodictyon G.C. Khursevich & G.P. Cherniaeva, 1989 †
178. Genus Ehrenbergiulva A. Witkowski, H. Lange-Bertalot & D. Metzeltin in A. Witkowski & H. Lange-Bertalot, 2004
179. Genus Emersonia J.W. Bailey, 1842
180. Genus Endosigma A. de Brébisson in Orbigny, 1848
181. Genus Endostauron Brébisson ex Möller, 1892
182. Genus Endostauron A. Grunow, 1880
183. Genus Entogonia R.K. Greville, 1863
184. Genus Entomogaster C.G. Ehrenberg, 1871
185. Genus Epiphalaina R.W. Holmes, S. Nagasawa & H. Takano, 1993
186. Genus Epithelion J. Pantocsek, 1905
187. Genus Epithema A. de Brébisson, 1838
188. Genus Euceratoneis A. Grunow in L. Rabenhorst, 1865
189. Genus Eumeridion F.T. Kützing, 1844
190. Genus Eunophora W. Vyverman, K. Sabbe & D.G. Mann in W. Vyverman et al., 1998
191. Genus Eunotiopsis A. Grunow in P.T. Cleve & J.D. Moller, 1879
192. Genus Eupleuria G.A.W. Arnott, 1858
193. Genus Eupodiscus C.G. Ehrenberg, 1844
194. Genus Eupterotrum S.Komura, 1997 †
195. Genus Eupyxidicula S.Blanco & C.E.Wetzel, 2016
196. Genus Eurossia P.A. Sims in A.D. Mahood, J.A. Barron & P.A. Sims, 1993 †
197. Family Eustephaniaceae
198. Genus Eustephanias S. Komura, 1999 †
199. Genus Excentron J. Ralfs in A. Pritchard, 1861
200. Genus Fenestrella R.K. Greville, 1863 †
201. Genus Fibula Wm. Smith, 1859
202. Genus Flexibiddulphia R. Simonsen, 1987 †
203. Genus Fogedia A. Witkowski, H. Lange-Bertalot, D. Metzeltin & G. Bafana, 1997
204. Genus Fontigonium P.A. Sims & N.I. Hendey, 1996
205. Genus Fossilarcus Blanco, 2020 †
206. Genus Fovirhombus S. Komura, 2005 †
207. Genus Fragilariella N.I. Hendey, 1958
208. Genus Fryxelliella A.K.S.K. Prasad, K.A. Riddle & R.J. Livingston, 1997
209. Genus Furtheca S.Blanco & C.E.Wetzel, 2016 †
210. Genus Fusiformella S. Komura, 2005 †
211. Genus Fusotheca C. Mereschkowsky, 1878
212. Genus Gato C.S.Lobban & J.N.Navarro, 2013
213. Genus Gemellodiscus I. Suto, 2004 †
214. Genus Giffenia F.E. Round & P.W. Basson, 1997
215. Genus Gladiopsis R. Gersonde & D.M. Harwood, 1990 †
216. Genus Gleseria E.G. Lupikina & L.M. Dolmatova, L.M., 1984 †
217. Genus Gloeonema C.G. Ehrenberg, 1856
218. Genus Gloionema C.A. Agardh, 1812
219. Genus Glyphodiscus R.K. Greville, 1862
220. Genus Golovenkinia N.I. Strelnikova, 1997 †
221. Genus Gomphogramma A. Braun in L. Rabenhorst, 1853
222. Genus Gomphonema C.A. Agardh, 1824
223. Genus Goniothecium C.G. Ehrenberg, 1843 †
224. Genus Grammatonema F.T. Kützing, 1845
225. Genus Grayia E. Grove & J. Brun in A. Schmidt et al., 1892
226. Genus Groentvedia N.I. Hendey, 1964
227. Genus Grovea A. Schmidt ex Van Heurck, 1896 †
228. Genus Grunoviella H. Van Heurck, 1896
229. Genus Grunowia L. Rabenhorst, 1864
230. Genus Grymaia J.W. Bailey ex L.W. Bailey, 1861
231. Genus Gutwinskiella G.B. De Toni, 1894
232. Genus Gyrocylindrus N.I. Strelnikova & V.A. Nikolaev, 1995 †
233. Genus Gyropandorus S.Komura, 1997 †
234. Genus Gyroptychus A. Schmidt in A. Schmidt et al., 1890 †
235. Genus Halionyx C.G. Ehrenberg, 1844
236. Genus Halonetrum H. Lohmann, 1919
237. Genus Halopetitia S.Blanco & C.E.Wetzel, 2016
238. Genus Halurina C. Zimmermann, 1918
239. Genus Hamatusia S.R. Stidolph, 1993
240. Genus Handmannia M. Peragallo in R. Handmann, 1913
241. Genus Hanicella Lobban & Ashworth, 2014
242. Genus Hantzschiopsidea J. Grüss, 1928
243. Genus Harrisonii E.M.Nelson
244. Genus Haynaldella J. Pantocsek, 1892
245. Genus Haynaldiella J. Pantocsek ex H. Van Heurck, 1896
246. Genus Haynaldiopsis S.Blanco & C.E.Wetzel, 2016 †
247. Genus Heibergia R.K. Greville, 1865 †
248. Genus Heliodiscus H. Van Heurck Fide G. Karsten in A. Engler & K. Prantl, 1928
249. Genus Heliopelta C.G. Ehrenberg, 1844
250. Genus Helisella A. Jurilj, 1949
251. Genus Helissella Jurilj, 1949
252. Genus Helminthopsidella P.C. Silva, 1970 †
253. Genus Hemizoster C.G. Ehrenberg, 1844
254. Genus Hendeya J.A. Long, D.P. Fuge & J. Smith, 1946
255. Genus Hendeyscoresbya S.Blanco & C.E.Wetzel, 2016
256. Genus Henseniella F. Schütt ex G.B. De Toni, 1894
257. Genus Henshawia A. Mann, 1925
258. Genus Hercotheca C.G. Ehrenberg, 1844 †
259. Genus Heribaudia M. Peragallo in J. Heribaud, 1893 †
260. Genus Heromphala P. Lefebure, 1947
261. Genus Heroneis P. Lefebure, 1947
262. Genus Hesslandia A. Cleve-Euler in A. Cleve-Euler & I. Hessland, 1947
263. Genus Heterangion S. Komura, 2001 †
264. Genus Heterocampa C.G. Ehrenberg, 1870 †
265. Genus Heterodictyon R.K. Greville, 1863 †
266. Genus Heteromphala C.G. Ehrenberg, 1859
267. Genus Heteroneis P.T. Cleve, 1895
268. Genus Heterostephania C.G. Ehrenberg, 1854
269. Genus Himantidium C.G. Ehrenberg, 1840
270. Genus Himantosoma V.B.A. Trevisan di San Leon, 1848
271. Genus Homalodiscus A.S. Orsted, 1844
272. Genus Horodiscus G D. Hanna, 1927 †
273. Genus Horstia J. Sieminska & B. Kwiecinska, 2002 †
274. Genus Humbugodiscus J. Deby, 1890
275. Genus Hustedtia F. Meister, 1932
276. Genus Hustedtiella R. Simonsen, 1960
277. Genus Huttonia E. Grove & G. Sturt, 1887
278. Genus Hyalodictya C.G. Ehrenberg, 1871
279. Genus Hyalodiscopsis T.F. Kozyrenko & T.V. Lativska, 1992
280. Genus Hyalogramma M.Garcia, 2012
281. Genus Hyalopyxis I.V. Makarova, 1989 †
282. Genus Hyalosira F.T. Kützing, 1844
283. Genus Hyalotrochus D.M. Harwood & R. Gersonde, 1990 †
284. Genus Hydrolinum H.F. Link, 1820
285. Genus Hydrosirella F. Hustedt, 1952 †
286. Genus Hylobiblium Wolle, 1894
287. Genus Hyperion Gombos A. M. Jr., 1983 †
288. Genus Hystrix J.B.M. Bory de Saint-Vincent, 1822
289. Genus Ikebea S. Komura, 1975 †
290. Genus Imparvalvia S. Komura, 2007 †
291. Genus Incisoria M. Hajos in M. Hajos & H. Stradner, 1975 †
292. Genus Insilella C.G. Ehrenberg, 1845
293. Genus Isodiscus J. Rattray, 1888
294. Genus Isomeria Chevallier
295. Genus Isthmiella P.T. Cleve, 1873
296. Genus Janischia A. Grunow in H. Van Heurck, 1883
297. Genus Jousea Z.I. Glezer, 1967
298. Genus Kannoa S. Komura, 1980 †
299. Genus Katahiraia S. Komura, 1976 †
300. Genus Kentrodiscus J. Pantocsek, 1889 †
301. Genus Kerkis R. Gersonde & D.M. Harwood, 1990 †
302. Genus Kidoa S. Komura, 1979 †
303. Genus Kozhowia M.S.Kulikowskiy & H.Lange-Bertalot, 2012
304. Genus Kozloviella A.P. Jousé, 1973 †
305. Genus Kreagra R. Gersonde & D.M. Harwood, 1990 †
306. Genus Ktenodiscus J. Pantocsek, 1889
307. Genus Kuemmerlea J.A. Krenner, 1926
308. Genus Lacustriella H.Lange-Bertalot, M.S.Kulikovskiy & D.Metzeltin, 2012
309. Genus Lamella J. Brun, 1894
310. Genus Lamprotediscus J. Pantocsek, 1892 †
311. Genus Lancineis G.W. Andrews, 1990 †
312. Genus Lauderiopsis C.H. Ostenfeld & J. Schmidt, 1902
313. Genus Lentiliforma S. Komura, 2006 †
314. Genus Leptoscaphos H.-J. Schrader, 1969 †
315. Genus Leudugeria J. Tempère ex H. Van Heurck, 1896
316. Genus Libellus P.T. Cleve, 1873
317. Genus Ligulatium A.G. Vologdin, 1962 †
318. Genus Lingulatium
319. Genus Lioneis C.G. Ehrenberg, 1861
320. Genus Liostephania C.G. Ehrenberg, 1847 †
321. Genus Liparogyra C.G. Ehrenberg, 1848
322. Genus Liradiscus R.K. Greville, 1865 †
323. Genus Liriogramma R.W. Kolbe, 1954
324. Genus Lisitzinia A.P. Jousé, 1978 †
325. Genus Lithobotrys C.G. Ehrenberg, 1844
326. Genus Lobarzewskya V.B.A. Trevisan di San Leon, 1848
327. Genus Lobodiscus Ye.G. Lupikina & G.K. Khursevich, 1991 †
328. Genus Lomonycus S. Komura, 1996 †
329. Genus Longinata M. Hajos in M. Hajos & H. Stradner, 1975 †
330. Genus Lophotheca H.-J. Schrader, 1969 †
331. Genus Lunella P. Snoeijs, 1996
332. Genus Lunulina J.B.M. Bory de Saint-Vincent, 1822
333. Genus Lysicyclia C.G. Ehrenberg, 1856
334. Genus Lysigonium H.F. Link, 1820
335. Genus Macrora G D. Hanna, 1932 †
336. Genus Maluina R. Ross & P.A. Sims, 1987 †
337. Genus Mammidion J.A. Long, D.P. Fuge & J. Smith, 1946 †
338. Genus Mammula G. Karsten in A. Engler & K. Prantl, 1928
339. Genus Margaritoxon C. Janisch, 1862
340. Genus Margaritum H. Moreira Filho, 1968
341. Genus Mastodiscus J.W. Bailey, 1854
342. Genus Mediaria V.S. Scheschukova-Poretzkaja, 1962 †
343. Genus Melchersiela C. Teixeira, 1959
344. Genus Melotomus Corda
345. Genus Meretrosulus G D. Hanna, 1927 †
346. Genus Meristosolen D.M. Harwood & R. Gersonde, 1990 †
347. Genus Mesasterias C.G. Ehrenberg, 1872
348. Genus Mesodictyopsis Khursevich, Iwashita, Kociolek & Fedenya in Khursevich et al., 2004 †
349. Genus Micrampulla G D. Hanna, 1927 †
350. Genus Microneis P.T. Cleve, 1895
351. Genus Microorbis R. Gersonde & D.M. Harwood, 1990 †
352. Genus Microsolenia H. Takano, 1998
353. Genus Microspodiscus A. Grunow in H. Van Heurck, 1883
354. Genus Microstigma (P.T. Cleve) F. Meister, 1919
355. Genus Microtheca C.G. Ehrenberg, 1838
356. Genus Mitralifer A.G. Vologdin, 1962 †
357. Genus Moelleria P.T. Cleve, 1873
358. Genus Moisseevia N.I. Strelnikova, 1997 †
359. Genus Monema R.K. Greville, 1827
360. Genus Monema M.J. Berkeley, 1833
361. Genus Monile R. Ross & P.A. Sims, 1987 †
362. Genus Monobrachia H.-J. Schrader in H.-J. Schrader & J. Fenner, 1976 †
363. Genus Monocis P. Lefebure, 1947
364. Genus Monocladia I. Suto, 2003 †
365. Genus Monogramma C.G. Ehrenberg, 1843
366. Genus Monopsia E. Grove & G. Sturt, 1887 †
367. Genus Muelleriopsis N.I. Hendey, 1972 †
368. Genus Nanofrustulum F.E. Round, H. Hallsteinsen & E. Paasche, 1999
369. Genus Nanoneis R.E. Norris, 1973
370. Genus Naunema C.G. Ehrenberg, 1838
371. Genus Naviculonema C.L.Graeff, J.P.Kociolek & S.R.Rushforth, 2013
372. Genus Neidiomorpha H. Lange-Bertalot & M. Cantonati in M. Cantonati, H. Lange-Bertlaot & N. Angeli, 2010
373. Genus Nematoplata J.B.M. Bory de Saint-Vincent, 1822
374. Genus Neobrunia O. Kuntze, 1894 †
375. Genus Neodetonia S. Blanco, 2011
376. Genus Neograya O. Kuntze, 1898
377. Genus Neomoelleria S.Blanco & C.E.Wetzel, 2016
378. Genus Nephroneis M.C. Amspoker, 1989
379. Genus Ninastrelnikovia H.Lange-Bertalot & A.Fuhrmann, 2014
380. Genus Nitzschiopsidea J. Grüss, 1928
381. Genus Noszkya P. Lefebure & E. Cheneviere, 1939 †
382. Genus Nothoceratium G.B. De Toni, 1894
383. Genus Ocularia E.J. Quekett, 1844
384. Genus Odontodiscus C.G. Ehrenberg, 1845 †
385. Genus Odontotropis A. Grunow, 1884 †
386. Genus Omphalopelta C.G. Ehrenberg, 1844
387. Genus Omphalophortron S. Komura, 2005 †
388. Genus Omphalopsis R.K. Greville, 1863
389. Genus Omphalotheca C.G. Ehrenberg, 1854
390. Genus Oncosphenia C.G. Ehrenberg, 1845
391. Genus Opephoropsis J. Frenguelli, 1945
392. Genus Orthotropis P.T. Cleve, 1891
393. Genus Oshitea S. Komura, 1993 †
394. Genus Palaeotrigonium A.G. Vologdin, 1962 †
395. Genus Paleohorstia S.Blanco & C.E.Wetzel, 2016
396. Genus Paleopandorus S. Komura, 1996 †
397. Genus Paltonophora F.T. Kützing, 1833
398. Genus Pantocsekia A. Grunow ex J. Pantocsek, 1886 †
399. Genus Pappia M. Hajos in M. Hajos & Z. Rehakova, 1974
400. Genus Paradesmus A.C.J. Corda, 1835
401. Genus Paraszechenyia S.Blanco & C.E.Wetzel, 2016
402. Genus Parodontella S. Komura, 1999 †
403. Genus Pentapodiscus C.G. Ehrenberg, 1843
404. Genus Peponia R.K. Greville, 1863 †
405. Genus Peragalla F. Schütt, 1895
406. Genus Peragallia F. Schütt, 1895
407. Genus Peragalloella H. Van Heurck, 1909
408. Genus Peristephania C.G. Ehrenberg, 1854
409. Genus Perithyra C.G. Ehrenberg ex H. Van Heurck, 1896
410. Genus Perizonium F. Cohn & C. Janisch ex L. Rabenhorst, 1864
411. Genus Peroniopsis F. Hustedt, 1952
412. Genus Phacodiscus A. Meunier, 1910
413. Genus Phaeothallus K.I.Meyer
414. Genus Phalarina Ehrenberg
415. Genus Phialediscus L. Vailionis, 1930
416. Genus Phlyctaenia F.T. Kützing, 1849
417. Genus Phycorona Blanco, 2020 †
418. Genus Pinnulariosigma T.V. Desikachary, V.N. Raja Rao & V.T. Sridharan in T.V. Desikachary, 1989
419. Genus Playaensis S.A. Spaulding & J.P. Kociolek in S.A. Spaulding, J.P. Kociolek & Davis, D.R., 2002
420. Genus Plegmolobos S. Komura, 2005 †
421. Genus Pleurodesmium F.T. Kützing, 1846
422. Genus Pleurodiscina P.C. Silva, 1970
423. Genus Pleurodiscus J.W. Barker & S.H. Meakin, 1944
424. Genus Pleurosiphonia C.G. Ehrenberg, 1871
425. Genus Pleurostaurum L. Rabenhorst, 1859
426. Genus Plicatodiscus Z.I. Glezer, 1988
427. Genus Ploiaria J. Pantocsek ex Van Heurck, 1896 †
428. Genus Plumosigma T. Nemoto, 1956
429. Genus Plurifenestra S. Komura, 1996 †
430. Genus Podiscus J.W. Bailey, 1844
431. Genus Pododiscus F.T. Kützing, 1844
432. Genus Podosphenia Ehrenberg, 1836
433. Genus Pogoneis F.E. Round & P.W. Basson, 1997
434. Genus Poloniasira I. Kaczmarska & J.M. Ehrman, 2008 †
435. Genus Polyceratium A.F. Castracane, 1886
436. Genus Polygonalium A.G. Vologdin, 1962 †
437. Genus Polymyscos C. Janisch, 1888
438. Genus Pomphodiscus J.W. Barker & S.H. Meakin, 1947 †
439. Genus Ponticella C.G. Ehrenberg, 1873
440. Genus Pontodiscus D.N.Temniskova-Topalova & V.S.Sheshukova-Poretzkaya, 1981 †
441. Genus Poretzkia A.P. Jousé, 1949 †
442. Genus Porocyclia C.G. Ehrenberg, 1848
443. Genus Porodiscus R.K. Greville, 1863 †
444. Genus Porostauros F. Habirshaw, 1877
445. Genus Porosularia B.V. Skvortzov, 1976
446. Genus Potamodiscus J. Gerloff, 1968
447. Genus Praecymatosira N.I. Strelnikova in Dzinoridze, Jousé & Stelnikova, 1979
448. Genus Praeepithemia A.P. Jousé, 1952
449. Genus Praethalassiosiropsis R. Gersonde & D.M. Harwood, 1990 †
450. Genus Pravifusus A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000
451. Genus Pritchardia L. Rabenhorst, 1864
452. Genus Proboscidea T.B.B. Paddock & P.A. Sims, 1980
453. Genus Proboscineis F. Butzin, 1980
454. Genus Prorostaurus C.G. Ehrenberg, 1843
455. Genus Protonema Meneghinini, 1845
456. Genus Psammoparalia
457. Genus Pseudauliscus G. Leuduger-Fortmorel, 1879
458. Genus Pseudoamphiprora (P.T. Cleve) P.T. Cleve, 1894 †
459. Genus Pseudoaulacodiscus V.N. Vekschina, 1961 †
460. Genus Pseudocerataulus J. Pantocsek, 1889
461. Genus Pseudocoscinodiscus A. Grunow in H. Van Heurck, 1883
462. Genus Pseudodictyoneis P.T. Cleve ex J. Pantocsek, 1892
463. Genus Pseudodimerogramma H.-J. Schrader in H.-J. Schrader & J. Fenner, 1976 †
464. Genus Pseudodiploneis A. Schmidt, 1874
465. Genus Pseudohyalodiscus T.F. Kozyrenko & I.V. Makarova, 1997
466. Genus Pseudomastogloia J. Pantocsek, 1905
467. Genus Pseudopyxilla A. Forti, 1909 †
468. Genus Pseudostaurosiropsis E.A. Morales, 2001
469. Genus Pseudostephanodiscus A. Grunow, 1884
470. Genus Pseudosynedra J. Pantocsek ex G. Moesz, 1904
471. Genus Pseudosynedra G. Leuduger-Fortmorel ex C.S. Boyer, 1827
472. Genus Pseudotribrachia S.Blanco & C.E.Wetzel, 2016
473. Genus Psygmatella F.T. Kützing, 1834
474. Genus Pterotheca A. Grunow ex Forti, 1909 †
475. Genus Ptychodiscus E. O'Meara, 1867
476. Genus Pyrgodiscus F. Kitton ex P.T. Cleve, 1885 †
477. Genus Quadrodiscus P. Prema & T.V. Desikachary, 1989
478. Genus Radialiplicata (Z.I. Glezer) Z.I. Glezer, 1992 †
479. Genus Radiodiscus A. Forti & P. Schulz, 1932
480. Genus Radiodiscus (W.M. Bale) Mills, 1932
481. Genus Radiopalma J. Brun, 1891 †
482. Genus Rancia L. Mangin ex J. Chavaillon, 1939
483. Genus Raphidogloea
484. Genus Rattrayella G.B. De Toni, 1889 †
485. Genus Reicheltia H. Van Heurck, 1896
486. Genus Rexlowea J.P. Kociolek & E.W. Thomas, 2010
487. Genus Rhabdium C.F.W. Wallroth, 1833
488. Genus Rhabdosira C.G. Ehrenberg, 1870
489. Genus Rhaphidogloea F.T. Kützing, 1844
490. Genus Rhaphidophoropsis S.Blanco & C.E.Wetzel, 2016
491. Genus Rhaphiophorasphaera B.L. Clark & A.S. Campbell, 1945 †
492. Genus Rhaphococcus C.G. Ehrenberg, 1871
493. Genus Rhipidophora F.T. Kützing, 1844
494. Genus Rhizonotia C.G. Ehrenberg, 1843
495. Genus Rhynchopyxis R. Gersonde & D.M. Harwood, 1990 †
496. Genus Rimaria F.T. Kutzing, 1844
497. Genus Robinsetta G D. Hanna & A.L. Brigger, 1964 †
498. Genus Rosaria Carmichael in W.J. Hooker, 1833
499. Genus Rossiella T.V. Desikachary & C.L. Maheshwari, 1958 †
500. Genus Rouxiopsis S. Komura, 1996 †
501. Genus Rutilariopsis H. Van Heurck, 1896 †
502. Genus Saeptifera R.M.Gogorev, 2014
503. Genus Sagittula S. Komura, 1997
504. Genus Salacia J. Pantocsek, 1889
505. Genus Salpa P. Lefebure, 1947
506. Genus Sameioneis D.J. Russell & R.E. Norris, 1971
507. Genus Sawamuraia S. Komura, 1976 †
508. Genus Scalariella C.Riaux-Gobin, 2012
509. Genus Scalptrum A.C.J. Corda, 1835
510. Genus Scapha Edwards ex C. Johnston, 1860
511. Genus Scaphularia F.T. Kützing, 1844
512. Genus Sceptronema H. Takano, 1983
513. Genus Schimittia P. Lefebure, 1947
514. Genus Schimperiella G. Karsten, 1905
515. Genus Schizonema C.A. Agardh, 1824
516. Genus Schizostauron A. Grunow, 1867
517. Genus Schmidtiella C.H. Ostenfeld, 1903
518. Genus Schuettia G.B. De Toni, 1894
519. Genus Schumanniana P. Lefebure, 1947
520. Genus Scoliodiscus A. Jurilj, 1954
521. Genus Scytellum C.Agardh, 1827
522. Genus Secallia F. Azpeitia, 1911
523. Genus Sembeya P. Lefebure, 1947
524. Genus Semseyia J. Pantocsek, 1902
525. Genus Sextiputeus R. Ross & P.A. Sims, 2000 †
526. Genus Sieminskia D. Metzeltin & H. Lange-Bertalot, 1998
527. Genus Sigma M. Peragallo in J. Heribaud et al., 1920
528. Genus Simonseniella J. Fenner, 1991 †
529. Genus Siphonodiscus S. Komura, 1996 †
530. Genus Skvortzowia M.S.Kulikovskiy, H.Lange-Bertalot & D.Metzeltin, 2012
531. Genus Smithiella H. Peragallo in H. Peragallo & M. Peragallo, 1901
532. Genus Solium P.A.C. Heiberg, 1863 †
533. Genus Spermatogonia G.Leuduger-Fortmorel, 1892
534. Genus Sphaerophora (A.H. Hassall) J. Lindley, 1846
535. Genus Sphaerotermia C.G. Ehrenberg, 1852
536. Genus Sphenoneis V.B.A. Trevisan di San Leon, 1848
537. Genus Sphenophora F.T. Kützing, 1833
538. Genus Sphenophora (Kützing) L. Agassiz, 1843
539. Genus Sphenosira C.G. Ehrenberg, 1843
540. Genus Sphinctocystis A.H. Hassall, 1845
541. Genus Spinivinculum R. Ross, 1990
542. Genus Spinodiscus T.V. Desikachary & K.A. Ranjitha Devi in T.V. Desikachary, 1986 †
543. Genus Spinosira T.F. Kozyrenko & I.V. Makarova, 1997 †
544. Genus Spirodiscina S.Blanco & C.E.Wetzel, 2016
545. Genus Staurogramma L. Rabenhorst, 1853
546. Genus Stauronella C. Mereschkowsky, 1901
547. Genus Staurosigma A. Grunow ex Rabenhorst, 1864
548. Genus Stelladiscus J. Rattray, 1890
549. Genus Stelodiscus S. Komura, 2001 †
550. Genus Stenopterotia F. Habirshaw, 1878
551. Genus Stephanogonia C.G. Ehrenberg, 1844 †
552. Genus Stephanonycites S. Komura, 1999 †
553. Genus Stephanosira C.G. Ehrenberg, 1848
554. Genus Stichochrysis Pringsheim, 1955
555. Genus Stichostaura C.G. Ehrenberg, 1853
556. Genus Stictodesmis R.K. Greville, 1863
557. Genus Stictodiscella G.B. De Toni, 1894
558. Genus Stictoneis F.T. Kützing, 1844
559. Genus Stigmaphora G.C. Wallich, 1860
560. Genus Stoschiella C.Gardner & K.Wenderoth, 1966
561. Genus Streptommion S.Komura, 1997 †
562. Genus Striatocellina Z.I. Glezer, 1988
563. Genus Strombus F. Schütt ex A.F. Castracane, 1892
564. Genus Sturtgrovea O. Kuntze, 1898
565. Genus Sturtiella R. Simonsen & H.-J. Schrader, 1974 †
566. Genus Stylaria Hooker
567. Genus Styloneis C.G. Ehrenberg, 1844
568. Genus Stylorium S. Komura, 1999 †
569. Genus Suriraya E. Pfitzer, 1871
570. Genus Symbolophora C.G. Ehrenberg, 1844
571. Genus Syncyclia C.G. Ehrenberg, 1837
572. Genus Syrinx A.C.J. Corda, 1835
573. Genus Systephania C.G. Ehrenberg, 1844 †
574. Genus Szechenyia J. Pantocsek, 1903
575. Genus Tabulina J. Brun in J. Brun & J. Tempère, 1889 †
576. Genus Temperea M. Peragallo in J. Tempère & H. Peragallo, 1908
577. Genus Temperella F.W. Mills, 1935 †
578. Genus Tessella C.G. Ehrenberg, 1837
579. Genus Tetrachaeta C.G. Ehrenberg, 1844
580. Genus Tetralophus S. Komura, 2007 †
581. Genus Tetramphora C. Mereschkowsky, 1903
582. Genus Tetrapodiscus C.G. Ehrenberg, 1843
583. Genus Thamnodiscus S. Komura, 1999 †
584. Genus Thaumaleorhabdium V.B.A. Trevisan di San Leon, 1848
585. Genus Thaumatonema R.K. Greville, 1863 †
586. Genus Thumia P.T. Cleve ex F.B. Taylor, 1929
587. Genus Tibiella C.E. Bessey, 1900
588. Genus Tortilaria W.J. Barker & S.H. Meakin, 1948
589. Genus Toxosira A. de Brébisson ex M. Peragallo, 1903
590. Genus Triaulacias C.G. Ehrenberg, 1844
591. Genus Tribrachia A. Mann, 1925
592. Genus Triceras Lobarzewski
593. Genus Trifonovia M.S.Kulikovskiy & H.Lange-Bertalot, 2012
594. Genus Tripterion R.W. Holmes, S. Nagasawa & H. Takano, 1993
595. Genus Trisystema S. Komura, 2005 †
596. Genus Trochosira F. Kitton, 1871 †
597. Genus Trochosirella S. Komura, 1996 †
598. Genus Trochosiropsis Z.I. Glezer, 1984
599. Genus Trochus R. Gersonde & D.M. Harwood, 1990 †
600. Genus Tropidosiphonus S. Komura, 1994
601. Genus Truania J. Pantocsek, 1886 †
602. Genus Tryblioptychus N.I. Hendey, 1958
603. Genus Tschestnovia J. Pantocsek, 1889
604. Genus Tubaformis Gombos A. M. Jr., 1983 †
605. Genus Tubularia J. Brun, 1894
606. Genus Tubulariella P.C. Silva, 1970 †
607. Genus Tumulopsis N.I. Hendey, 1982 †
608. Genus Tursiocola R.W. Holmes, S. Nagasawa & H. Takano, 1993
609. Genus Undatodiscus E.G. Lupikina, 1984 †
610. Genus Unguiella S. Komura, 1996 †
611. Genus Upothema J.A. Long, D.P. Fuge & J. Smith, 1946 †
612. Genus Valdiviella A.F.W. Schimper in G. Karsten, 1907
613. Genus Vavia A. Missuna, 1914
614. Genus Veniaminia N.I. Strelnikova, 1997 †
615. Genus Vernadskowia A. Missuna, 1914
616. Genus Vesiculifera A.H. Hassall, 1845
617. Genus Vikingea A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000
618. Genus Vulcanella P.A.Sims & A.D.Mahood, 1998 †
619. Genus Weissflogia C. Janisch, 1888
620. Genus Willemoesia F. Castracane, 1886
621. Genus Williamsella C.L.Graeff, J.P.Kociolek & S.R.Rushforth, 2013
622. Genus Wittia J. Pantocsek, 1889 †
623. Genus Xanthioisthmus I.Suto, 2006 †
624. Genus Xanthiopsis F. Wolle, 1890
625. Genus Xystotheca G D. Hanna, 1932 †
626. Genus Zotheca J. Pantocsek, 1902
627. Genus Arcus A.P. Olshtynskaja, 1978 † accepted as Fossilarcus Blanco, 2020 † (Invalid. Name violates Art. 20.2 of the ICN (Turland 2018).)
628. Genus Aristella F.T. Kützing, 1834
629. Genus Asterosiga accepted as Astrosiga W.S.Kent (Misspelling.)
630. Genus Corona P. Lefebure & E. Chenevière, 1938 † accepted as Phycorona Blanco, 2020 † (Invalid. Name violates Art. 20.2 of the ICN (Turland 2018).)
631. Genus Detonia J. Frenguelli, 1949 accepted as Neodetonia S. Blanco, 2011
632. Genus Diatoma A.P. de Candolle in Lamark & A.P. de Candolle, 1805
633. Genus Disiphonia C.G. Ehrenberg, 1854
634. Genus Doryphora F.T. Kützing, 1844
635. Genus Ehrenbergia A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Ehrenbergiulva A. Witkowski, H. Lange-Bertalot & D. Metzeltin in A. Witkowski & H. Lange-Bertalot, 2004
636. Genus Euphyllodium G. Shadbolt, 1854
637. Genus Falcatella L. Rabenhorst, 1853 accepted as Fragilaria H.C. Lyngbye, 1819 (Synonym)
638. Genus Gaillonella J.B.M. Bory de Saint-Vincent, 1825 accepted as Melosira C.A. Agardh, 1824
639. Genus Gallionella accepted as Gaillionella Bory de Saint-Vincent, 1826 accepted as Gaillonella J.B.M. Bory de Saint-Vincent, 1825 accepted as Melosira C.A. Agardh, 1824
640. Genus Gomphocaloneis F. Meister, 1932 accepted as Climaconeis A. Grunow, 1862 (synonym)
641. Genus Helminthopsis H. Van Heurck, 1896 accepted as Helminthopsidella P.C. Silva, 1970 †
642. Genus Hemiaulus Ehrenberg, 1844 accepted as Eucampia C.G. Ehrenberg, 1839
643. Genus Lyngbyea S.C. Sommerfelt, 1826
644. Genus Miosira K. Krammer, H. Lange-Bertalot & W. Schiller, 1997 † accepted as Alveolophora A.I. Moisseeva & T.L. Nevretdinova, 1990 † (later synonym)
645. Genus Neodiatoma A. Kanitz, 1887
646. Genus Orthosira W. Smith, 1855 accepted as Orthoseira G.H.K. Thwaites, 1848
647. Genus Parelion Schmidt, 1888
648. Genus Periptera C.G. Ehrenberg, 1844
649. Genus Sigmatella F.T. Kützing, 1833 accepted as Nitzschia A.H. Hassall, 1845 (nom. rejic.)
650. Genus Spirodiscus A. Jurilj, 1949 accepted as Spirodiscina S.Blanco & C.E.Wetzel, 2016 (Later homonym of Spirodiscus Ehrenberg 1932.)
651. Genus Symblepharis C.G. Ehrenberg, 1873 (homonym of Symblepharis Mont. (1837))
652. Genus Tessela accepted as Tessella G.Playfair, 1915 accepted as Neotessella B.Y.Jo, J.I.Kim, W.Shin, P.Škaloud & P.Siver, 2016 (Duplicate.)
653. Genus Wrightia E. O'Meara, 1867 (unaccepted > nomen nudum, nom. inval.; later homonym)
654. Genus Actinoclava O. Müller, 1912 † (uncertain > nomen dubium, The type species is a holothurian sclerite misidentified as a diatom (see Reich & Wiese (2010), Cretaceous Research 31: 350-363).)
655. Genus Amphicephalosperma Meunier (uncertain > nomen dubium)
656. Genus Aplotella (Kützing) L. Agassiz, 1843 (uncertain > nomen dubium)
657. Genus Archeopantocsekia Borbas, 1893 (uncertain > nomen dubium)
658. Genus Arthrotoma Corda, 1840 (uncertain > nomen dubium)
659. Genus Bruniella H. Van Heurck, 1896 (uncertain > nomen dubium)
660. Genus Coscinorima N.I. Strelnikova in N.I. Strelnikova & I.V. Makarova, 1999 † (uncertain > nomen dubium)
661. Genus Coxia H. Lange-Bertalot & G. Moser in G. Moser, H. Lange-Bertalot & D. Metze, 1998 accepted as Eileencoxia S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
662. Genus Didymohelix J.W.Griffith (uncertain > nomen dubium)
663. Genus Discoplea C.G. Ehrenberg, 1844 (uncertain > nomen dubium)
664. Genus Encyonemopsis accepted as Encyonopsis K. Krammer, 1997 (uncertain > nomen dubium)
665. Genus Girodella Gaillon ex P.J.F. Turpin, 1827 (uncertain > nomen dubium)
666. Genus Gomphonella L. Rabenhorst, 1853 (uncertain > nomen dubium)
667. Genus Haynaldia J. Pantocsek, 1889 accepted as Haynaldiopsis S.Blanco & C.E.Wetzel, 2016 † (uncertain > unassessed)
668. Genus Hormophora A. Jurilj, 1957 (uncertain, Later Homonym)
669. Genus Nephrodiscus S. Komura, 1996 † (uncertain > nomen dubium)
670. Genus Novilla P.A.C. Heiberg, 1863 (uncertain > nomen dubium)
671. Genus Oncodiscus J.W.Bailey (uncertain, uncertain; no indication that it was formally established)
672. Genus Petitia M. Peragallo in J. Tempère & H. Peragallo, 1909 accepted as Halopetitia S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
673. Genus Pharyngoglossa Corda, 1835 (uncertain > nomen dubium)
674. Genus Pleuroneis P.T. Cleve, 1895 (uncertain > nomen dubium)
675. Genus Porotheca J. Fenner, 1994 accepted as Furtheca S.Blanco & C.E.Wetzel, 2016 † (uncertain > unassessed)
676. Genus Protorhaphoneis B. Kwiecinska & J. Sieminska, 2000 (uncertain > nomen dubium)
677. Genus Pseudo-pleurosigma P.T. Cleve & A. Grunow, 1880 (uncertain > nomen dubium)
678. Genus Pyxidicula N.I. Strelnikova & V.A. Nikolaev, 1986 accepted as Eupyxidicula S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
679. Genus Ralfsia E. O'Meara, 1875 (uncertain > nomen dubium)
680. Genus Rhaphidophora J.A. Long, D.P. Fuge & J. Smith, 1946 accepted as Rhaphidophoropsis S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
681. Genus Schmidtia C. Janisch, 1888 (uncertain, invalid)
682. Genus Scoresbya N.I. Hendey, 1937 accepted as Hendeyscoresbya S.Blanco & C.E.Wetzel, 2016 (uncertain > unassessed)
683. Genus Sellaphoropsis D. Metzeltin & H. Lange-Bertalot, 2002 (uncertain > nomen dubium)
684. Genus Stictolecanon S. Komura, 1999 † (uncertain > nomen dubium)
685. Genus Stylobiblium C.G. Ehrenberg, 1845 † (uncertain > nomen dubium)
686. Genus Vanheurckella J. Pantocsek, 1892 † (uncertain > nomen dubium)
687. Genus Vanhoeffenus H. Heiden & R.W. Kolbe, 1928 (uncertain > nomen dubium)
688. Genus Xanthiopyxis (C.G. Ehrenberg) C.G. Ehrenberg, 1845 † (uncertain > nomen dubium)

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