1. Species Navicula aberantior R.Simonsen, 2012
2. Species Navicula aleksandrae Lange-Bertalot, Bogaczewicz-Adamczak & Witkowski, 2003
3. Species Navicula ammophila Grunow, 1862
4. Species Navicula apiculata Brébisson, 1854
5. Species Navicula applicita Hustedt, 1964
6. Species Navicula arenicola Grunow, 1882
7. Species Navicula avium (Tiffany, Herwig et Sterrenburg in Sterrenburg et al.) Yuhang Li & Kuidong Xu, 2017
8. Species Navicula bouillantensis Metzeltin & Lange-Bertalot, 2007
9. Species Navicula bozenae Lange-Bertalot, Witkowski & Zgrundo, 2003
10. Species Navicula canaliculata Cleve, 1900
11. Species Navicula cancellata Donkin, 1872
12. Species Navicula capitatoradiata Germain, 1981
13. Species Navicula cari Ehrenberg, 1836
14. Species Navicula cefarellii Vouilloud & Guerrero, 2021
15. Species Navicula cholnokyana Foged, 1975
16. Species Navicula cincta (Ehrenberg) Ralfs, 1861
17. Species Navicula compositestriata Jasnitsky
18. Species Navicula congerana Hagelstein, 1939
19. Species Navicula cristata Peragallo, 1921
20. Species Navicula crucifera Grunow, 1876
21. Species Navicula cryophiliforma Witkowski, Riaux-Gobin & Daniszewska-Kowalczyk
22. Species Navicula cryptocephala Kützing, 1844
23. Species Navicula cyprinus (Ehrenberg) Kützing
24. Species Navicula dermochelycola Witkowski, Kociolek & Riaux-Gobin in Riaux-Gobin et al., 2020
25. Species Navicula digitoradiata (Gregory) Ralfs, 1861
26. Species Navicula expleta A.Schmidt, 1874
27. Species Navicula finmarchica (Cleve & Grunow) Cleve, 1895
28. Species Navicula fischeri A.W.F.Schmidt, 1875
29. Species Navicula flanatica Grunow, 1860
30. Species Navicula formicata Krasske, 1939
31. Species Navicula gelida Grunow, 1884
32. Species Navicula gregaria Donkin, 1861
33. Species Navicula grevillei (Agardh) Heiberg, 1863
34. Species Navicula guaynaboensis Hagelstein, 1939
35. Species Navicula guayqueriae Frenguelli, 1934
36. Species Navicula hanseatica Lange-Bertalot & Stachura, 1998
37. Species Navicula heeri Pantocsek
38. Species Navicula hippodontafallax Witkowski & Ch.Li in Witkowski et al., 2016
39. Species Navicula hochstetteri Grunow, 1863
40. Species Navicula incomposita Hagelstein
41. Species Navicula inflexa (Gregory) Ralfs, 1861
42. Species Navicula inutilis Krasske, 1949
43. Species Navicula irminiae A.Witkowski, C.Riaux-Gobin & G.Daniszewska-Kowalczyk, 2010
44. Species Navicula kefvingensis (Ehrenberg) Kützing, 1844
45. Species Navicula kongsfjordensis Stachura et al., 2015
46. Species Navicula kryokonites Cleve
47. Species Navicula lorami Frenguelli, 1936 (1938)
48. Species Navicula maiorpargemina D. Fernández-Moreno, P. Sánchez-Castillo, C. Delgado & S.F.P. Almeida, 2022
49. Species Navicula mannii Hagelstein, 1939
50. Species Navicula meniscus J.Schumann, 1867
51. Species Navicula meulemansii A.Mertens, A.Witkowski & Lange-Bertalot, 2013
52. Species Navicula microcephala Grunow, 1868
53. Species Navicula muzafarovii A.Witkowski & H.Lange-Bertalot, 2012
54. Species Navicula northumbrica Donkin, 1861
55. Species Navicula omearae Gogorev, 2018
56. Species Navicula opima Grunow, 1867
57. Species Navicula ovalis Hilse, 1875
58. Species Navicula palpebralis Brébisson ex W.Smith, 1853
59. Species Navicula parapontica A.Witkowski, M.Kulikovskiy, E.Nevrova & H.Lange-Bertalot, 2010
60. Species Navicula pavillardi Hustedt, 1939
61. Species Navicula pavillardii Hustedt, 1939
62. Species Navicula peroi Gogorev, 2018
63. Species Navicula petrovii E.Nevrova; A.Witkowski, J.P.Kociolek & H.Lange-Bertalot, 2014
64. Species Navicula pinnata Pantocsek, 1889
65. Species Navicula protracta (Grunow) Cleve, 1894
66. Species Navicula pseudannulata Frenguelli, 1941
67. Species Navicula radiosa Kützing, 1844
68. Species Navicula ramosissima (C.Agardh) Cleve, 1895
69. Species Navicula rhynchocephala Kützing, 1844
70. Species Navicula salinicola Hustedt, 1939
71. Species Navicula schroeteri Meister, 1932
72. Species Navicula soluta Frenguelli, 1941
73. Species Navicula subcreta Frenguelli, 1941
74. Species Navicula subrhynchocephala Hustedt, 1935
75. Species Navicula supergregaria Rumrich & H. Lange-Bertalot in U. Rumrich, H. Lange-Bertalot & M. Rumrich, 2000
76. Species Navicula surirellae Zanon 1949
77. Species Navicula transitans Cleve, 1883
78. Species Navicula tsukamotoi (Sterrenburg & Hinz) Yuhang Li et Kuidong Xu in Li et al., 2017
79. Species Navicula veneta Kützing, 1844
80. Species Navicula venetoides S.Blanco, I.Alvarez-Blanco & C.Cejudo-Figueiras, 2012
81. Species Navicula witkowskii Lange-Bertalot, Iserentant & Metzeltin, 1998
82. Species Navicula zeta Cleve, 1895
83. Species Navicula zhengii Witkowski & Ch.Li in Witkowski et al., 2016
84. Species Navicula adonis J.Brun, 1889 accepted as Diploneis adonis (J.Brun) Cleve, 1894 accepted as Navicula adonis var. adonis Brun in Brun & Tempère, 1889
85. Species Navicula aestiva Donkin, 1858 accepted as Diploneis aestiva (Donkin) Cleve, 1894 accepted as Diploneis aestiva var. aestiva (Donkin) Cleve, 1894
86. Species Navicula amphiceros Kützing, 1844 accepted as Navicula rhynchotella Lange-Bertalot, 1993 (synonym)
87. Species Navicula amphioxys Kützing, 1844 accepted as Cymbella amphioxys Cleve, 1894 (basionym)
88. Species Navicula anglica Ralfs, 1861 accepted as Placoneis elginensis (Gregory) E.J.Cox, 1988 accepted as Pinnularia elginensis Gregory, 1856 (synonym)
89. Species Navicula angustata W.Smith, 1853 accepted as Cymbopleura angustata (W.Smith) Krammer, 2003 accepted as Navicula angustata var. angustata W. Smith, 1853
90. Species Navicula antarctica Frenguelli, 1960 (unaccepted > nomen nudum, invalidly published)
91. Species Navicula bacillaris Gregory, 1856 accepted as Caloneis bacillaris (Gregory) Cleve
92. Species Navicula bivittata Pantocsek, 1889 accepted as Caloneis permagna (Bailey) Cleve, 1894 (synonym)
93. Species Navicula bohemica Ehrenberg, 1854 accepted as Anomoeoneis costata (Kützing) Hustedt, 1959 accepted as Navicula costata var. costata Kützing, 1844 (basionym)
94. Species Navicula bombus (Ehrenberg) Kützing, 1849 accepted as Diploneis bombus (Ehrenberg) Ehrenberg, 1853 (synonym)
95. Species Navicula brebissonii Kützing, 1844 accepted as Pinnularia acutobrebissonii Kulikovskiy, Lange-Bertalot & Metzeltin, 2010 (synonym)
96. Species Navicula brevis Gregory, 1857 accepted as Caloneis brevis (Gregory) Cleve, 1894 (synonym)
97. Species Navicula bulnheimii Grunow, 1880 accepted as Proschkinia bulnheimii (Grunow) Karayeva, 1978 accepted as Navicula bulnheimii var. bulnheimii Grunow, 1880 (Synonym)
98. Species Navicula capitata Ehrenberg, 1838 accepted as Hippodonta capitata (Ehrenberg) Lange-Bertalot, Metzeltin & Witkowski, 1996
99. Species Navicula clamans Hustedt, 1939 accepted as Chamaepinnularia clamans (Hustedt) Witkowski, Lange-Bertalot & D.Metzeltin, 2000 accepted as Navicula clamans var. clamans Hustedt, 1939 (synonym)
100. Species Navicula clavata Gregory, 1856 accepted as Lyrella clavata (Gregory) D.G.Mann, 1990 (synonym)
101. Species Navicula claviculus Gregory, 1857 accepted as Pinnularia claviculus (Gregory) Rabenhorst, 1864 (synonym)
102. Species Navicula clementis Grunow, 1882 accepted as Placoneis clementis (Grunow) E.J.Cox, 1987
103. Species Navicula coffaeiformis A.W.F.Schmidt, 1874 accepted as Diploneis coffeiformis (Schmidt) Cleve, 1894 (basionym)
104. Species Navicula constans Hustedt, 1944 accepted as Placoneis constans (Hustedt) E.J. Cox, 2003 accepted as Navicula constans var. constans Hustedt, 1944
105. Species Navicula costata Kützing, 1844 accepted as Anomoeoneis costata (Kützing) Hustedt, 1959 accepted as Navicula costata var. costata Kützing, 1844 (synonym)
106. Species Navicula crucicula (W.Smith) Donkin, 1871 accepted as Parlibellus cruciculus (W.Smith) Witkowski, Lange-Bertalot & Metzeltin, 2000 accepted as Parlibellus crucicula (W. Smith) A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Stauroneis crucicula W.Smith, 1853 (synonym)
107. Species Navicula cruciformis Donkin, 1861 accepted as Pinnularia cruciformis (Donkin) Cleve, 1895
108. Species Navicula crucigera (W.Smith) Cleve, 1894 accepted as Haslea crucigera (W.Smith) Simonsen, 1974 accepted as Schizonema cruciger f. cruciger W. Smith, 1856 (synonym)
109. Species Navicula cuspidata (Kutzing) Kutzing, 1844 accepted as Craticula cuspidata (Kutzing) D.G.Mann, 1990 accepted as Frustulia cuspidata Kutzing, 1833 (synonym)
110. Species Navicula densestriata Hustedt, 1922 accepted as Achnanthes petersenii Hustedt, 1937 (synonym)
111. Species Navicula derasa Grunow, 1880 accepted as Navicula transitans var. derasa (Grunow) Cleve, 1883 (basionym)
112. Species Navicula disterta Hustedt accepted as Navicula perminuta Grunow, 1880
113. Species Navicula elegans W.Smith, 1853 accepted as Pinnularia elegans (W.Smith) K.Krammer, 1992 accepted as Navicula elegans f. elegans W. Smith, 1853 (Basionym)
114. Species Navicula expansa Hagelstein, 1939 accepted as Navicula zeta Cleve, 1895 (synonym)
115. Species Navicula falaisiensis Grunow, 1880 accepted as Cymbella falaisiensis Grunow in Van Heurck, 1880 accepted as Cymbella falaisensis (Grunow) Krammer & Lange-Bertalot, 1985 accepted as Navicula falaisensis f. falaisensis Grunow in Van Heurck, 1880 accepted as Encyonopsis falaisensis (Grunow) Krammer, 1997 (basionym)
116. Species Navicula forcipata Greville, 1859 accepted as Fallacia forcipata (Greville) Stickle & Mann, 1990 accepted as Navicula forcipata f. forcipata Greville, 1859 (synonym)
117. Species Navicula formosa Gregory, 1856 accepted as Caloneis westii (W.Smith) Hendey, 1964 (Synonym)
118. Species Navicula fusca (Gregory) Ralfs, 1861 accepted as Diploneis fusca (W.Gregory) Cleve, 1894 accepted as Navicula smithii var. fusca Gregory, 1857 (synonym)
119. Species Navicula halophila (Grunow) Cleve, 1894 accepted as Craticula halophila (Grunow) D.G.Mann, 1990 accepted as Navicula cuspidata var. halophila Grunow, 1885 (synonym)
120. Species Navicula hippocampus Ehrenberg, 1838 accepted as Gyrosigma attenuatum (Kützing) Rabenhorst, 1853 (synonym)
121. Species Navicula howeana Hagelstein, 1939 accepted as Haslea howeana (Hagelstein) Giffen, 1980 (synonym)
122. Species Navicula humerosa Brébisson ex W. Smith, 1856 accepted as Petroneis humerosa (Brébisson ex W.Smith) A.J.Stickle & D.G.Mann, 1990 accepted as Navicula humerosa f. humerosa Brébisson ex W. Smith, 1856 (Basionym)
123. Species Navicula hungarica Grunow, 1860 accepted as Hippodonta hungarica (Grunow) Lange-Bertalot, Metzeltin & Witkowski, 1996 accepted as Navicula hungarica f. hungarica Grunow, 1860 (basionym)
124. Species Navicula incerta Grunow, 1880 accepted as Navicula salinicola Hustedt, 1939 (synonym)
125. Species Navicula integra (W.Smith) Ralfs, 1861 accepted as Prestauroneis integra (W.Smith) K.Bruder, 2008 accepted as Pinnularia integra W.Smith, 1856 (synonym)
126. Species Navicula interrupta Kützing, 1844 accepted as Diploneis interrupta (Kützing) Cleve, 1894 accepted as Navicula interrupta var. interrupta Kützing, 1844 (basionym)
127. Species Navicula jamalinensis Cleve, 1880 accepted as Austariella jamalinensis (Cleve) Witkowski, Lange-Bertalot & Metzeltin, 2000 accepted as Navicula jamalinensis var. jamalinensis Cleve in Cleve & Grunow, 1880 (synonym)
128. Species Navicula jelineckii Grunow, 1863 accepted as
129. Species Navicula krookii Grunow, 1882 accepted as Navicula krockii Grunow, 1882 (misspelling)
130. Species Navicula latefasciata Grunow accepted as Caloneis latefasciata (Grunow) Cleve, 1894 accepted as Navicula latefasciata var. latefasciata Grunow in Cleve & Grunow, 1880
131. Species Navicula latissima Gregory, 1856 accepted as Petroneis latissima (Gregory) A.J.Stickle & D.G.Mann, 1990 accepted as Navicula latissima f. latissima Gregory, 1856 (Basionym)
132. Species Navicula lauriensis J.Frenguelli & H.A.Orlando, 1958 (unaccepted > nomen nudum, invalidly published)
133. Species Navicula liber W.Smith, 1853 accepted as Caloneis liber (W.Smith) Cleve, 1894 (Synonym)
134. Species Navicula lineata Donkin, 1858 accepted as Diploneis lineata (Donkin) Cleve, 1894 accepted as Navicula lineata var. lineata Donkin, 1858
135. Species Navicula lundstroemii Cleve, 1880 accepted as Cosmioneis lundstroemii (Cleve) D.G.Mann, 1990 accepted as Navicula lundstroemii var. lundstroemii Cleve in Cleve & Grunow, 1880 (basionym)
136. Species Navicula lyroides Hendey, 1958 accepted as Lyrella lyroides (Hendey) D.G.Mann, 1990 accepted as Navicula lyroides f. lyroides Hendey, 1958 (synonym)
137. Species Navicula marina Ralfs, 1861 accepted as Petroneis marina (Ralfs) D.G.Mann, 1990 accepted as Navicula marina var. marina Ralfs in Pritchard, 1861 (Basionym)
138. Species Navicula maxima Gregory, 1855 accepted as Caloneis liber (W.Smith) Cleve, 1894
139. Species Navicula minuscula Grunow, 1880 accepted as Adlafia minuscula (Grunow) Lange-Bertalot, 1999 (synonym)
140. Species Navicula miramaris Frenguelli, 1930 accepted as Navicula cefarellii Vouilloud & Guerrero, 2021 (Homonym, illegitimate name)
141. Species Navicula monilifera Cleve, 1895 accepted as Petroneis monilifera (Cleve) A.J.Stickle & D.G.Mann, 1990 accepted as Navicula monilifera f. monilifera Cleve, 1895 (synonym)
142. Species Navicula norae Metzeltin, Lange-Bertalot & García-Rodríguez, 2005 accepted as Seminavis norae (Metzeltin, Lange-Bertalot & García-Rodriguez) D.M. Talgatti & L.C. Torgan, 2017 (unaccepted > superseded combination)
143. Species Navicula oestrupi P.Schulz, 1926 accepted as Hippodonta linearis (Østrup) Lange-Bertalot, Metzeltin & Witkowski, 1996 accepted as Navicula hungarica var. linearis Østrup, 1910
144. Species Navicula ostrearia Turpin, 1827 accepted as Haslea ostrearia (Gaillon) Simonsen, 1974 accepted as Vibrio ostrearius Gaillon, 1820
145. Species Navicula ovum-paschale A.Schmidt, 1875 accepted as Mastogloia ovum-paschale (A.Schmidt) A.Mann, 1925 (synonym)
146. Species Navicula permagna (Bailey) A.M.Edwards, 1859 accepted as Caloneis permagna (Bailey) Cleve, 1894 (synonym)
147. Species Navicula phoenicenteron (Nitzsch) Ehrenberg, 1836 accepted as Stauroneis phoenicenteron (Nitzsch) Ehrenberg, 1843 (synonym)
148. Species Navicula pinnularia Cleve, 1868 accepted as Pinnularia quadratarea (A.Schmidt) Cleve, 1895
149. Species Navicula powelli F.W.Lewis, 1861 accepted as Oestrupia powellii (Lewis) Heiden ex Hustedt, 1935 (synonym)
150. Species Navicula pumila Grunow, 1880 accepted as Navicula cryptocephala var. veneta (Kützing) Rabenhorst, 1864 (synonym)
151. Species Navicula pusilla W.Smith, 1853 accepted as Cosmioneis pusilla (W.Smith) D.G.Mann & A.J.Stickle, 1990 accepted as Navicula pusilla f. pusilla W. Smith, 1853 (basionym)
152. Species Navicula quadratarea A.Schmidt, 1874 accepted as Pinnularia quadratarea (A.Schmidt) Cleve, 1895
153. Species Navicula retusa Brébisson, 1883 accepted as Biremis ambigua (Cleve) D.G.Mann, 1990 accepted as Pinnularia ambigua var. ambigua Cleve, 1895 (synonym)
154. Species Navicula rhomboides Ehrenberg, 1843 accepted as Frustulia rhomboides (Ehrenberg) De Toni, 1891 (basionym)
155. Species Navicula sculpta Ehrenberg, 1854 accepted as Anomoeoneis sphaerophora var. sculpta (Ehrenberg) O.Müller, 1900 (synonym)
156. Species Navicula serena Frenguelli, 1941 accepted as Witkowskia serena (Frenguelli) Kulikovskiy, Glushchenko, Mironov & Kociolek, 2024 (synonym)
157. Species Navicula smithii Brébisson, 1856 accepted as Diploneis smithii (Brébisson) Cleve, 1894 accepted as Navicula smithii f. smithii Brébisson in W. Smith, 1856 (synonym)
158. Species Navicula spicula (Hickie) Cleve, 1894 accepted as Haslea spicula (Hickie) L.Bukhtiyarova, 1995 accepted as Stauroneis spicula Cleve & Grunow, 1880 (Synonym)
159. Species Navicula splendida Gregory, 1856 accepted as Diploneis splendida Cleve, 1894 accepted as Navicula splendida var. splendida Gregory, 1856
160. Species Navicula subsalina Donkin, 1870 accepted as Caloneis amphisbaena var. subsalina (Donkin) Cleve, 1894 (synonym)
161. Species Navicula subula Grunow, 1860 accepted as (synonym)
162. Species Navicula sulphurea J.Frenguelli & H.A.Orlando, 1958 (unaccepted > nomen nudum, invalidly published)
163. Species Navicula trevelyana Donkin, 1861 accepted as Pinnularia trevelyana (Donkin) Rabenhorst, 1864
164. Species Navicula trompii Cleve, 1901 accepted as Haslea trompii (Cleve) Simonsen, 1974 accepted as Navicula trompii var. trompii Cleve, 1900
165. Species Navicula tuscula (Ehrenberg) Grunow accepted as Aneumastus tuscula (Ehrenberg) D.G.Mann & A.J.Stickle, 1990 † accepted as Navicula tuscula f. tuscula Ehrenberg, 1840 (synonym)
166. Species Navicula weissflogi A. Schmidt, 1873 accepted as Navicula weissflogii A.W.F.Schmidt, 1873
167. Species Navicula yarrensis Grunow, 1876 accepted as Pinnunavis yarrensis (Grunow) H.Okuno, 1975 accepted as Navicula yarrensis var. yarrensis Grunow in Schmidt et al., 1876 (synonym)
168. Species Navicula wawrikae Hustedt, 1961 represented as Haslea wawrikae (Hustedt) Simonsen, 1974 (Homotypic Synonym)
169. Species Navicula aberrans Cleve-Euler, 1953 (uncertain > unassessed)
170. Species Navicula abscondita Hustedt, 1939 (uncertain > unassessed)
171. Species Navicula abunda Hustedt, 1955 (uncertain > unassessed)
172. Species Navicula acephala Schoeman, 1973 (uncertain > unassessed)
173. Species Navicula adhaerens Mereschkovsky, 1901 (uncertain > unassessed)
174. Species Navicula adriatica Grunow, 1860 (uncertain > unassessed)
175. Species Navicula aestuarii Brébisson ex Kützing, 1849 (uncertain > unassessed)
176. Species Navicula agnita Hustedt, 1955 (uncertain > unassessed)
177. Species Navicula agnita Hustedt, 1966 (uncertain > unassessed)
178. Species Navicula alata Ehrenberg, 1840 accepted as Entomoneis alata (Ehrenberg) Ehrenberg, 1845 (uncertain > unassessed, homotypic synonym)
179. Species Navicula albinensis Grunow, 1884 (uncertain > unassessed)
180. Species Navicula alpha Cleve, 1893 (uncertain > unassessed)
181. Species Navicula amphisbaena Bory de Saint Vincent, 1824 (uncertain > unassessed)
182. Species Navicula ancilla Hendey, 1964 (uncertain > unassessed)
183. Species Navicula angulata Quekett, 1848 (uncertain > unassessed)
184. Species Navicula applicitoides Hustedt, 1964 (uncertain > unassessed)
185. Species Navicula apposita Hustedt, 1954 (uncertain > unassessed)
186. Species Navicula arenaria Donkin, 1861 (uncertain > unassessed)
187. Species Navicula atwateri Seddon, Witkowski & Hemphill-Haley, 2011 (uncertain > unassessed)
188. Species Navicula australoceanica A.Witkowski, C.Riaux-Gobin & G.Daniszewska-Kowalczyk, 2010 (uncertain > unassessed)
189. Species Navicula bacillifera Pantocsek, 1889 (uncertain > unassessed)
190. Species Navicula bakiana A.Witkowski & Lange-Bertalot, 2009 (uncertain > unassessed)
191. Species Navicula baltica Ehrenberg, 1838 (uncertain > unassessed)
192. Species Navicula besarensis Giffen, 1980 (uncertain > unassessed)
193. Species Navicula bifrons Ehrenberg, 1833 (uncertain > unassessed)
194. Species Navicula bomboides A.W.F.Schmidt, 1874 (uncertain > unassessed)
195. Species Navicula bossvikensis S. Busse & P. Snoeijs, 2002 (uncertain > unassessed)
196. Species Navicula bottnica Grunow, 1880 (uncertain > unassessed)
197. Species Navicula bourrellyivera Lange-Bertalot, A.Witkowski & K.Stachura, 1998 (uncertain > unassessed)
198. Species Navicula britannica Hustedt & Aleem, 1951 (uncertain > unassessed)
199. Species Navicula brygidae Lange-Bertalot, A.Witkowski & J.P.Kociolek, 2009 (uncertain > unassessed)
200. Species Navicula caeca Mann, 1925 (uncertain > unassessed)
201. Species Navicula calida Hendey, 1964 (uncertain > unassessed)
202. Species Navicula campbellii M.Peragallo, 1908 (uncertain > unassessed)
203. Species Navicula carlae A.Witkowski, Lange-Bertalot & J.P.Kociolek, 2009 (uncertain > unassessed)
204. Species Navicula centraster Cleve, 1895 (uncertain > unassessed)
205. Species Navicula challengeri Grunow, 1880 (uncertain > unassessed)
206. Species Navicula cinctaeformis Hustedt in Schmidt et al., 1936 (uncertain > unassessed)
207. Species Navicula concordia C.Riaux-Gobin & A.Witkowski, 2010 (uncertain > unassessed)
208. Species Navicula crassa Gregory, 1855 (uncertain > unassessed)
209. Species Navicula creuzburgensis Krasske, 1927 (uncertain > unassessed)
210. Species Navicula criophila (Castracane) De Toni, 1891 accepted as Pinnularia criophila Castracane, 1886 (uncertain > unassessed)
211. Species Navicula criophiliforma A.Witkowski, C.Riaux-Gobin & G.Daniszewska-Kowalczyk, 2010 (uncertain > unassessed)
212. Species Navicula cruciata Leuduger-Fortmorel, 1879 (uncertain > unassessed)
213. Species Navicula cruciculoides C.Brockmann, 1950 (uncertain > unassessed)
214. Species Navicula cunoniae Cholnoky, 1963 (uncertain > unassessed)
215. Species Navicula darwiniana Seddon & Witkowski, 2011 (uncertain > unassessed)
216. Species Navicula delawarensis Grunow ex Cleve, 1893 (uncertain > unassessed)
217. Species Navicula delicatula Cleve, 1894 accepted as Climaconeis delicatula (Cleve) E.J.Cox, 1982 (uncertain > unassessed, homotypic synonym)
218. Species Navicula delognei Van Heurck, 1880 (uncertain > unassessed)
219. Species Navicula densistriata (Schmidt) Hanna & Grant, 1926 accepted as Navicula gemina var. densestriata A.W.F.Schmidt, 1875 (uncertain > unassessed)
220. Species Navicula didyma Ehrenberg, 1840 accepted as Pinnularia didyma Ehrenberg, 1844 (uncertain > unassessed)
221. Species Navicula digitoconvergens Lange-Bertalot, 1999 (uncertain > unassessed)
222. Species Navicula dimidiata A.Mayer, 1919 (uncertain > unassessed)
223. Species Navicula directa (W.Smith) Ralfs, 1861 accepted as Pinnularia directa var. directa W. Smith, 1853 (uncertain > unassessed)
224. Species Navicula diserta Hustedt, 1939 (uncertain > unassessed)
225. Species Navicula distans (W.Smith) Ralfs, 1861 accepted as Pinnularia distans W.Smith, 1853 (uncertain > unassessed)
226. Species Navicula distantepunctata Simonsen, 1974 (uncertain > unassessed)
227. Species Navicula duerrenbergiana Hustedt, 1934 accepted as Haslea duerrenbergiana (Hustedt) Sterrenburg in Sterrenburg et al., 2015 (uncertain > unassessed)
228. Species Navicula dulcis Patrick, 1959 (uncertain > unassessed)
229. Species Navicula eidrigiana J.R.Carter, 1979 (uncertain > unassessed)
230. Species Navicula elegantoides Hustedt, 1942 accepted as Pinnunavis elegantoides (Hustedt) Cocquyt & Olodo in Cocquyt et al., 2018 (uncertain > unassessed, homotypic synonym)
231. Species Navicula elliptica W.Smith, 1853 (uncertain > unassessed)
232. Species Navicula epsilon Cleve, 1893 (uncertain > unassessed)
233. Species Navicula erifuga Lange-Bertalot, 1985 (uncertain > unassessed)
234. Species Navicula escorialis R.Simonsen, 1959 (uncertain > unassessed)
235. Species Navicula fabiformis A.Witkowski, C.Riaux-Gobin & G.Daniszewska-Kowalczyk, 2010 (uncertain > unassessed)
236. Species Navicula famelica Castracane, 1889 (uncertain > unassessed)
237. Species Navicula fastuosa Ehrenberg, 1840 (uncertain > unassessed)
238. Species Navicula fujianensis Chin & Cheng, 1979 (uncertain > unassessed)
239. Species Navicula fundata Hustedt, 1964 accepted as Lyrella fundata (Hustedt) Siqueiros Beltrones in Siqueiros Beltrones et al., 2020 (uncertain > unassessed, homotypic synonym)
240. Species Navicula fusiformis Grunow, 1877 accepted as Haslea fusiformis (Grunow) Lobban & C.O.Perez in Lobban et al., 2020 (uncertain > unassessed, synonym)
241. Species Navicula fusioides Grunow, 1880 (uncertain > unassessed)
242. Species Navicula gaillonii Bory de Saint-Vincent, 1824 (uncertain > unassessed)
243. Species Navicula galapagoensis Seddon & Witkowski, 2011 (uncertain > unassessed)
244. Species Navicula gemina A. Schmidt, 1875 (uncertain > unassessed)
245. Species Navicula genestoermeri A.Witkowski, H-Lange-Bertalot & J.P.Kociolek, 2009 (uncertain > unassessed)
246. Species Navicula genuflexa Kützing, 1844 (uncertain > unassessed)
247. Species Navicula germanopolonica Witkowski & Lange-Bertalot, 1993 (uncertain > unassessed)
248. Species Navicula gieniaflorentina A.Witkowski, Lange-Bertalot, A.Brzeziska & J.P.Kociolek, 2009 (uncertain > unassessed)
249. Species Navicula giffeniana Foged, 1975 (uncertain > unassessed)
250. Species Navicula gigantea Hustedt, 1961 (uncertain > unassessed)
251. Species Navicula glaciei Van Heurck, 1909 (uncertain > unassessed)
252. Species Navicula glans Ehrenberg, 1838 (uncertain > unassessed)
253. Species Navicula granulata Bailey, 1854 (uncertain > unassessed)
254. Species Navicula granulata Ehrenberg, 1836 (uncertain > unassessed)
255. Species Navicula granulata Brébisson in Gregory, 1855 (uncertain > unassessed)
256. Species Navicula gravistriata R.M.Patrick, 1959 (uncertain > unassessed)
257. Species Navicula gregalis Cholnoky, 1963 (uncertain > unassessed)
258. Species Navicula gregorii O'Meara, 1875 (uncertain > unassessed)
259. Species Navicula hanseni Möller, 1950 (uncertain > unassessed)
260. Species Navicula hennedyi W.Smith, 1856 (uncertain > unassessed)
261. Species Navicula heterovalvata R.Simonsen, 2012 (uncertain > unassessed)
262. Species Navicula heufleri Grunow, 1860 (uncertain > unassessed)
263. Species Navicula higleri A.Witkowski & Lange-Bertalot, 2009 (uncertain > unassessed)
264. Species Navicula holmiensis Cleve, 1881 (uncertain > unassessed)
265. Species Navicula ilopangoensis Hustedt, 1956 (uncertain > unassessed)
266. Species Navicula inattingens R.Simonsen, 1959 (uncertain > unassessed)
267. Species Navicula incertata Lange-Bertalot, 1985 (uncertain > unassessed)
268. Species Navicula incompta Krasske, 1932 (uncertain > unassessed)
269. Species Navicula incongruens Hendey, 1977 (uncertain > unassessed)
270. Species Navicula incurvata Gregory, 1856 (uncertain > unassessed)
271. Species Navicula infirmitata Giffen, 1975 accepted as Olifantiella infirmitata (Giffen) Witkowski & Snoeijs in Kaleli et al., 2018 (uncertain > unassessed)
272. Species Navicula inscriptura Hendey, 1977 (uncertain > unassessed)
273. Species Navicula isabelensiformis Seddon & Witkowski, 2011 (uncertain > unassessed)
274. Species Navicula isabelensiminor Seddon & Witkowski, 2011 (uncertain > unassessed)
275. Species Navicula isabelensis Seddon & Witkowski, 2011 (uncertain > unassessed)
276. Species Navicula isabelensoides Seddon & Witkowski, 2011 (uncertain > unassessed)
277. Species Navicula istriana (Grunow in Van Heurck) Pantocsek, 1902 accepted as Navicula minuscula var. istriana Grunow, 1880 (uncertain > unassessed)
278. Species Navicula jelinekiana Grunow, 1867 (uncertain > unassessed)
279. Species Navicula justa Hustedt, 1955 (uncertain > unassessed)
280. Species Navicula kohlmaieri Lange-Bertalot, 1998 (uncertain > unassessed)
281. Species Navicula kryophila Cleve, 1883 (uncertain > unassessed)
282. Species Navicula lagunae Seddon & Witkowski, 2011 (uncertain > unassessed)
283. Species Navicula lanceolata Ehrenberg, 1838 (uncertain > unassessed)
284. Species Navicula lancettula Schumann, 1867 (uncertain > unassessed)
285. Species Navicula lemkei A.Witkowski, 2009 (uncertain > unassessed)
286. Species Navicula leptocephala Brébisson, 1880 (uncertain > unassessed)
287. Species Navicula lesmonensis Hustedt, 1957 (uncertain > unassessed)
288. Species Navicula lewisiana Greville, 1863 (uncertain > unassessed)
289. Species Navicula libonensis Schoeman, 1970 (uncertain > unassessed)
290. Species Navicula liburnica Grunow, 1860 (uncertain > unassessed)
291. Species Navicula linearis Grunow, 1860 (uncertain > unassessed)
292. Species Navicula litoricola Hustedt, 1955 (uncertain > unassessed)
293. Species Navicula littoralis Donkin, 1871 (uncertain > unassessed)
294. Species Navicula lucens Hustedt, 1942 (uncertain > unassessed)
295. Species Navicula lusoria Giffen, 1975 (uncertain > unassessed)
296. Species Navicula lyra Ehrenberg, 1843 (uncertain > unassessed)
297. Species Navicula maculosa Donkin, 1871 (uncertain > unassessed)
298. Species Navicula margalithii Lange-Bertalot, 1985 (uncertain > unassessed)
299. Species Navicula mauleri Brun, 1891 (uncertain > unassessed)
300. Species Navicula melanocephala Giffen, 1975 (uncertain > unassessed)
301. Species Navicula membranacea Cleve, 1897 (uncertain > unassessed)
302. Species Navicula menaiana Hendey, 1956 (uncertain > unassessed)
303. Species Navicula mendotia VanLandingham, 1975 (uncertain > unassessed)
304. Species Navicula meniscoides Hustedt, 1955 (uncertain > unassessed)
305. Species Navicula microdigitoradiata Lange-Bertalot, 1993 (uncertain > unassessed)
306. Species Navicula minnewaukonensis Elmore, 1921 (uncertain > unassessed)
307. Species Navicula monoculata Hustedt, 1945 (uncertain > unassessed)
308. Species Navicula mormonorum Grunow ex A.Schmidt, 1876 (uncertain > unassessed)
309. Species Navicula muscatinei Reimer & Lee, 1986 (uncertain > unassessed)
310. Species Navicula mutica (Kützing) Frenguelli, 1924 accepted as Navicula mutica f. mutica Kützing, 1844 (uncertain > unassessed)
311. Species Navicula neglecta Karsten, 1899 (uncertain > unassessed)
312. Species Navicula nivalis Ehrenberg, 1853 (uncertain > unassessed)
313. Species Navicula normalis Hustedt, 1955 (uncertain > unassessed)
314. Species Navicula normaloides Cholnoky, 1968 (uncertain > unassessed)
315. Species Navicula nyella Hustedt, 1964 (uncertain > unassessed)
316. Species Navicula odiosa Wallace, 1960 (uncertain > unassessed)
317. Species Navicula omega Cleve, 1893 (uncertain > unassessed)
318. Species Navicula orbiculata Patrick, 1959 (uncertain > unassessed)
319. Species Navicula oregonica (Ehrenberg) Kützing, 1849 accepted as Pinnularia oregonica Ehrenberg, 1845 (uncertain > unassessed)
320. Species Navicula orphei Pantocsek, 1905 (uncertain > unassessed)
321. Species Navicula ovulum Schmidt, 1874 (uncertain > unassessed)
322. Species Navicula palestinae Gerloff, Natour & Rivera, 1984 (uncertain > unassessed)
323. Species Navicula papilioarea A.Witkowski, C.Riaux-Gobin & G.Daniszewska-Kowalczyk, 2010 (uncertain > unassessed)
324. Species Navicula papula A.W.F.Schmidt, 1875 (uncertain > unassessed)
325. Species Navicula pelagica Cleve, 1896 (uncertain > unassessed)
326. Species Navicula peregrina (Ehrenberg) Kützing, 1844 (uncertain > unassessed)
327. Species Navicula perminuta Grunow, 1880 (uncertain > unassessed)
328. Species Navicula phyllepta Kützing, 1844 (uncertain > unassessed)
329. Species Navicula phylleptosoma Lange-Bertalot, 1999 (uncertain > unassessed)
330. Species Navicula phylleptosomaformis Seddon & Witkowski, 2011 (uncertain > unassessed)
331. Species Navicula pinna Chin & Cheng, 1979 (uncertain > unassessed)
332. Species Navicula plicata Donkin, 1873 (uncertain > unassessed)
333. Species Navicula polae Heiden, 1903 (uncertain > unassessed)
334. Species Navicula porta-aurata A.Witkowski, H.Lange-Bertalot & M.Bak, 2009 (uncertain > unassessed)
335. Species Navicula praestoeensis M.Møller, 1950 (uncertain > unassessed)
336. Species Navicula praetexta Ehrenberg, 1860 (uncertain > unassessed)
337. Species Navicula pseudagrestis Lund, 1946 (uncertain > unassessed)
338. Species Navicula pseudocrassirostris Hustedt, 1961 (uncertain > unassessed)
339. Species Navicula pseudomembranacea Cleve-Euler, 1952 (uncertain > unassessed)
340. Species Navicula pseudoventralis Hustedt, 1936 (uncertain > unassessed)
341. Species Navicula pullus Hustedt, 1955 (uncertain > unassessed)
342. Species Navicula punctulata W.Smith, 1853 (uncertain > unassessed)
343. Species Navicula pygmaea Kützing, 1849 (uncertain > unassessed)
344. Species Navicula quadrilineata Grunow, 1879 (uncertain > unassessed)
345. Species Navicula quadripedis Cleve-Euler, 1952 (uncertain > unassessed)
346. Species Navicula quincunx Cleve, 1891 (uncertain > unassessed)
347. Species Navicula recens (Lange-Bertalot) Lange-Bertalot, 1985 accepted as Navicula cari var. recens Lange-Bertalot, 1980 (uncertain > unassessed)
348. Species Navicula rectangulata Gregory, 1857 (uncertain > unassessed)
349. Species Navicula retrocurvata J.R.Carter ex R.Ross & P.A.Sims, 1978 (uncertain > unassessed)
350. Species Navicula rhombicula Hustedt, 1962 (uncertain > unassessed)
351. Species Navicula rhynchotella Lange-Bertalot, 1993 (uncertain > unassessed)
352. Species Navicula rusticensis Lobban, 1984 (uncertain > unassessed)
353. Species Navicula sabiniana R.M.Patrick, 1959 (uncertain > unassessed)
354. Species Navicula salina (W.Smith) Schütt, 1896 accepted as Stauroneis salina f. salina W. Smith, 1853 (uncertain > unassessed)
355. Species Navicula salinarum Grunow, 1880 (uncertain > unassessed)
356. Species Navicula sanctaecrucis Østrup, 1913 (uncertain > unassessed)
357. Species Navicula schefterae Lobban, 1986 (uncertain > unassessed)
358. Species Navicula scopulorioides Hustedt, 1961 (uncertain > unassessed, homotypic synonym)
359. Species Navicula septentrionalis (Grunow) Gran, 1908 (uncertain > unassessed)
360. Species Navicula septentrionalis Cleve, 1896 (uncertain > unassessed)
361. Species Navicula serratula Grunow in Schmidt et al., 1875 (uncertain > unassessed)
362. Species Navicula setacea (Kützing) Cleve, 1897 (uncertain > unassessed)
363. Species Navicula sieminskiae Lange-Bertalot & Witkowski, 2001 (uncertain > unassessed)
364. Species Navicula sigmoidea (Nitzsch) Ehrenberg, 1832 (uncertain > unassessed)
365. Species Navicula simulata Manguin, 1942 (uncertain > unassessed)
366. Species Navicula sinensis Ehrenberg, 1847 (uncertain > unassessed)
367. Species Navicula sjoersii S.Busse & P.Snoeijs, 2002 (uncertain > unassessed)
368. Species Navicula slesvicensis Grunow, 1880 (uncertain > unassessed)
369. Species Navicula smithii Brébisson, 1854 (uncertain > unassessed)
370. Species Navicula smithii (C.Agardh) Van Heurck, 1896 (uncertain > unassessed)
371. Species Navicula soodensis Krasske, 1927 (uncertain > unassessed)
372. Species Navicula sovereignae Hustedt, 1955 (uncertain > unassessed)
373. Species Navicula spartinetensis Sullivan & Reimer, 1975 (uncertain > unassessed)
374. Species Navicula speciosa Mann, 1907 (uncertain > unassessed)
375. Species Navicula sphaerophora Ehrenberg, 1843 (uncertain > unassessed)
376. Species Navicula spirans Hustedt, 1934 (uncertain > unassessed)
377. Species Navicula splendida Ehrenberg, 1832 (uncertain > unassessed)
378. Species Navicula stauroneiformis Leuduger-Fortmorel, 1892 (uncertain > unassessed)
379. Species Navicula stauroneiformis Elmore, 1921 (uncertain > unassessed)
380. Species Navicula streckerae Lange-Bertalot & Witkowski, 2000 (uncertain > unassessed)
381. Species Navicula striatula (Turpin) Ehrenberg, 1832 (uncertain > unassessed)
382. Species Navicula stroemii Hustedt, 1931 (uncertain > unassessed)
383. Species Navicula stundlii Hustedt, 1959 (uncertain > unassessed)
384. Species Navicula subbottnica A.Witkowski & Lange-Bertalot, 2009 (uncertain > unassessed)
385. Species Navicula subcarinata (Grunow ex A.Schmidt) Hendey, 1951 (uncertain > unassessed)
386. Species Navicula subforcipata Hustedt, 1964 (uncertain > unassessed)
387. Species Navicula symmetrica Patrick, 1944 (uncertain > unassessed)
388. Species Navicula szlachetkoi A.Witkowski, C.Riaux-Gobin & G.Daniszewska-Kowalczyk, 2010 (uncertain > unassessed)
389. Species Navicula taedens Cholnoky, 1968 (uncertain > unassessed)
390. Species Navicula tairuaensis Foged, 1979 (uncertain > unassessed)
391. Species Navicula thermalis Ehrenberg, 1840 (uncertain > unassessed)
392. Species Navicula towutiensis Cholnoky, 1963 (uncertain > unassessed)
393. Species Navicula tridens Meunier, 1910 (uncertain > unassessed)
394. Species Navicula trinodis W.Smith, 1856 (uncertain > unassessed)
395. Species Navicula triplex VanLandingham, 1975 (uncertain > unassessed)
396. Species Navicula tripunctata (O.F.Müller) Bory de Saint-Vincent, 1822 (uncertain > unassessed)
397. Species Navicula umbonata Ehrenberg, 1837 (uncertain > unassessed)
398. Species Navicula umida Bock, 1963 (uncertain > unassessed)
399. Species Navicula uniseriata Østrup, 1913 (uncertain > unassessed)
400. Species Navicula upsaliensis (Grunow) Peragallo, 1903 (uncertain > unassessed)
401. Species Navicula vandamii Schoeman & Archibald, 1987 (uncertain > unassessed)
402. Species Navicula vaneei Lange-Bertalot, 1998 (uncertain > unassessed)
403. Species Navicula vanhoeffenii Gran, 1897 (uncertain > unassessed)
404. Species Navicula viminoides Giffen, 1975 (uncertain > unassessed)
405. Species Navicula walkeri Patrick & Freese, 1961 (uncertain > unassessed)
406. Species Navicula weissflogii A.W.F.Schmidt, 1873 (uncertain > unassessed)
407. Species Navicula westermannii Ehrenberg, 1835 (uncertain > unassessed)
408. Species Navicula westii W.Smith, 1853 (uncertain > unassessed)
409. Species Navicula wiesneri Lange-Bertalot, 1993 (uncertain > unassessed)
410. Species Navicula williamsonii O'Meara, 1875 (uncertain > unassessed)
411. Species Navicula willisiae Seddon & Witkowski, 2011 (uncertain > unassessed)
412. Species Navicula wuestii R.Simonsen, 1959 (uncertain > unassessed)
413. Species Navicula zohdyi Salah, 1953 (uncertain > unassessed)

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