1. Species Pleurosigma aestuarii (Brébisson ex Kützing) W.Smith, 1853
2. Species Pleurosigma chandolense H.P.Gandhi ex Karthick, 2020
3. Species Pleurosigma chilensis Hustedt & Krasske in Krasske, 1941
4. Species Pleurosigma clevei Grunow, 1880
5. Species Pleurosigma cuspidatum (Cleve) H.Peragallo, 1891
6. Species Pleurosigma decorum W.Smith, 1853
7. Species Pleurosigma delicatulum W.Smith, 1852
8. Species Pleurosigma densestriata H.P.Gandhi, 1967
9. Species Pleurosigma diminutum Grunow, 1880
10. Species Pleurosigma directum Grunow, 1880
11. Species Pleurosigma elongatum W.Smith, 1852
12. Species Pleurosigma eudon
13. Species Pleurosigma fasciolum
14. Species Pleurosigma formosum W.Smith, 1852
15. Species Pleurosigma frenguellianum Sunesen, Sterrenburg & Sar, 2014
16. Species Pleurosigma guarreranum E.A.Sar, F.A.S.Sterrenburg & I.Sunesen, 2013
17. Species Pleurosigma hinzianum Sterrenburg, Sunesen & Sar, 2014
18. Species Pleurosigma intermedium W.Smith, 1853
19. Species Pleurosigma lanceolatum Donkin, 1858
20. Species Pleurosigma longinum W.Smith ex Brightwell, 1859
21. Species Pleurosigma longum Cleve, 1873
22. Species Pleurosigma marinum Donkin, 1858
23. Species Pleurosigma naviculaceum Brébisson, 1854
24. Species Pleurosigma nicobaricum Grunow, 1880
25. Species Pleurosigma normanii Ralfs, 1861
26. Species Pleurosigma pulchrum Grunow, 1860
27. Species Pleurosigma rahlehense G.Reid
28. Species Pleurosigma rhombeum Grunow, 1880
29. Species Pleurosigma rigidum W.Smith, 1853
30. Species Pleurosigma rushdyense G.Reid
31. Species Pleurosigma salinarum (Grunow) Grunow, 1880
32. Species Pleurosigma speciosum W.Smith
33. Species Pleurosigma spenceri (Bailey ex Quekett) W.Smith, 1856
34. Species Pleurosigma spencerii Grunow
35. Species Pleurosigma strigosum W.Smith, 1852
36. Species Pleurosigma stuxbergii Cleve & Grunow, 1880
37. Species Pleurosigma validum Shadbolt, 1854
38. Species Pleurosigma williamsii G.Reid
39. Species Pleurosigma balticum (Ehrenberg) W.Smith, 1852 accepted as Gyrosigma balticum (Ehrenberg) Rabenhorst, 1853 (synonym)
40. Species Pleurosigma brebissonii Grunow, 1880 accepted as Gyrosigma acuminatum var. brebissonii (Grunow) Cleve, 1894 accepted as Pleurosigma brebissonii f. brebissonii Grunow in Cleve & Grunow, 1880 (synonym)
41. Species Pleurosigma compactum Greville, 1857 accepted as Rhoicosigma compactum (Greville) Grunow, 1877 (synonym)
42. Species Pleurosigma distortum W.Smith, 1852 accepted as Gyrosigma distortum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma distortum var. distortum W. Smith, 1852 (synonym)
43. Species Pleurosigma kuetzingii Grunow, 1860 accepted as Gyrosigma acuminatum (Kützing) Rabenhorst, 1853 (synonym)
44. Species Pleurosigma littorale W.Smith, 1852 accepted as Gyrosigma littorale (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma littorale var. littorale W. Smith, 1852 (synonym)
45. Species Pleurosigma nubecula W.Smith, 1853 accepted as Pleurosigma intermedium W.Smith, 1853 (synonym)
46. Species Pleurosigma parkeri Harrison, 1860 accepted as Gyrosigma wormleyi (Sullivant) Boyer, 1922 accepted as Pleurosigma wormleyi W.S.Sullivant, 1859 (synonym)
47. Species Pleurosigma peisonis Grunow, 1860 accepted as Gyrosigma peisonis (Grunow) Hustedt, 1930 accepted as Pleurosigma peisonis var. peisonis Grunow, 1860 (synonym)
48. Species Pleurosigma prolongatum W.Smith, 1852 accepted as Gyrosigma prolongatum (W.Smith) J.W.Griffith & Henfrey, 1856 accepted as Pleurosigma prolongatum var. prolongatum W. Smith, 1852 (synonym)
49. Species Pleurosigma pusillum Grunow, 1880 accepted as Pleurosigma salinarum (Grunow) Grunow, 1880 (synonym)
50. Species Pleurosigma quadratum W.Smith, 1853 accepted as (synonym)
51. Species Pleurosigma scalproides Rabenhorst, 1861 accepted as Gyrosigma scalproides (Rabenhorst) Cleve, 1894 (synonym)
52. Species Pleurosigma staurophorum Grunow, 1880 accepted as Costasigma staurophorum (Grunow) G.Reid, 2012 (synonym)
53. Species Pleurosigma strigilis W.Smith, 1852 accepted as Gyrosigma strigilis (W.Smith) J.W.Griffin & Henfrey, 1856 accepted as Pleurosigma strigilis f. strigilis W. Smith, 1852 (synonym)
54. Species Pleurosigma sulcatum Grunow, 1880 accepted as Gyrosigma fasciola var. sulcatum (Grunow) Cleve, 1894 (synonym)
55. Species Pleurosigma tenuissimum W.Smith, 1853 accepted as Gyrosigma tenuissimum (W.Smith) Griffith & Henfrey, 1856 accepted as Pleurosigma tenuissimum var. tenuissimum W. Smith, 1853 (synonym)
56. Species Pleurosigma transversale W.Smith accepted as Pleurosigma naviculaceum Brébisson, 1854 (synonym)
57. Species Pleurosigma wansbeckii Donkin, 1858 accepted as Gyrosigma wansbeckii (Donkin) Cleve, 1894 (synonym)
58. Species Pleurosigma abruptum H. Peragallo, 1891 (uncertain > unassessed)
59. Species Pleurosigma acuminatum (Kützing) Grunow, 1860 accepted as Frustulia acuminata Kützing, 1833 (uncertain > unassessed)
60. Species Pleurosigma acuminatum sensu W. Smith, 1853 (uncertain > unassessed)
61. Species Pleurosigma acus A.Mann, 1925 (uncertain > unassessed)
62. Species Pleurosigma acutum Norman ex Ralfs, 1861 (uncertain > unassessed)
63. Species Pleurosigma aequatoiale Cleve in Cleve & Moller, 1878 (uncertain > unassessed)
64. Species Pleurosigma affine Grunow, 1880 (uncertain > unassessed)
65. Species Pleurosigma agellus Ralfs (uncertain > unassessed)
66. Species Pleurosigma akbecula Derjugin, 1928 (uncertain > unassessed)
67. Species Pleurosigma amara S.R.Stidolph, 1992 (uncertain > unassessed)
68. Species Pleurosigma americanum (H. Peragallo) Boyer, 1927 accepted as Pleurosigma decorum var. americanum H. Peragallo, 1891 (uncertain > unassessed)
69. Species Pleurosigma angulare Cleve (uncertain > unassessed)
70. Species Pleurosigma angulatum (Queckett) W.Smith, 1852 (uncertain > unassessed)
71. Species Pleurosigma angusticonvexum Hagelstein, 1939 (uncertain > unassessed)
72. Species Pleurosigma angustum Donkin, 1858 (uncertain > unassessed)
73. Species Pleurosigma antarcticum Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
74. Species Pleurosigma antillarum H. Peragallo, 1891 (uncertain > unassessed)
75. Species Pleurosigma apulum (Rabenhorst) Ralfs in Pritchard, 1861 accepted as Gyrosigma apula Rabenhorst, 1853 (uncertain > unassessed)
76. Species Pleurosigma arafurense Castracane, 1886 (uncertain > unassessed)
77. Species Pleurosigma arcticum (Cleve) A.Mann, 1937 (uncertain > unassessed)
78. Species Pleurosigma arcuatum Donkin, 1857 (uncertain > unassessed)
79. Species Pleurosigma asiaticum (Tempère & Brun) H.Peragallo, 1891 accepted as Staurosigma asiaticum Tempère & Brun, 1889 † (uncertain > unassessed)
80. Species Pleurosigma atlanticum Frenguelli, 1928 (uncertain > unassessed)
81. Species Pleurosigma atlanticum Heiden & Kolbe, 1928 (uncertain > unassessed)
82. Species Pleurosigma australe Grunow, 1868 (uncertain > unassessed)
83. Species Pleurosigma australicum Witt, 1873 (uncertain > unassessed)
84. Species Pleurosigma baileyi Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
85. Species Pleurosigma balearicum Cleve & Grunow in Cleve & Moller, 1878 (uncertain > unassessed)
86. Species Pleurosigma balearicum Cleve & Grunow in Rodrígues y Femenías, 1889 (uncertain > unassessed)
87. Species Pleurosigma balticosinense Schwarz, 1874 (uncertain > unassessed)
88. Species Pleurosigma barbadense Grunow, 1880 accepted as Pleurosigma marinum var. barbadense Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
89. Species Pleurosigma bennettii M. Peragallo in Tempère & Peragallo, 1909 (uncertain > unassessed)
90. Species Pleurosigma biharense Pantocsek, 1892 (uncertain > unassessed)
91. Species Pleurosigma bistriatum Schumann, 1867 (uncertain > unassessed)
92. Species Pleurosigma boyeri Keeley, 1925 (uncertain > unassessed)
93. Species Pleurosigma brasiliana Müller-Melchers, 1957 (uncertain > unassessed)
94. Species Pleurosigma brasiliense Zimmermann, 1918 (uncertain > unassessed)
95. Species Pleurosigma brunii Cleve ex H. Peragallo, 1891 (uncertain > unassessed)
96. Species Pleurosigma candidum Schumann, 1867 (uncertain > unassessed)
97. Species Pleurosigma capense Petit, 1876 (uncertain > unassessed)
98. Species Pleurosigma capense Karsten, 1905 (uncertain > unassessed)
99. Species Pleurosigma carinatum Donkin, 1858 (uncertain > unassessed)
100. Species Pleurosigma constrictum Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
101. Species Pleurosigma convexum (Grunow in Cleve & Grunow) H. Peragallo, 1891 accepted as Pleurosigma strigosum var. convexum Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
102. Species Pleurosigma crassum Meister, 1932 (uncertain > unassessed)
103. Species Pleurosigma crookii Inglis, 1881 (uncertain > unassessed)
104. Species Pleurosigma curiosa van den Heuvel in Sterrenburg, 1991 (uncertain > unassessed)
105. Species Pleurosigma curvulum (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Navicula curvula Ehrenberg, 1838 (uncertain > unassessed)
106. Species Pleurosigma cuspidatum Cleve accepted as Pleurosigma lanceolatum var. cuspidatum Cleve, 1881 (uncertain > unassessed)
107. Species Pleurosigma cuspidatum (Rabenhorst) Ralfs in Pritchard, 1861 accepted as Gyrosigma cuspidata Rabenhorst, 1853 (uncertain > unassessed)
108. Species Pleurosigma dalmaticum (Grunow) Grunow in Rodrígues y Femenías, 1889 accepted as Pleurosigma decorum var. dalmatica Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
109. Species Pleurosigma depauperana Manguin in Bourrelly & Manguin, 1952 (uncertain > unassessed)
110. Species Pleurosigma diaphanum (Cleve; Cleve) F.W. Mills, 1934 accepted as Gyrosigma diaphanum Cleve, 1894 (uncertain > unassessed)
111. Species Pleurosigma directumsecundum Karsten, 1905 (uncertain > unassessed)
112. Species Pleurosigma distinguendum Hustedt, 1955 (uncertain > unassessed)
113. Species Pleurosigma diversestriatum Meister, 1934 (1935) (uncertain > unassessed)
114. Species Pleurosigma divisa (uncertain > unassessed)
115. Species Pleurosigma dolosum Mann, 1925 (uncertain > unassessed)
116. Species Pleurosigma elegantissimum Castracane, 1886 (uncertain > unassessed)
117. Species Pleurosigma ellipticum M. Peragallo in Tempère & Peragallo, 1913 (uncertain > unassessed)
118. Species Pleurosigma elongatum Auerswald in litt. ed sched. Rabenhorst, 1863 (uncertain > unassessed)
119. Species Pleurosigma excelsum Meister, 1937 (uncertain > unassessed)
120. Species Pleurosigma exemptum A.Mann, 1925 (uncertain > unassessed)
121. Species Pleurosigma eximium (Thwaites) Grunow, 1880 accepted as Schizonema eximium Thwaites, 1848 (uncertain > unassessed)
122. Species Pleurosigma exsul Cleve, 1894 (uncertain > unassessed)
123. Species Pleurosigma falcatum Donkin, 1861 (uncertain > unassessed)
124. Species Pleurosigma fallax Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
125. Species Pleurosigma falx Mann, 1925 (uncertain > unassessed)
126. Species Pleurosigma febigeri Grunow in Cleve & Möller, 1879 (uncertain > unassessed)
127. Species Pleurosigma finmarchicum Cleve in Cleve & Moller, 1882 (uncertain > unassessed)
128. Species Pleurosigma fissa Jurilj, 1957 (uncertain > unassessed)
129. Species Pleurosigma fluviatile Bening, 1928 (uncertain > unassessed)
130. Species Pleurosigma fluviicygnorum J.John, 1983 (uncertain > unassessed)
131. Species Pleurosigma fossile (uncertain > unassessed)
132. Species Pleurosigma frigidum Mann, 1937 (uncertain > unassessed)
133. Species Pleurosigma galapagense (uncertain > unassessed)
134. Species Pleurosigma gallicum (Grunow in Van Heurck) H. Peragallo, 1891 accepted as Pleurosigma scalprum var. gallicum Grunow in Van Heurck, 1880-1885 (uncertain > unassessed)
135. Species Pleurosigma giganteum Grunow, 1880 (uncertain > unassessed)
136. Species Pleurosigma glaciale Cleve, 1883 (uncertain > unassessed)
137. Species Pleurosigma glacicolum Simonsen, 1992 (uncertain > unassessed)
138. Species Pleurosigma gracile Hustedt, 1955 (uncertain > unassessed)
139. Species Pleurosigma gracilentum Rabenhorst, 1861 (uncertain > unassessed)
140. Species Pleurosigma gracilescens Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
141. Species Pleurosigma gracillimum Meister, 1932 (uncertain > unassessed)
142. Species Pleurosigma grovesii Cleve ex H. Peragallo, 1891 (uncertain > unassessed)
143. Species Pleurosigma gruendleri Grunow, 1880 (uncertain > unassessed)
144. Species Pleurosigma hamuliferum Brun, 1889 (uncertain > unassessed)
145. Species Pleurosigma hassali (uncertain > unassessed)
146. Species Pleurosigma heros Cleve, 1894 (uncertain > unassessed)
147. Species Pleurosigma hibericum De Toni, 1891 (uncertain > unassessed)
148. Species Pleurosigma hungaricum Cleve & Brun in Brun & Tempère, 1889 (uncertain > unassessed)
149. Species Pleurosigma hyalinum Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
150. Species Pleurosigma hyperborea (Grunow in Cleve & Grunow) H. Peragallo, 1891 accepted as Pleurosigma tenuissimum var. hyperborea Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
151. Species Pleurosigma ibericum H. Peragallo, 1891 (uncertain > unassessed)
152. Species Pleurosigma incertum (H. Peragallo) Cleve, 1894 accepted as Rhoicosigma incertum H.Peragallo, 1891 (uncertain > unassessed)
153. Species Pleurosigma incertum Forti in Tempère & Peragallo, 1914 (uncertain > unassessed)
154. Species Pleurosigma indicum Simonsen, 1974 (uncertain > unassessed)
155. Species Pleurosigma inflatum Shadbolt, 1854 (uncertain > unassessed)
156. Species Pleurosigma inscriptura M.A.Harper, 2009 (uncertain > unassessed)
157. Species Pleurosigma italicum H. Peragallo, 1891 (uncertain > unassessed)
158. Species Pleurosigma itaparicanum Zimmermann, 1918 (uncertain > unassessed)
159. Species Pleurosigma itium Ricard, 1975 (uncertain > unassessed)
160. Species Pleurosigma japonicum Castracane, 1886 (uncertain > unassessed)
161. Species Pleurosigma javanicum H. Peragallo, 1891 (uncertain > unassessed)
162. Species Pleurosigma karianum Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
163. Species Pleurosigma karstenii Taylor, 1967 (uncertain > unassessed)
164. Species Pleurosigma kerguelense (uncertain > unassessed)
165. Species Pleurosigma kjellmani (uncertain > unassessed)
166. Species Pleurosigma kjellmanii Cleve in Cleve & Grunow, 1880 (uncertain > unassessed)
167. Species Pleurosigma kochii Pantocsek, 1892 (uncertain > unassessed)
168. Species Pleurosigma kowiense Giffen, 1970 (uncertain > unassessed)
169. Species Pleurosigma lacustre W.Smith, 1852 (uncertain > unassessed)
170. Species Pleurosigma lamprocampum (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Navicula lamprocampa Ehrenberg, 1840 (uncertain > unassessed)
171. Species Pleurosigma latiusculum H. Peragallo, 1891 (uncertain > unassessed)
172. Species Pleurosigma latum Cleve, 1880 (uncertain > unassessed)
173. Species Pleurosigma lineare Grunow in Cleve & Möller, 1879 (uncertain > unassessed)
174. Species Pleurosigma longina W. Smith ex Brightwell, 1859 (uncertain > unassessed)
175. Species Pleurosigma longissimum Cleve, 1881 (uncertain > unassessed)
176. Species Pleurosigma longitudinale Mann, 1937 (uncertain > unassessed)
177. Species Pleurosigma lorenzii Grunow, 1860 (uncertain > unassessed)
178. Species Pleurosigma macilentum H.Peragallo, 1891 (uncertain > unassessed)
179. Species Pleurosigma macrum W.Smith, 1853 (uncertain > unassessed)
180. Species Pleurosigma maeoticum Pantocsek, 1902 (uncertain > unassessed)
181. Species Pleurosigma major Liu & Chin, 1980 (uncertain > unassessed)
182. Species Pleurosigma majus (Grunow) Cleve, 1894 accepted as Pleurosigma speciosum var. majus Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
183. Species Pleurosigma makron Johnston, 1860 (uncertain > unassessed)
184. Species Pleurosigma manni Hanna & Grant, 1926 (uncertain > unassessed)
185. Species Pleurosigma maroccanum (Cleve ex H.Peragallo) Cleve, 1894 accepted as Rhoicosigma maroccanum Cleve ex H.Peragallo, 1891 (uncertain > unassessed)
186. Species Pleurosigma marylandica (Grunow in Cleve & Grunow) Tempère & Peragallo, 1889-1895 accepted as Pleurosigma affine var. marylandica Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
187. Species Pleurosigma mediterraneum (Cleve in Grunow) (uncertain > unassessed)
188. Species Pleurosigma minutum Donkin, 1858 (uncertain > unassessed)
189. Species Pleurosigma minutum Grunow in Cleve & Möller, 1878 (uncertain > unassessed)
190. Species Pleurosigma mirabile O'Meara, 1872 (uncertain > unassessed)
191. Species Pleurosigma muscicola Krasske, 1948 (uncertain > unassessed)
192. Species Pleurosigma naja Meister, 1935 (uncertain > unassessed)
193. Species Pleurosigma neglectum Karsten, 1899 (uncertain > unassessed)
194. Species Pleurosigma neogradense Pantocsek, 1889 (uncertain > unassessed)
195. Species Pleurosigma nodiferum Grunow, 1880 (uncertain > unassessed)
196. Species Pleurosigma normanii sensu Cleve in Cleve & Grunow, 1880 (uncertain > unassessed)
197. Species Pleurosigma notarisii Castracane, 1865 (uncertain > unassessed)
198. Species Pleurosigma obesum A.Mann, 1925 (uncertain > unassessed)
199. Species Pleurosigma obliquum Grunow, 1880 (uncertain > unassessed)
200. Species Pleurosigma obscurum W.Smith, 1852 (uncertain > unassessed)
201. Species Pleurosigma observatoriensis Simonsen, 1992 (uncertain > unassessed)
202. Species Pleurosigma obtusatum W.S.Sullivant & Wormley, 1859 (uncertain > unassessed)
203. Species Pleurosigma obtusum Mann, 1925 (uncertain > unassessed)
204. Species Pleurosigma oceanicum (H. Peragallo) F.W. Mills, 1934 accepted as Rhoicosigma oceanicum f. oceanicum H. Peragallo, 1891 (uncertain > unassessed)
205. Species Pleurosigma olympian Terry ex Boyer, 1927 (uncertain > unassessed)
206. Species Pleurosigma olympianum Terry ex Tempère & Peragallo, 1909 (uncertain > unassessed)
207. Species Pleurosigma olympianum Terry ex Boyer, 1927 (uncertain > unassessed)
208. Species Pleurosigma o'mearii (Grunow in Cleve & Grunow) H. Peragallo, 1891 (uncertain > unassessed)
209. Species Pleurosigma paradoxum H.Peragallo, 1891 (uncertain > unassessed)
210. Species Pleurosigma parkerii Harrison, 1960 (uncertain > unassessed)
211. Species Pleurosigma pelagicum (H.Peragallo) Cleve, 1894 accepted as Pleurosigma acutum var. pelagicum H. Peragallo manus. ex H. Peragallo, 1891 (uncertain > unassessed)
212. Species Pleurosigma peragalli (uncertain > unassessed)
213. Species Pleurosigma permagnum Meister, 1932 (uncertain > unassessed)
214. Species Pleurosigma perthense J.John, 1983 (uncertain > unassessed)
215. Species Pleurosigma plagiostoma Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
216. Species Pleurosigma planctonicum Cleve-Euler, 1952 (uncertain > unassessed)
217. Species Pleurosigma planctonicum R.Simonsen, 1974 (uncertain > unassessed)
218. Species Pleurosigma planktonica Schrader in Schrader & Fenner, 1976 (uncertain > unassessed)
219. Species Pleurosigma polymorphianum Thum (uncertain > unassessed)
220. Species Pleurosigma portoricense Hagelstein, 1939 (uncertain > unassessed)
221. Species Pleurosigma praelongum Cleve, 1894 (uncertain > unassessed)
222. Species Pleurosigma prisma Mann, 1925 (uncertain > unassessed)
223. Species Pleurosigma pumilum Schumann, 1867 (uncertain > unassessed)
224. Species Pleurosigma quininpiaceii M.Peragallo, 1908 (uncertain > unassessed)
225. Species Pleurosigma rectum Donkin, 1858 (uncertain > unassessed)
226. Species Pleurosigma reticulatum (Norman) Hustedt, 1955 accepted as Donkinia reticulata Ralfs in Pritchard, 1861 (uncertain > unassessed)
227. Species Pleurosigma retusum Zimmermann, 1915 (uncertain > unassessed)
228. Species Pleurosigma reversum Gregory, 1857 (uncertain > unassessed)
229. Species Pleurosigma rhomboides (uncertain > unassessed)
230. Species Pleurosigma rigens Mann, 1925 (uncertain > unassessed)
231. Species Pleurosigma rigidulum Ivanov & Eremenko, 1948 (uncertain > unassessed)
232. Species Pleurosigma rostratum Hustedt, 1955 (uncertain > unassessed)
233. Species Pleurosigma ryderii M. Peragallo in Tempère & Peragallo, 1909 (uncertain > unassessed)
234. Species Pleurosigma sabangi Meister, 1932 (uncertain > unassessed)
235. Species Pleurosigma sagitta (uncertain > unassessed)
236. Species Pleurosigma sardoum Zanon, 1948 (uncertain > unassessed)
237. Species Pleurosigma scalpellum Pritchard (uncertain > unassessed)
238. Species Pleurosigma scalprum sensu Rabenhorst, 1861-1879 (uncertain > unassessed)
239. Species Pleurosigma sciotense Sullivant & Wormley, 1859 (uncertain > unassessed)
240. Species Pleurosigma secundum Karsten, 1905 (uncertain > unassessed)
241. Species Pleurosigma siberica (Grunow) Cardinal, Poulin & Berard-Therriault, 1980 (uncertain > unassessed)
242. Species Pleurosigma signatum Voigt, 1969 (uncertain > unassessed)
243. Species Pleurosigma simile Grunow, 1880 (uncertain > unassessed)
244. Species Pleurosigma simonsenii Hasle, 1990 (uncertain > unassessed)
245. Species Pleurosigma simplex Ricard, 1975 (uncertain > unassessed)
246. Species Pleurosigma simum (Ehrenberg; Ehrenberg) Ralfs in Pritchard, 1861 accepted as Navicula sima Ehrenberg, 1845 (uncertain > unassessed)
247. Species Pleurosigma sinense (uncertain > unassessed)
248. Species Pleurosigma sinensis (Ehrenberg) Ralfs, 1861 accepted as Navicula sinensis Ehrenberg, 1847 (uncertain > unassessed)
249. Species Pleurosigma sinuosum (Ehrenberg) Ralfs in Pritchard, 1861 accepted as Navicula sinuosa Ehrenberg, 1840 (uncertain > unassessed)
250. Species Pleurosigma smithianum Castracane, 1886 (uncertain > unassessed)
251. Species Pleurosigma smithii Grunow, 1860 (uncertain > unassessed)
252. Species Pleurosigma speciosum sensu Meunier, 1910 (uncertain > unassessed)
253. Species Pleurosigma spectabile Grunow, 1891 (uncertain > unassessed)
254. Species Pleurosigma spectabilis Grunow ex Moller, 1868, 1881 (uncertain > unassessed)
255. Species Pleurosigma spectrosum Barkas, 1867 (uncertain > unassessed)
256. Species Pleurosigma spinulosum Pantocsek & Greguss in Greguss, 1913 (uncertain > unassessed)
257. Species Pleurosigma staurolineatum Karsten, 1899 (uncertain > unassessed)
258. Species Pleurosigma sterrenburgii Stidolph, 1993 (uncertain > unassessed)
259. Species Pleurosigma stidolphii Sterrenburg, 1991 (uncertain > unassessed)
260. Species Pleurosigma striatum Schumann, 1867 (uncertain > unassessed)
261. Species Pleurosigma subhyalinum Hustedt & Aleem, 1951 (uncertain > unassessed)
262. Species Pleurosigma subrecta (Cleve in Cleve & Grunow) Cleve, 1894 accepted as Pleurosigma subrectum Cleve, 1880 (uncertain > unassessed)
263. Species Pleurosigma subrectum Cleve, 1880 (uncertain > unassessed)
264. Species Pleurosigma subrectum Grunow, 1860 (uncertain > unassessed)
265. Species Pleurosigma subrigidum Grunow, 1880 (uncertain > unassessed)
266. Species Pleurosigma subsalina Peragallo (uncertain > unassessed)
267. Species Pleurosigma subsalinum H.Peragallo, 1891 accepted as Pleurosigma spenceri var. subsalinum H. Peragallo, 1891 (uncertain > unassessed)
268. Species Pleurosigma subsalsum Wislouch & Kolbe, 1916 (uncertain > unassessed)
269. Species Pleurosigma subtile (Brébisson in Kutzing) Ralfs in Pritchard, 1861 accepted as Navicula subtilis Brebisson in Kutzing, 1849 (uncertain > unassessed)
270. Species Pleurosigma subtilissimum T.Marsson, 1900 (uncertain > unassessed)
271. Species Pleurosigma suluense Mann, 1925 (uncertain > unassessed)
272. Species Pleurosigma sumatricum H. Peragallo, 1891 (uncertain > unassessed)
273. Species Pleurosigma tahitense Castracane, 1886 (uncertain > unassessed)
274. Species Pleurosigma tahitensis Witt, 1873 (uncertain > unassessed)
275. Species Pleurosigma tahitianum Ricard, 1975 (uncertain > unassessed)
276. Species Pleurosigma temperei (Cleve) M.Peragallo, 1903 accepted as Gyrosigma temperei Cleve, 1893 (uncertain > unassessed)
277. Species Pleurosigma tenerum E. Jorgensen, 1905 (uncertain > unassessed)
278. Species Pleurosigma tenuiforme C.H. von Quillfeldt, 2000 (uncertain > unassessed)
279. Species Pleurosigma tenuirostris Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
280. Species Pleurosigma terryanum H.Peragallo, 1891 (uncertain > unassessed)
281. Species Pleurosigma thaitiense Castracane, 1886 (uncertain > unassessed)
282. Species Pleurosigma thumii (Castracane ex H. Peragallo) De Toni, 1891 accepted as Pleurosigma nubecula var. thumii Castracane ex H. Peragallo, 1891 (uncertain > unassessed)
283. Species Pleurosigma thumii Cleve ex H. Peragallo, 1891 (uncertain > unassessed)
284. Species Pleurosigma thuringicum (Kützing) Ralfs in Pritchard, 1861 accepted as Navicula thuringica Kützing, 1844 (uncertain > unassessed)
285. Species Pleurosigma tortuosum Cleve, 1881 (uncertain > unassessed)
286. Species Pleurosigma transylvanicum Pantocsek, 1892 (uncertain > unassessed)
287. Species Pleurosigma tropicum Grunow, 1860 (uncertain > unassessed)
288. Species Pleurosigma umbilicatum Cleve, 1894 (uncertain > unassessed)
289. Species Pleurosigma vairaense Ricard, 1975 (uncertain > unassessed)
290. Species Pleurosigma virginiacum H.L. Smith, 1877 (uncertain > unassessed)
291. Species Pleurosigma virginica Peticolas, 1877 (uncertain > unassessed)
292. Species Pleurosigma vitrea (uncertain > unassessed)
293. Species Pleurosigma vitreum Cleve, 1880 (uncertain > unassessed)
294. Species Pleurosigma vitreum sensu Meunier, 1910 (uncertain > unassessed)
295. Species Pleurosigma wansbecki (uncertain > unassessed)
296. Species Pleurosigma weissflogii (Grunow in Cleve & Grunow) Cleve, 1894 accepted as Rhoicosigma weissflogii var. weissflogii Grunow in Cleve & Grunow, 1880 (uncertain > unassessed)
297. Species Pleurosigma wigginsianum Hendey, 1971 (uncertain > unassessed)
298. Species Pleurosigma wormleyi W.S.Sullivant, 1859 (uncertain > unassessed)

marine, brackish, fresh

Smith, W. (1852). Notes on the Diatomaceae with descriptions of British Species included in the genus Pleurosigma. Annals and Magazine of Natural History, 2nd series,, 9: 1-12, 2 pls. [details] 

Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2025). DiatomBase. Pleurosigma W. Smith, 1852. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=149181 on 2025-05-07

Marine Species Traits editorial board (2025). Marine Species Traits. Pleurosigma W. Smith, 1852. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=149181 on 2025-05-07

[taxonomic tree]