1. Species Pleurosigma aestuarii (Brébisson ex Kützing) W.Smith, 1853
2. Species Pleurosigma chilensis Hustedt & Krasske in Krasske, 1941
3. Species Pleurosigma cuspidatum (Cleve) H.Peragallo, 1891
4. Species Pleurosigma decorum W.Smith, 1853
5. Species Pleurosigma delicatulum W.Smith, 1852
6. Species Pleurosigma diminutum Grunow, 1880
7. Species Pleurosigma directum Grunow, 1880
8. Species Pleurosigma elongatum W.Smith, 1852
9. Species Pleurosigma eudon
10. Species Pleurosigma frenguellianum Sunesen, Sterrenburg & Sar, 2014
11. Species Pleurosigma guarreranum E.A.Sar, F.A.S.Sterrenburg & I.Sunesen, 2013
12. Species Pleurosigma hinzianum Sterrenburg, Sunesen & Sar, 2014
13. Species Pleurosigma intermedium W.Smith, 1853
14. Species Pleurosigma normanii Ralfs, 1861
15. Species Pleurosigma pulchrum Grunow, 1860
16. Species Pleurosigma rahlehense G.Reid
17. Species Pleurosigma rigidum W.Smith, 1853
18. Species Pleurosigma rushdyense G.Reid
19. Species Pleurosigma salinarum (Grunow) Grunow, 1880
20. Species Pleurosigma spenceri (Bailey ex Quekett) W.Smith, 1856
21. Species Pleurosigma spencerii Grunow
22. Species Pleurosigma strigosum W.Smith, 1852
23. Species Pleurosigma validum Shadbolt, 1854
24. Species Pleurosigma williamsii G.Reid
25. Species Pleurosigma balticum (Ehrenberg) W.Smith, 1852 accepted as Gyrosigma balticum (Ehrenberg) Rabenhorst, 1853 (synonym)
26. 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)
27. Species Pleurosigma fasciola (Ehrenberg) W.Smith, 1852 accepted as Gyrosigma fasciola (Ehrenberg) J.W.Griffith & Henfrey, 1856 accepted as Ceratoneis fasciola Ehrenberg, 1839 (synonym)
28. Species Pleurosigma hippocampus W.Smith, 1852 accepted as Gyrosigma attenuatum (Kützing) Rabenhorst, 1853 (synonym)
29. 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)
30. Species Pleurosigma peisonis Grunow, 1860 accepted as Gyrosigma peisonis (Grunow) Hustedt, 1930 accepted as Pleurosigma peisonis var. peisonis Grunow, 1860 (synonym)
31. 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)
32. Species Pleurosigma pusillum Grunow, 1880 accepted as Pleurosigma salinarum (Grunow) Grunow, 1880 (synonym)
33. Species Pleurosigma robustum Grunow, 1880 accepted as Gyrosigma robustum (Grunow) Cleve, 1894
34. Species Pleurosigma scalprum (Gaillon) Ralfs, 1861 accepted as Gyrosigma scalprum (Gaillon) Sterrenburg, 2007 accepted as Navicula scalprum Gaillon, 1827 (synonym)
35. Species Pleurosigma staurophorum Grunow, 1880 accepted as Costasigma staurophorum (Grunow) G.Reid, 2012 (synonym)
36. 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)
37. Species Pleurosigma sulcatum Grunow, 1880 accepted as Gyrosigma fasciola var. sulcatum (Grunow) Cleve, 1894 (synonym)
38. Species Pleurosigma transversale W.Smith accepted as Pleurosigma naviculaceum Brébisson, 1854 (synonym)
39. Species Pleurosigma acus A.Mann, 1925 (uncertain > unassessed)
40. Species Pleurosigma acutum Norman ex Ralfs, 1861 (uncertain > unassessed)
41. Species Pleurosigma affine Grunow, 1880 (uncertain > unassessed)
42. Species Pleurosigma angulatum (Queckett) W.Smith, 1852 (uncertain > unassessed)
43. Species Pleurosigma angustum Donkin, 1858 (uncertain > unassessed)
44. Species Pleurosigma eximium (Thwaites) Grunow, 1880 accepted as Schizonema eximium Thwaites, 1848 (uncertain > unassessed)
45. Species Pleurosigma exsul Cleve, 1894 (uncertain > unassessed)
46. Species Pleurosigma falcatum Donkin, 1861 (uncertain > unassessed)
47. Species Pleurosigma falx Mann, 1925 (uncertain > unassessed)
48. Species Pleurosigma hamuliferum Brun, 1889 (uncertain > unassessed)
49. Species Pleurosigma inscriptura M.A.Harper, 2009 (uncertain > unassessed)
50. Species Pleurosigma japonicum Castracane, 1886 (uncertain > unassessed)
51. Species Pleurosigma lineare Grunow in Cleve & Möller, 1879 (uncertain > unassessed)
52. Species Pleurosigma lorenzii Grunow, 1860 (uncertain > unassessed)
53. Species Pleurosigma major Liu & Chin, 1980 (uncertain > unassessed)
54. Species Pleurosigma maroccanum (Cleve ex H.Peragallo) Cleve, 1894 accepted as Rhoicosigma maroccanum Cleve ex H.Peragallo, 1891 (uncertain > unassessed)
55. Species Pleurosigma minutum Donkin, 1858 (uncertain > unassessed)
56. Species Pleurosigma obscurum W.Smith, 1852 (uncertain > unassessed)
57. Species Pleurosigma obtusum Mann, 1925 (uncertain > unassessed)
58. Species Pleurosigma pelagicum (H.Peragallo) Cleve, 1894 accepted as Pleurosigma acutum var. pelagicum H. Peragallo manus. ex H. Peragallo, 1891 (uncertain > unassessed)
59. Species Pleurosigma perthense J.John, 1983 (uncertain > unassessed)
60. Species Pleurosigma planctonicum Cleve-Euler, 1952 (uncertain > unassessed)
61. Species Pleurosigma planctonicum R.Simonsen, 1974 (uncertain > unassessed)
62. Species Pleurosigma quininpiaceii M.Peragallo, 1908 (uncertain > unassessed)
63. Species Pleurosigma rectum Donkin, 1858 (uncertain > unassessed)
64. Species Pleurosigma reticulatum (Norman) Hustedt, 1955 accepted as Donkinia reticulata Ralfs in Pritchard, 1861 (uncertain > unassessed)
65. Species Pleurosigma simonsenii Hasle, 1990 (uncertain > unassessed)
66. Species Pleurosigma spectabile Grunow, 1891 (uncertain > unassessed)
67. Species Pleurosigma tahitianum Ricard, 1975 (uncertain > unassessed)
68. Species Pleurosigma temperei (Cleve) M.Peragallo, 1903 accepted as Gyrosigma temperei Cleve, 1893 (uncertain > unassessed)
69. Species Pleurosigma terryanum H.Peragallo, 1891 (uncertain > unassessed)

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