1. Species Pediastrum acantostephanos Sámano Bishop, 1932 (uncertain)
2. Species Pediastrum acutilobium Corda (uncertain)
3. Species Pediastrum acutilobum Corda, 1839 (uncertain)
4. Species Pediastrum acutum Corda, 1839 (uncertain)
5. Species Pediastrum alternans Nygaard, 1950 accepted as Pseudopediastrum alternans (Nygaard) M.Jena & C.Bock, 2014
6. Species Pediastrum angulosum Ehrenberg ex Meneghini, 1840
7. Species Pediastrum araneosum (Raciborski) G.M.Smith, 1916 accepted as Pediastrum angulosum Ehrenberg ex Meneghini, 1840 (synonym)
8. Species Pediastrum argentinense Bourrelly & Tell, 1979
9. Species Pediastrum asperum Braun, 1855 accepted as Pediastrum pertusum Kützing, 1845 accepted as Pediastrum duplex Meyen, 1829
10. Species Pediastrum asymmetricum T.Yamagishi & E.Hegewald, 1994 accepted as Monactinus asymmetricus (Yamagishi & E.Hegewald) E.Hegewald, 2005 (synonym)
11. Species Pediastrum bareilliense I.Habib, U.K.Chaturvedi & U.C.Pandey, 1991
12. Species Pediastrum berolinense E.Hegewald, 2005
13. Species Pediastrum bidentulum A.Braun, 1885 accepted as Pediastrum boryanum (Turpin) Meneghini, 1840 accepted as Pseudopediastrum boryanum (Turpin) E.Hegewald, 2005 (synonym)
14. Species Pediastrum bifidites L.R.Wilson & Hoffmeister, 1953 †
15. Species Pediastrum bijuga
16. Species Pediastrum bijugum No authority known (uncertain, uncertain taxonomic status subjected to verification)
17. Species Pediastrum biradiatum Meyen, 1829 accepted as Parapediastrum biradiatum (Meyen) E.Hegewald, 2005 (synonym)
18. Species Pediastrum bisnupurense Keshri & P.Mallick, 2013
19. Species Pediastrum biwae Negoro, 1954
20. Species Pediastrum bobyensis Kant & P.Gupta, 1998
21. Species Pediastrum boryanum (Turpin) Meneghini, 1840 accepted as Pseudopediastrum boryanum (Turpin) E.Hegewald, 2005 (synonym)
22. Species Pediastrum brachylobum Braun, 1855 accepted as Pediastrum duplex Meyen, 1829
23. Species Pediastrum braunianum Grunow, 1859 accepted as Pediastrum integrum var. braunianum (Grunow) Nordsted, 1878
24. Species Pediastrum braunii Wartmann, 1862
25. Species Pediastrum caudatum Braun, 1855 (uncertain)
26. Species Pediastrum clathratum (Schröder) Lemmermann, 1897 accepted as Pediastrum simplex Meyen, 1829 accepted as Monactinus simplex (Meyen) Corda, 1839 (synonym)
27. Species Pediastrum coelastroides Wołoszyńska, 1914 (uncertain)
28. Species Pediastrum compactum A.W.Bennett, 1886 (uncertain)
29. Species Pediastrum conchense P.González, 1940 accepted as Pediastrum glanduliferum A.W.Bennett, 1892 accepted as Pediastrum boryanum var. longicorne (Reinsch) Hansgirg, 1867 accepted as Pseudopediastrum boryanum var. longicorne (Reinsch) Tsarenko, 2011 (synonym)
30. Species Pediastrum constrictum Hassall, 1845 accepted as Pediastrum boryanum (Turpin) Meneghini, 1840 accepted as Pseudopediastrum boryanum (Turpin) E.Hegewald, 2005 (synonym)
31. Species Pediastrum contiguum P.González, 1940
32. Species Pediastrum cornutum (Raciborski) O.V.Troitskaya, 1933 accepted as Pseudopediastrum cornutum (Raciborski) Lenarczyk, 2020
33. Species Pediastrum cruciatum Haeckel
34. Species Pediastrum cruciatum Kützing, 1845 accepted as Pediastrum boryanum (Turpin) Meneghini, 1840 accepted as Pseudopediastrum boryanum (Turpin) E.Hegewald, 2005 (synonym)
35. Species Pediastrum crux-melitensis (Corda) A.Braun, 1855 accepted as Stauridium tetras (Ehrenberg) E.Hegewald, 2005
36. Species Pediastrum darwinii Haeckel, 1899 (uncertain)
37. Species Pediastrum delicatites L.R.Wilson & Hoffmeister, 1953 †
38. Species Pediastrum diffusum H.P.Singh & A.K.Khanna, 1976 †
39. Species Pediastrum diodon Corda, 1839 (uncertain)
40. Species Pediastrum duodenarium (Bailey) Archer, 1861 accepted as Pediastrum simplex var. duodenarium (J.W.Bailey) Rabenhorst, 1862 accepted as Pediastrum simplex Meyen, 1829 accepted as Monactinus simplex (Meyen) Corda, 1839 (synonym)
41. Species Pediastrum duplex Meyen, 1829
42. Species Pediastrum ehrenbergii (Corda) Braun, 1855 accepted as Pediastrum tetras (Ehrenberg) Ralfs, 1845 accepted as Stauridium tetras (Ehrenberg) E.Hegewald, 2005 (synonym)
43. Species Pediastrum elegans Hassall, 1845
44. Species Pediastrum elegans Haeckel, 1899
45. Species Pediastrum ellipticum Ehrenberg ex Ralfs, 1848
46. Species Pediastrum emarginatum Kützing, 1849 (uncertain)
47. Species Pediastrum enoplon West & G.S.West, 1895 accepted as Pediastrum simplex Meyen, 1829 accepted as Monactinus simplex (Meyen) Corda, 1839 (synonym)
48. Species Pediastrum forcipatum (Corda) Braun
49. Species Pediastrum forcipatum (Corda) A.Braun, 1855 accepted as Pediastrum boryanum var. forcipatum (Corda) Chodat, 1902
50. Species Pediastrum furcatum Haeckel, 1899 (uncertain)
51. Species Pediastrum glanduliferum A.W.Bennett, 1892 accepted as Pediastrum boryanum var. longicorne (Reinsch) Hansgirg, 1867 accepted as Pseudopediastrum boryanum var. longicorne (Reinsch) Tsarenko, 2011 (synonym)
52. Species Pediastrum gracile A.Braun accepted as Pediastrum duplex var. gracillimum West & G.S.West, 1895 accepted as Lacunastrum gracillimum (West & G.S. West) H.McManus, 2011 (synonym)
53. Species Pediastrum gracillimum (West & G.S.West) Thunmark, 1945 accepted as Lacunastrum gracillimum (West & G.S. West) H.McManus, 2011 (synonym)
54. Species Pediastrum granulatum Kützing, 1845 accepted as Pediastrum boryanum (Turpin) Meneghini, 1840 accepted as Pseudopediastrum boryanum (Turpin) E.Hegewald, 2005 (synonym)
55. Species Pediastrum habibii Habib & Chaturvedi, 1992 (uncertain, uncertain taxonomic status subjected to verification)
56. Species Pediastrum haynaldii Istvanfy, 1887 accepted as Pediastrum angulosum var. haynaldii (Istvanfy) Raciborski
57. Species Pediastrum heimii Bourrelly, 1940 (uncertain)
58. Species Pediastrum heptactis (Ehrenberg) Meneghini, 1840 (uncertain)
59. Species Pediastrum hexactis (Ehrenberg) Jenner, 1845 (uncertain)
60. Species Pediastrum incavatum W.B.Turner, 1893 accepted as Pediastrum tetras (Ehrenberg) Ralfs, 1845 accepted as Stauridium tetras (Ehrenberg) E.Hegewald, 2005
61. Species Pediastrum incisum
62. Species Pediastrum inconspicuum Kant & P.Gupta, 1998
63. Species Pediastrum integrum Nägeli, 1849
64. Species Pediastrum irregulare Corda, 1835 (uncertain)
65. Species Pediastrum janaktalense S.P.Sharma, Saksena & M.S.Agarkar, 1985
66. Species Pediastrum kajaites L.R.Wilson & Hoffmeister, 1953 †
67. Species Pediastrum kawraiskyi Schmidle, 1897 accepted as Pseudopediastrum kawraiskyi (Schmidle) E.Hegewald, 2005 (synonym)
68. Species Pediastrum lehense Kant & P.Gupta, 1998
69. Species Pediastrum leonensis Tell & M.C.Zamaloa, 2004 †
70. Species Pediastrum lobatum
71. Species Pediastrum longicorne Kant & P.Gupta, 1998
72. Species Pediastrum longicornutum (Gutwinski) A.Comas, 1989 accepted as Parapediastrum biradiatum var. longecornutum (Gutwinski) Tsarenko, 2011 (synonym)
73. Species Pediastrum lunatum Haeckel, 1899 (uncertain)
74. Species Pediastrum magnum H.P.Singh & A.K.Khanna, 1976 †
75. Species Pediastrum marvillense Thérézien & Couté ex Parra Barrientos
76. Species Pediastrum marvillense Thérézien & Couté ex Parra Barrientos, 1979
77. Species Pediastrum mirabile Lemmermann, 1895 (uncertain)
78. Species Pediastrum musterii Tell & G.Mataloni, 1990
79. Species Pediastrum muticum Kützing, 1849 accepted as Pseudopediastrum brevicorne (A.Braun) M.Jena & C.Bock, 2014 (synonym)
80. Species Pediastrum napoleonis Ralfs accepted as Pediastrum duplex Meyen, 1829 (synonym)
81. Species Pediastrum obtusangulum Perty, 1852 accepted as Pediastrum tetras (Ehrenberg) Ralfs, 1845 accepted as Stauridium tetras (Ehrenberg) E.Hegewald, 2005
82. Species Pediastrum obtusum Lucks, 1907
83. Species Pediastrum octonum Haeckel, 1899 (uncertain)
84. Species Pediastrum orbitale Komárek, 1983
85. Species Pediastrum orientale (Skuja) V.Jankovská & J.Komárek, 1995
86. Species Pediastrum ovatum (Ehrenberg) A.Braun, 1855 accepted as Pediastrum simplex Meyen, 1829 accepted as Monactinus simplex (Meyen) Corda, 1839
87. Species Pediastrum paleogeneites L.R.Wilson & Hoffmeister, 1953 †
88. Species Pediastrum pallidum H.P.Singh & A.K.Khanna, 1976 †
89. Species Pediastrum patagonicum Tell & G.Mataloni, 1990
90. Species Pediastrum pearsonii G.S.West, 1912 accepted as Pseudopediastrum pearsonii (G.S.West) M.Jena & C.Bock, 2014
91. Species Pediastrum pertusum Kützing, 1845 accepted as Pediastrum duplex Meyen, 1829 (synonym)
92. Species Pediastrum polydens Morozova-Vodyanitskaya, 1925
93. Species Pediastrum praecox Morozova-Vodyanitskaya, 1925
94. Species Pediastrum privum (Printz) Hegewald, 1979 accepted as Stauridium privum (Printz) Hegewald, 2005
95. Species Pediastrum quadrangulum Corda, 1835 (uncertain)
96. Species Pediastrum quadratum (Morren) Meneghini, 1840 accepted as Crucigenia quadrata Morren, 1830
97. Species Pediastrum quadricornutum Prescott, 1944 accepted as Pediastrum obtusum Lucks, 1907
98. Species Pediastrum renicarpum (Turpin) Corda, 1839 (uncertain)
99. Species Pediastrum reticulatum (Lagerh.) Zacharias, 1898 (uncertain)
100. Species Pediastrum rotula (Ehrenberg) Kützing, 1845 accepted as Pediastrum biradiatum Meyen, 1829 accepted as Parapediastrum biradiatum (Meyen) E.Hegewald, 2005 (synonym)
101. Species Pediastrum sarmae Keshri & P.Mallick, 2013
102. Species Pediastrum schroeteri Lemmermann
103. Species Pediastrum sculptatum G.M.Smith, 1916
104. Species Pediastrum selenaea Kützing, 1845 accepted as Pediastrum duplex Meyen, 1829 (synonym)
105. Species Pediastrum serratum Reinsch, 1866 accepted as Pseudopediastrum boryanum (Turpin) E.Hegewald, 2005
106. Species Pediastrum simplex Meyen, 1829 accepted as Monactinus simplex (Meyen) Corda, 1839 (synonym)
107. Species Pediastrum solare Haeckel, 1899 (uncertain)
108. Species Pediastrum sorastroides Wołoszyńska, 1914 (uncertain)
109. Species Pediastrum speciosum (Losana) Parra Barrientos, 1979 (uncertain)
110. Species Pediastrum spinosum Kant & P.Gupta, 1998
111. Species Pediastrum sturmii Reinsch, 1867 accepted as Monactinus simplex var. sturmii (Reinsch) Pérez, Maidana & Comas, 2009 (synonym)
112. Species Pediastrum subgranulatum (Raciborski) J.Komárek & V.Jankovsk, 2001
113. Species Pediastrum subuliferum Kützing (uncertain)
114. Species Pediastrum taylorii Sieminska, 1965
115. Species Pediastrum tetraodon (Corda) A.Braun
116. Species Pediastrum tetraodon (Corda) A.Braun, 1855 accepted as Stauridium tetras var. tetraodon (Corda) J.D.Hall & Karol, 2016
117. Species Pediastrum tetraodon Corda, 1839 accepted as Pediastrum biradiatum var. emarginatum (Ehrenberg) Lagerheim, 1882
118. Species Pediastrum tetrapodum Morozova-Vodyanitskaya, 1925
119. Species Pediastrum tetras (Ehrenberg) Ralfs, 1845 accepted as Stauridium tetras (Ehrenberg) E.Hegewald, 2005 (synonym)
120. Species Pediastrum tetrax
121. Species Pediastrum triangulum (Ehrenberg) Braun, 1855 (uncertain)
122. Species Pediastrum tricornutum Borge, 1892 accepted as Pediastrum braunii Wartmann, 1862 (synonym)
123. Species Pediastrum tricuspidatum Conrad, 1949
124. Species Pediastrum tricyclia (Ehrenberg) Corda
125. Species Pediastrum tricyclium Hassall ex Ralfs
126. Species Pediastrum triplex Sharma, Saksena & Agarkar (uncertain)
127. Species Pediastrum trochiscus Haeckel
128. Species Pediastrum undulatum (Wille) Boldt
129. Species Pediastrum vagum Kützing
130. Species Pediastrum westii Woloszynska
131. Species Pediastrum willei Comas Gonzalez, Perez Baliero & Rio Rams, 2006 (uncertain)
132. Species Pediastrum wilsonii H.P.Singh & A.K.Khanna, 1976 †
133. Species Pediastrum wintonense Croome & Fabbro, 2005

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