1. Species Calothrix aberrans Cholnoky, 1952
2. Species Calothrix adscendens Bornet & Flahault, 1886
3. Species Calothrix aequalis Skuja, 1937
4. Species Calothrix aeruginea Thuret ex Bornet & Flahault, 1886
5. Species Calothrix aeruginosa Woronichin, 1923
6. Species Calothrix aestuarii Gayral & Mazancourt, 1958
7. Species Calothrix africana Schmidle, 1901
8. Species Calothrix allorgei Frémy, 1945
9. Species Calothrix alternans Y.-Y.Li, 1984
10. Species Calothrix antarctica F.E.Fritsch, 1912
11. Species Calothrix atricha Frémy, 1930
12. Species Calothrix australiensis A.M.Scott & Prescott, 1958
13. Species Calothrix baileyi J.J.Copeland, 1936
14. Species Calothrix bharadwajae G.De Toni, 1939
15. Species Calothrix borealis Whelden, 1947
16. Species Calothrix bossei Frémy, 1930
17. Species Calothrix braunii Bornet & Flahault, 1886
18. Species Calothrix breviarticulata West & G.S.West, 1897
19. Species Calothrix brevissima G.S.West, 1907
20. Species Calothrix bugensis Poljanskij [Polyanskii], 1955
21. Species Calothrix calida P.Richter, 1898
22. Species Calothrix candelii González Guerrero, 1930
23. Species Calothrix capitularis Uher, 2007
24. Species Calothrix castellii Bornet & Flahault, 1886
25. Species Calothrix cavernarum J.J.Copeland, 1936
26. Species Calothrix charicola J.J.Copeland, 1936
27. Species Calothrix chrysaloidea G.S.An, 1989
28. Species Calothrix clausa Setchell & N.L.Gardner, 1930
29. Species Calothrix clavata G.S.West, 1914
30. Species Calothrix clavatoides S.L.Ghose, 1927
31. Species Calothrix codicola Setchell & N.L.Gardner, 1930
32. Species Calothrix columbiana G.S.West, 1914
33. Species Calothrix compacta Margalef, 1953
34. Species Calothrix compacta C.-C.Jao, 1939
35. Species Calothrix confervicola C.Agardh ex Bornet & Flahault, 1886
36. Species Calothrix conica N.L.Gardner, 1927
37. Species Calothrix consociata Bornet & Flahault, 1886
38. Species Calothrix contarenii Bornet & Flahault, 1886
39. Species Calothrix coriacea J.J.Copeland, 1936
40. Species Calothrix cottonii J.De Toni, 1934
41. Species Calothrix cylindrica Frémy, 1924
42. Species Calothrix cystoseirae Schiffner, 1933
43. Species Calothrix debii Bharadwaja, 1963
44. Species Calothrix desertica Schwabe, 1960
45. Species Calothrix desikacharyensis Vasishta, 1963
46. Species Calothrix divergens C.L.Sant'Anna, L.H.Z.Branco & S.M.F.Silva, 1992
47. Species Calothrix dolichomeres Skuja, 1949
48. Species Calothrix dumus C.D.Villanueva & Casamatta, 2019
49. Species Calothrix elenkinii Kossinskaja, 1924
50. Species Calothrix elsteri Komárek, Nedbalová & Hauer, 2012
51. Species Calothrix epiphytica West & G.S.West, 1897
52. Species Calothrix estonica Kukk, 1959
53. Species Calothrix evanescens N.L.Gardner, 1927
54. Species Calothrix fasciculata C.Agardh ex Bornet & Flahault, 1886
55. Species Calothrix feldmannii Bourrelly, 1952
56. Species Calothrix flahaultii Frémy, 1927
57. Species Calothrix flamulorum C.L.Sant'Anna, S.M.F.Silva & L.H.Z.Branco, 1992
58. Species Calothrix floccosa (Woronichin) Geitler, 1925
59. Species Calothrix fonticola Brabez, 1941
60. Species Calothrix fullerbornii Schmidle, 1902
61. Species Calothrix fusca Bornet & Flahault, 1886
62. Species Calothrix fuscoviolacea P.Crouan & H.Crouan ex Bornet & Flahault, 1886
63. Species Calothrix galpinii K.Cholnoky-Pfannkuche, 1968
64. Species Calothrix geitleri J.J.Copeland, 1936
65. Species Calothrix geitonos Skuja, 1949
66. Species Calothrix gelatinosa Fritsch & Rich, 1924
67. Species Calothrix genuflexa Philson, 1939
68. Species Calothrix ghosei Bharadwaja, 1935
69. Species Calothrix gigas J.J.Copeland, 1936
70. Species Calothrix gloeocola Skuja, 1949
71. Species Calothrix goetzei Schmidle, 1901
72. Species Calothrix gracilis Wolly, 1887
73. Species Calothrix hollerbachii Draganov, 1981
74. Species Calothrix hunanica C.-C.Jao, 1940
75. Species Calothrix inaequabilis Cado, 1958
76. Species Calothrix inserta Nygaard, 1932
77. Species Calothrix intermedia N.L.Gardner, 1932
78. Species Calothrix intorta C.-C.Jao, 1940
79. Species Calothrix intracellularis Vasishta, 1962
80. Species Calothrix intricata F.E.Fritsch, 1912
81. Species Calothrix javanica De Wildeman, 1897
82. Species Calothrix karnatakensis Gonzalves & Kamat, 1960
83. Species Calothrix kawraiskyi Schmidle, 1897
84. Species Calothrix kosinskajae Elenkin, 1927
85. Species Calothrix kossinskajae V.I.Poljansky, 1927
86. Species Calothrix kuntzei P.Richter, 1898
87. Species Calothrix linearis N.L.Gardner, 1927
88. Species Calothrix linearis N.L.Gardner, 1926
89. Species Calothrix litoralis Anand, 1937
90. Species Calothrix longifila W.R.Taylor, 1928
91. Species Calothrix lucknowensis Prasad & Mehrotra, 1976
92. Species Calothrix marchica Lemmermann, 1914
93. Species Calothrix membranacea Schmidle, 1901
94. Species Calothrix micromeres Skuja, 1937
95. Species Calothrix minima Frémy, 1924
96. Species Calothrix minuscula Weber-van Bosse, 1913
97. Species Calothrix minuta A.W.Bennett, 1888
98. Species Calothrix nidulans Setchell & N.L.Gardner, 1924
99. Species Calothrix nodulosa Setchell & N.L.Gardner, 1924
100. Species Calothrix obtusa Brabez, 1941
101. Species Calothrix orsiniana Thuret ex Engler, 1892
102. Species Calothrix parasitica Thuret ex Bornet & Flahault, 1886
103. Species Calothrix parietina Thuret ex Bornet & Flahault, 1886
104. Species Calothrix parva Ercegović, 1925
105. Species Calothrix polaris Komárek & Elster, 2015
106. Species Calothrix polymorpha Y.-Y.Li, 1984
107. Species Calothrix prolifera Flahault, 1886
108. Species Calothrix pulvinata C.Agardh ex Bornet & Flahault, 1886
109. Species Calothrix ramenskii Elenkin, 1922
110. Species Calothrix rectangularis Setchell & N.L.Gardner, 1918
111. Species Calothrix reptans Geilter, 1933
112. Species Calothrix rhizosoleniae Lemmermann, 1899
113. Species Calothrix robusta Setchell & N.L.Gardner, 1918
114. Species Calothrix rodriguezii Bourrelly, 1952
115. Species Calothrix rosea W.R.Taylor, 1928
116. Species Calothrix sandvicensis Schmidle, 1897
117. Species Calothrix santapaui Gonzalves & Kamat, 1960
118. Species Calothrix schweickertii Cholnoky, 1952
119. Species Calothrix scopulorum C.Agardh ex Bornet & Flahault, 1886
120. Species Calothrix scytonemicola Tilden, 1910
121. Species Calothrix simplex N.L.Gardner, 1927
122. Species Calothrix simulans N.L.Gardner, 1927
123. Species Calothrix smithii (Berkeley & Thwaites) Cooke, 1884
124. Species Calothrix sphaerospora Prasad & Srivastava, 1966
125. Species Calothrix stagnalis Gomont, 1895
126. Species Calothrix stellaris Bornet & Flahault, 1886
127. Species Calothrix subantarctica C.-C.Jao, 1939
128. Species Calothrix submarchica C.G.M.Archibald, 1967
129. Species Calothrix subsimplex C.-C.Jao, 1940
130. Species Calothrix tenella N.L.Gardner, 1927
131. Species Calothrix thermalis Hasngirg ex Bornet & Flahault, 1886
132. Species Calothrix turfosa Geilter, 1933
133. Species Calothrix viguieri Frémy, 1930
134. Species Calothrix violacea Jaag, 1938
135. Species Calothrix vivipara Harvey ex Bornet & Flahault, 1886
136. Species Calothrix weberi Schmidle, 1899
137. Species Calothrix wembaerensis Hieronymus & Schmidle, 1898
138. Species Calothrix wrangelii C.Agardh, 1824
139. Species Calothrix aegagropila Kützing, 1833 accepted as Tolypothrix lanata var. aegagropila Hansgirg, 1892 (synonym)
140. Species Calothrix agardhii P.L.Crouan & H.M.Crouan, 1867 accepted as Leibleinia agardhii (Gomont) Anagnostidis & Komárek, 1988 accepted as Lyngbya agardhii Gomont, 1892 (synonym)
141. Species Calothrix austrogeorgica (Carlson) Pankow, Haendel & Richter, 1990 accepted as Dichothrix austrogeorgica G.W.F Carlson, 1913
142. Species Calothrix balearica Bornet & Flahault ex Forti, 1907 accepted as Phormidiochaete balearica (Bornet & Flahault ex Forti) Komárek, 2001 (synonym)
143. Species Calothrix baueriana (Bornet & Flahault) Hansgirg, 1891 accepted as Dichothrix baueriana Bornet & Flahault, 1886
144. Species Calothrix caespitosa Rabenhorst, 1873 accepted as Homoeothrix caespitosa Kirchner, 1898 (synonym)
145. Species Calothrix cartilaginea G.S.West, 1907 accepted as Homoeothrix cartilaginea (G.S.West) Lemmermann, 1910 (synonym)
146. Species Calothrix chapmannii Lami & Meslin, 1959 accepted as Calothrix cottonii J.De Toni, 1934
147. Species Calothrix comoides Harvey ex Bornet & Flahault, 1886 accepted as Blennothrix comoides (Gomont) Anagnostidis & Komárek, 1988 (synonym)
148. Species Calothrix crustacea Thuret ex Bornet & Flahault, 1886 accepted as Scytonematopsis crustacea (Thuret ex Bornet & Flahault) Koválik & Komárek, 1988
149. Species Calothrix decolorata (Nägeli) Hansgirg, 1889 accepted as Calothrix parietina var. decolorata Hansgirg, 1892 (synonym)
150. Species Calothrix donnellii (Wolle) Forti, 1907 accepted as Mastigonema donnellii Wolle ex Forti, 1907
151. Species Calothrix dura Harvey ex Bornet & Flahault, 1886 accepted as Tildenia dura (Harvey ex Bornet & Flahault) Poljanskij, 1936
152. Species Calothrix endophytica A.D.Cotton, 1912 accepted as Calothrix cottonii J.De Toni, 1934
153. Species Calothrix endophytica Lemmermann, 1896 accepted as Homoeothrix endophytica (Lemmermann) Lemmermann, 1907
154. Species Calothrix gardneri G.De Toni, 1934 accepted as Calothrix intermedia N.L.Gardner, 1932
155. Species Calothrix gelatinosa (Böcher) V.Poljanskij, 1949 accepted as Dichothrix gelatinosa Böcher, 1946
156. Species Calothrix hamata (C.-C.Jao) Starmach, 1966 accepted as Dichothrix hamata C.-C.Jao, 1940
157. Species Calothrix hansgirgi Schmidle, 1900 accepted as Homoeothrix hansgirgi (Schmidle) Lemmermann, 1907 (synonym)
158. Species Calothrix hydnoides Harvey, 1833 accepted as Symploca hydnoides Kützing ex Gomont, 1892 (synonym)
159. Species Calothrix interrupta Carmichael, 1833 accepted as Rhizonema interruptum Lücking & Barrie, 2014 (synonym)
160. Species Calothrix janthiphora Fiorini-Mazzanti ex Gomont, 1892 accepted as Phormidium janthiphorum (Gomont) Elenkin, 1949 (synonym)
161. Species Calothrix juliana Bornet & Flahault ex Gomont, 1892 accepted as Homoeothrix juliana (Bornet & Flahault ex Gomont) Kirchner, 1898 (synonym)
162. Species Calothrix limbata Harvey, 1863 accepted as Microcoleus limbatus (Harvey) Bornet, 1888 (synonym)
163. Species Calothrix luteofusca C.Agardh, 1827 accepted as Lyngbya luteofusca Gomont, 1892 (synonym)
164. Species Calothrix meneghiniana (Kützing) Kirchner, 1878 accepted as Dichothrix meneghiniana Forti, 1907 (synonym)
165. Species Calothrix obscura P.Crouan & H.Crouan, 1852 accepted as Lyngbya obscura P.Crouan & H.Crouan ex Gomont, 1892 (synonym)
166. Species Calothrix pilosa Harvey ex Bornet & Flahault, 1886 accepted as Scytonematopsis pilosa (Harvey ex Bornet & Flahault) I.Umezaki & M.Watanabe, 1994 (synonym)
167. Species Calothrix plana (Bornet & Flahault) V.I.Poljansky accepted as Isactis plana Thuret ex Bornet & Flahault, 1886
168. Species Calothrix rubra Flahault, 1886 accepted as Homoeothrix rubra P.Crouan & H.Crouan ex Kirchner, 1898 (synonym)
169. Species Calothrix sabulicola (A.Braun ex Kützing) Kirchner, 1878 accepted as Calothrix parietina var. sabulicola Hansgirg, 1892 (synonym)
170. Species Calothrix salina (Kützing) Hansgirg, 1884 accepted as Calothrix parietina var. salina Hansgirg, 1892 (synonym)
171. Species Calothrix semiplena C.Agardh, 1827 accepted as Lyngbya semiplena J.Agardh ex Gomont, 1892 (synonym)
172. Species Calothrix sordida Zanardini ex Kützing, 1849 accepted as Lyngbya sordida Gomont, 1892 (synonym)
173. Species Calothrix symplocoides Reinsch, 1866 accepted as Scytonema hofmanii var. symplocoides Bornet & Flahault, 1886 (synonym)
174. Species Calothrix tenuissima A.Braun, 1865 accepted as Hilsia tenuissima Kirchner, 1878
175. Species Calothrix tomasiniana Kützing, 1843 accepted as Plectonema tomasinianum Bornet ex Gomont, 1893 (synonym)
176. Species Calothrix brebissonii Kützing, 1847 (uncertain)
177. Species Calothrix caulerpae Zanardini, 1851 (uncertain)
178. Species Calothrix clavibasalis Y.Y.Li, 1989 (uncertain, uncertain taxonomic status subjected to verification)
179. Species Calothrix dillwynii Kützing, 1845 (uncertain, uncertain taxonomic status subjected to verification)
180. Species Calothrix distorta (O.F.Müller) C.Agardh, 1824 (uncertain, uncertain taxonomic status subjected to verification)
181. Species Calothrix elongata Zanardini, 1943 (uncertain, uncertain taxonomic status subjected to verification)
182. Species Calothrix evoluta Y.Y.Li, 1989 (uncertain, uncertain taxonomic status subjected to verification)
183. Species Calothrix gracilis Fritsch, 1912 (uncertain)
184. Species Calothrix gypsophila (Kützing) Thuret, 1875 (uncertain)
185. Species Calothrix hosfordii Wolle, 1887 (uncertain, uncertain taxonomic status subjected to verification)
186. Species Calothrix indica Montagne, 1849 (uncertain)
187. Species Calothrix infestans Harvey ex Forti, 1907 (uncertain, uncertain taxonomic status subjected to verification)
188. Species Calothrix muscicola Rabenhorst, 1847 (uncertain)
189. Species Calothrix nemalii Zanardini, 1843 (uncertain, uncertain taxonomic status subjected to verification)
190. Species Calothrix pannosa C.Agardh, 1827 (uncertain)
191. Species Calothrix rhizomatoidea Reinsch, 1866 (uncertain, uncertain taxonomic status subjected to verification)
192. Species Calothrix rivularis Crouan & Crouan, 1868 (uncertain, uncertain taxonomic status subjected to verification)
193. Species Calothrix solitaria Kirchner (uncertain, uncertain taxonomic status subjected to verification)
194. Species Calothrix stellulata Zanardini, 1840 (uncertain)
195. Species Calothrix tenuis (C.Agardh) Ainé, 1863 (uncertain, synonym)
196. Species Calothrix variegata Zanardini, 1840 (uncertain)
197. Species Calothrix violacea Zanardini, 1843 (uncertain, uncertain taxonomic status subjected to verification)

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