• Schizothrix Huys, 1992 [Family: Leptastacidae]
• Schizothrix Kützing ex Gomont, 1892 [Family: Schizotrichaceae]
• Schizothrix acuminata (N.L. Gardner) Drouet
• Schizothrix acutissima Drouet
• Schizothrix adunca Schwabe, 1960
• Schizothrix aeruginea (Rabenhorst) Desikachary, 1959 accepted as Leptolyngbya aeruginea (Kützing ex Hansgirg) Komárek, 2001
• Schizothrix affinis Lemmermann, 1904
• Schizothrix aikenensis Wolle ex Philson
• Schizothrix albaniensis Drouet, 1960 accepted as Symplocastrum albaniense (Drouet) Anagnostidis, 2001
• Schizothrix antarctica F.E. Fritsch, 1917
• Schizothrix arenaria Gomont, 1892
• Schizothrix arnottii Frémy, 1923
• Schizothrix atacamensis Schwabe
• Schizothrix aurantiaca Kützing, 1849 accepted as Symplocastrum aurantiacum (Hansgirg ex Hansgirg) Anagnostidis, 2001
• Schizothrix beccarii Gomont, 1892
• Schizothrix bioretii Frémy, 1924
• Schizothrix bosniaca (Hansgirg) Forti ex Geitler, 1932
• Schizothrix braunii Gomont, 1892
• Schizothrix calcarea Gardner, 1927
• Schizothrix calcicola (C. Agardh) Gomont ex Gomont, 1892
• Schizothrix calcicola (C. Agardh) Gomont, 1890 accepted as Schizothrix calcicola (C. Agardh) Gomont ex Gomont, 1892
• Schizothrix calida De Wildeman, 1897
• Schizothrix californica Drouet
• Schizothrix cavanillesii P. González, 1945
• Schizothrix chalybea (Kützing) Gomont, 1892
• Schizothrix codiiformis (Giaccone) Giaccone
• Schizothrix confervae (Kützing) Desikachary, 1959
• Schizothrix constricta Copeland, 1936
• Schizothrix coriacea (Kützing) Gomont, 1892
• Schizothrix cresswellii (Harvey) Gomont accepted as Schizothrix creswellii (Harvey) Harvey, 1847
• Schizothrix cresswellii Harvey, 1846
• Schizothrix creswellii (Harvey) Harvey, 1847
• Schizothrix ctenata (Mielke, 1982)
• Schizothrix cuspidata (W. West & G.S. West) W. West & G.S. West, 1896
• Schizothrix cyanea Nägeli ex Geitler, 1925
• Schizothrix dailyi Drouet
• Schizothrix delicatissima W. West & G.S. West, 1897
• Schizothrix diplosiphon (Woronichin) Anagnostidis, 2001
• Schizothrix ecalcarea Gardner ex Geitler, 1932
• Schizothrix elongata W. West & G.S. West, 1897
• Schizothrix epilithica (Ercegovic) Anagnostidis, 2001
• Schizothrix epiphytica F.E. Fritsch
• Schizothrix ericetorum Lemmermann, 1910
• Schizothrix facilis (Skuja) Anagnostidis, 2001
• Schizothrix fasciculata Nägeli ex Gomont, 1892
• Schizothrix flammea Komárek & M. Watanabe
• Schizothrix fragilis (Kützing) Gomont, 1892
• Schizothrix friesii (C. Agardh) Gomont, 1890
• Schizothrix friesii Gomont ex Gomont, 1892 accepted as Symplocastrum friesii (Gomont ex Gomont) Kirchner, 1898
• Schizothrix fritschii Anand, 1937
• Schizothrix funalis W. West & G.S. West, 1896
• Schizothrix funicilus Voronichin
• Schizothrix furcata Rabenhorst ex Gomont
• Schizothrix fuscescens Kützing, 1843
• Schizothrix gebeleinii Golubic & Browne, 1996
• Schizothrix giuseppei Drouet, 1942
• Schizothrix gomontii Weber van Bosse, 1913
• Schizothrix gracilis Golubic, 1973
• Schizothrix grunoviana Elenkin, 1949 accepted as Symplocastrum grunovianum (Elenkin) Anagnostidis, 2001
• Schizothrix guiseppei Drouet
• Schizothrix hancockii Drouet, 1936 accepted as Phormidium hancockii (Drouet) Drouet, 1942
• Schizothrix hawaiensis Lemmermann
• Schizothrix hawaiiensis Lemmermann, 1905 accepted as Inactis hawaiiensis (Lemmermann) Forti, 1907
• Schizothrix helva Frémy, 1938
• Schizothrix heufleri Grunow, 1865
• Schizothrix hirschii Drouet, 1959
• Schizothrix hyalina Kützing ex Hansgirg
• Schizothrix incrustans (Ercegovic) Anagnostidis, 2001
• Schizothrix kerguelensis Wille, 1901
• Schizothrix kialingensis Jao, 1944
• Schizothrix kwangsiensis Jao, 1944
• Schizothrix lacustris (A. Braun) Gomont, 1892
• Schizothrix lamyi Gomont, 1891
• Schizothrix lardacea (Cesati) Gomont, 1892
• Schizothrix lateritia (Kützing) Gomont, 1892
• Schizothrix lenormandiana Gomont, 1892
• Schizothrix litoralis Hansgirg ex Geitler, 1932
• Schizothrix longearticulata (Geitler) Anagnostidis, 2001
• Schizothrix longiarticulata Gardner, 1927
• Schizothrix lutea Frémy, 1930
• Schizothrix luteola C. Sarthou, Y. Thérézien & A. Couté
• Schizothrix macbridei Drouet
• Schizothrix martima Yoneda
• Schizothrix mascarenica Gomont, 1893
• Schizothrix mellea N.L. Gardner, 1927
• Schizothrix mexicana Gomont, 1892
• Schizothrix minor (Gardner) Anagnostidis, 2001
• Schizothrix minuta (Hansgirg ex Gomont) Forti ex Geitler, 1932
• Schizothrix muelleri Nägeli ex Gomont, 1892
• Schizothrix muelleri Nägeli, 1849 accepted as Symplocastrum muelleri (Nägeli ex Gomont) Anagnostidis, 2001
• Schizothrix naegelii (Kützing) Geitler, 1925 accepted as Symplocastrum naegelii (Kützing ex Gomont) Anagnostidis, 2001
• Schizothrix nasri Frémy, 1938
• Schizothrix nasrii Frémy
• Schizothrix natans W. West & G.S. West, 1897
• Schizothrix nigrovaginata (Hansgirg) Geitler, 1932 accepted as Schizothrix nigrovaginata Hansgirg ex Forti, 1907
• Schizothrix nigrovaginata Hansgirg ex Forti, 1907
• Schizothrix notarisii (Meneghini) Sampaio, 1964 accepted as Porphyrosiphon notarisii Kützing ex Gomont, 1892 accepted as Planktothrix perornata (Skuja) Anagnostidis & Komárek, 1988
• Schizothrix nullipora (Grun.) Geitler, 1925
• Schizothrix pallida (Kützing) Geitler, 1932
• Schizothrix panniformis Rabenhorst