• Leptothrix (Dumortier) Dumortier, 1868 accepted as Hordelymus (Jessen) Harz, 1885 [Family: Poaceae]
• Leptothrix Heikertinger & Csiki, 1940 accepted as Orthaltica Crotch, 1873 [Family: Chrysomelidae]
• Leptothrix Heylaerts, 1892 (uncertain) [Family: Lepidoptera (awaiting allocation)]
• Leptothrix Kützing, 1843 (Approved Lists, 1980) [Family: Burkholderiales incertae sedis]
• Leptothrix Menge, 1869 [Family: Linyphiidae]
• Leptothrix aeruginea Kützing, 1843 accepted as Leptolyngbya aeruginea (Kützing ex Hansgirg) Komárek, 2001
• Leptothrix aeruginosa Kützing
• Leptothrix amethystea Kützing
• Leptothrix arctica Foslie
• Leptothrix braunii Kützing
• Leptothrix brevissima Kützing, 1843 accepted as Heteroleibleinia brevissima (Hansgirg) Anagnostidis & Komárek, 1988
• Leptothrix buccalis Robin, 1853 accepted as Leptotrichia buccalis (Robin 1853) Trevisan, 1879
• Leptothrix bullosa (Wolle) Wolle
• Leptothrix caespitosa (Kützing) Rabenhorst
• Leptothrix calcicola (C. Agardh) Kützing, 1843 accepted as Schizothrix calcicola (C. Agardh) Gomont ex Gomont, 1892
• Leptothrix cholodnii Mulder & van Veen, 1963
• Leptothrix compacta Kützing, 1843 accepted as Leptolyngbya compacta (Kützing ex Hansgirg) Komárek, 2001
• Leptothrix contexta Montagne
• Leptothrix coriacea Kützing, 1843 accepted as Schizothrix coriacea (Kützing) Gomont, 1892
• Leptothrix crassa Cholodny, 1924 accepted as Leptothrix discophora (ex Schwers 1912) Spring et al., 1997
• Leptothrix criniformis Massalongo
• Leptothrix curvata Meneghini
• Leptothrix cyanea Kützing
• Leptothrix dalmatica Kützing, 1849 accepted as Lyngbya subolivacea Hansgirg ex Gomont, 1892
• Leptothrix dictyothrix Kützing, 1849 accepted as Lyngbya dictyothrix (Kützing) Gomont, 1892
• Leptothrix discophora (ex Schwers 1912) Spring et al., 1997
• Leptothrix discophora (Schwers, 1912) Dorff, 1934 accepted as Leptothrix discophora (ex Schwers 1912) Spring et al., 1997
• Leptothrix dubia Nägeli, 1849 accepted as Symploca dubia Nägeli ex Gomont, 1892
• Leptothrix epiphytica (Hieronymus) Dorff
• Leptothrix fodinarum Rabenhorst, 1847
• Leptothrix fontana Kützing, 1843 accepted as Leptolyngbya fontana (Kützing ex Hansgirg) Komárek, 2001
• Leptothrix foveolarum Montagne, 1849 accepted as Leptolyngbya foveolara (Montagne ex Gomont) Anagnostidis & Komárek, 1988
• Leptothrix gigantea W. Miller
• Leptothrix gloeophila Kützing, 1847 accepted as Leptolyngbya gloeophila (Kützing ex Hansgirg) Komárek, 2001
• Leptothrix graveolens P.L. Crouan & H.M. Crouan
• Leptothrix hardyi (Blackwall, 1850)
• Leptothrix hegetschweileri (Nägeli) Kützing, 1849 accepted as Lyngbya rufescens (Kützing) Kirchner ex Hansgirg, 1892
• Leptothrix herbacea Kützing
• Leptothrix hinnulea (Wolle) Wolle, 1887 accepted as Hypheothrix hinnulea (Wolle) Forti, 1907
• Leptothrix hyalina Reinsch
• Leptothrix ianthina (Montagne) Kützing
• Leptothrix inextricabilis Zanardini ex Frauenfeld, 1855
• Leptothrix insectorum Robin
• Leptothrix investiens A. Braun ex Kützing
• Leptothrix jadertina (Meneghini) Kützing, 1849 accepted as Leptolyngbya jadertina (Kützing ex Hansgirg) Anagnostidis, 2001
• Leptothrix kermesina Kützing, 1847 accepted as Schizothrix lateritia (Kützing) Gomont, 1892
• Leptothrix kohleri Nägeli ex Kützing
• Leptothrix kuehniana Rabenhorst, 1853 accepted as Lyngbya kuehniana (Rabenhorst) Migula, 1907
• Leptothrix kuetzingiana Nägeli, 1849 accepted as Lyngbya kuetzingiana (Nägeli) Hansgirg, 1887
• Leptothrix lacustris Nägeli
• Leptothrix lamellosa Kützing
• Leptothrix laminosa (C. Agardh) Rabenhorst, 1847 accepted as Leptolyngbya laminosa (Gomont) Anagnostidis & Komárek, 1988
• Leptothrix lanugo Kützing
• Leptothrix lardacea Cesati, 1857 accepted as Schizothrix lardacea (Cesati) Gomont, 1892
• Leptothrix lateritia Kützing, 1849 accepted as Lyngbya lateritia (Kützing) Hansgirg ex Hansgirg, 1892
• Leptothrix levissima Kalbe, Keil & Theile
• Leptothrix lopholea Dorff, 1934
• Leptothrix lubrica Ardissone, 1877
• Leptothrix lurida Kützing, 1849
• Leptothrix lutea Kützing
• Leptothrix lutescens Kützing, 1843 accepted as Phormidium lutescens (Hansgirg) Anagnostidis & Komárek, 1988 accepted as Lyngbya lutescens Hansgirg, 1892
• Leptothrix major Dorff
• Leptothrix mamillosa Meneghini, 1849
• Leptothrix marina Kützing, 1845
• Leptothrix meneghinii Kützing, 1845 accepted as Hypheothrix coriacea (Kützing) Kützing, 1849 accepted as Schizothrix coriacea (Kützing) Gomont, 1892
• Leptothrix meyeri D. Ellis
• Leptothrix miraculosa Kützing
• Leptothrix mobilis Spring et al., 1997
• Leptothrix mucosa Nave
• Leptothrix muralis Kützing, 1843 accepted as Hypheothrix muralis (Kützing) Richter ex Gomont, 1892
• Leptothrix obscura Roemer
• Leptothrix ochracea (Leiblein) Kützing
• Leptothrix ochracea (Roth, 1797) Kützing, 1843
• Leptothrix olivacea Kützing
• Leptothrix olivacea Kützing, 1847 accepted as Leptolyngbya olivacea (Kützing ex Hansgirg) Anagnostidis, 2001
• Leptothrix parasitica Kützing
• Leptothrix parietina A. Braun accepted as Symploca parietina A. Braun ex Gomont, 1892
• Leptothrix pseudovacuolata (Perfiliev) Dorff
• Leptothrix punctiformis Zanardini
• Leptothrix purpurascens Kützing, 1847 accepted as Leptolyngbya purpurascens (Gomont ex Gomont) Anagnostidis & Komárek, 1988
• Leptothrix pusilla Rabenhorst, 1865 accepted as Heteroleibleinia pusilla (Rabenhorst) Compère, 1985
• Leptothrix radians Kützing
• Leptothrix reticulata Nägeli
• Leptothrix rigidula (Kützing) Kützing, 1845
• Leptothrix robusta Reinsch, 1890
• Leptothrix rosea Kützing, 1847 accepted as Schizothrix lateritia (Kützing) Gomont, 1892
• Leptothrix roseola P.L. Crouan & H.M. Crouan
• Leptothrix rubra P.L. Crouan & H.M. Crouan
• Leptothrix rufescens Kützing, 1843 accepted as Lyngbya rufescens (Kützing) Kirchner ex Hansgirg, 1892
• Leptothrix skujae Beger
• Leptothrix spissa Rabenhorst
• Leptothrix subtilissima Hansgirg
• Leptothrix subtilissima Kützing, 1843 accepted as Leptolyngbya subtilissima (Kützing ex Hansgirg) Komárek, 2001
• Leptothrix symplocoides G. Dickie
• Leptothrix tenax (Wolle) Wolle, 1887 accepted as Schizothrix tenax (Wolle) Desikachary, 1959
• Leptothrix tenuissima Nägeli, 1849 accepted as Leptolyngbya hansgirgiana Komárek, 2001
• Leptothrix tenuissima Skuja
• Leptothrix thermalis (Molisch) Dorff
• Leptothrix tiburtina Cohn, 1864
• Leptothrix tinctoria (C. Agardh) Kützing