1. Species Fragilaria alpestris Krasske ex Hustedt, 1931
2. Species Fragilaria amphicephaloides Lange-Bertalot, 2013
3. Species Fragilaria brevistriata Grunow, 1885
4. Species Fragilaria capucina Desmazières, 1830
5. Species Fragilaria construens (Ehrenberg) Grunow, 1862
6. Species Fragilaria crotonensis Kitton, 1869
7. Species Fragilaria hyalina (Kützing) Grunow ex Van Heurck, 1880
8. Species Fragilaria intermedia (Grunow) Grunow in Van Heurck, 1881
9. Species Fragilaria islandica Grunow ex Van Heurck, 1881
10. Species Fragilaria istvanffyi Pantocsek, 1902
11. Species Fragilaria radians (Kützing) D.M.Williams & Round, 1987
12. Species Fragilaria striatula Lyngbye, 1819
13. Species Fragilaria biceps (Kützing) Lange-Bertalot, 1991 accepted as Ulnaria biceps (Kützing) P.Compère, 2001 accepted as Synedra biceps f. biceps Kützing, 1844 (synonym)
14. Species Fragilaria harrisonii (W.Smith) Grunow, 1862 accepted as Staurosirella leptostauron (Ehrenberg) D.M.Williams & Round, 1987 accepted as Biblarium leptostauron Ehrenberg, 1854 (synonym)
15. Species Fragilaria lapponica Grunow, 1881 accepted as Staurosirella lapponica (Grunow) D.M.Williams & Round, 1987 accepted as Fragilaria lapponica f. lapponica Grunow in Van Heurck, 1881 (Basionym)
16. Species Fragilaria leptostauron (Ehrenberg) Hustedt, 1931 accepted as Staurosirella leptostauron (Ehrenberg) D.M.Williams & Round, 1987 accepted as Biblarium leptostauron Ehrenberg, 1854 (Synonym)
17. Species Fragilaria mutabilis (W.Smith) Grunow, 1862 accepted as Staurosirella pinnata var. intercedens (Grunow) P.B.Hamilton, 1994 accepted as Fragilaria mutabilis var. intercedens Grunow, 1881 (synonym)
18. Species Fragilaria nitzschioides Grunow, 1881 accepted as
19. Species Fragilaria oceanica Cleve, 1873 accepted as Fragilariopsis oceanica (Cleve) Hasle, 1965 accepted as Fragilaria oceanica f. oceanica Cleve, 1873 (basionym)
20. Species Fragilaria parasitica (W.Smith) Grunow, 1881 accepted as Pseudostaurosira parasitica (W.Smith) Morales, 2003 (synonym)
21. Species Fragilaria vaucheriae (Kützing) J.B.Petersen, 1938 accepted as Fragilaria capucina var. vaucheriae (Kützing) Lange-Bertalot, 1980 accepted as Exilaria vaucheriae Kützing, 1833 (synonym)
22. Species Fragilaria venter Ehrenberg, 1854 accepted as Staurosira venter (Ehrenberg) Cleve & Moeller, 1879 accepted as Fragilaria venter var. venter Ehrenberg, 1854 (synonym)
23. Species Fragilaria virescens Ralfs, 1843 accepted as Fragilariforma virescens (Ralfs) D.M.Williams & Round, 1988 (basionym)
24. Species Fragilaria acus (Kützing) Lange-Bertalot in Krammer & Lange-Bertalot, 2000 (uncertain > unassessed)
25. Species Fragilaria atomus Hustedt, 1931 (uncertain > unassessed)
26. Species Fragilaria berolinensis (Lemmermann) Lange-Bertalot, 1993 accepted as Synedra berolinensis var. berolinensis Lemmermann, 1900 (uncertain > unassessed)
27. Species Fragilaria binalis Ehrenberg, 1854 (uncertain > unassessed)
28. Species Fragilaria binodis Ehrenberg, 1854 (uncertain > unassessed)
29. Species Fragilaria capitata (Ehrenberg) Lange-Bertalot, 1980 accepted as Synedra capitata f. capitata Ehrenberg, 1836 (uncertain > unassessed)
30. Species Fragilaria cylindrus Grunow, 1883 (uncertain > unassessed)
31. Species Fragilaria dilatata (Brébisson) Lange-Bertalot, 1993 accepted as Frustulia dilatata Brébisson, 1838 (uncertain > unassessed)
32. Species Fragilaria fasciculata (C.Agardh) Lange-Bertalot, 1980 accepted as Tabularia fasciculata (C.Agardh) D.M.Williams & Round, 1986 (uncertain > unassessed, homotypic synonym)
33. Species Fragilaria gracilis Østrup, 1910 (uncertain > unassessed)
34. Species Fragilaria heidenii Østrup, 1910 accepted as Staurosira inflata (Heiden) A.Rusanov, A´cs, E. Morales & Ector in Rusanov et al., 2018 (uncertain > unassessed)
35. Species Fragilaria hiemalis (Roth) Lyngbye, 1819 (uncertain > unassessed)
36. Species Fragilaria inflata Pantocsek, 1902 (uncertain > unassessed)
37. Species Fragilaria lancettula Schumann, 1867 (uncertain > unassessed)
38. Species Fragilaria mesodon Ehrenberg, 1839 (uncertain > unassessed)
39. Species Fragilaria mesolepta Rabenhorst, 1861 (uncertain > unassessed)
40. Species Fragilaria nana (Meister) Lange-Bertalot, 1980 accepted as Synedra nana f. nana Meister, 1912 (uncertain > unassessed)
41. Species Fragilaria nanana Lange-Bertalot, 1993 (uncertain > unassessed)
42. Species Fragilaria pectinalis (O.F.Müller) Lyngbye, 1819 (uncertain > unassessed)
43. Species Fragilaria pinnata Ehrenberg, 1843 (uncertain > unassessed)
44. Species Fragilaria pulchella (Ralfs ex Kützing) Lange-Bertalot, 1980 accepted as Exilaria pulchella Ralfs ex Kützing, 1844 (uncertain > unassessed)
45. Species Fragilaria schulzii C.Brockmann, 1950 (uncertain > unassessed)
46. Species Fragilaria toxoneides (Castracane) Lange-Bertalot, 1980 accepted as Synedra toxoneides var. toxoneides Castracane, 1880 (uncertain > unassessed)
47. Species Fragilaria trigibba Pantocsek, 1902 (uncertain > unassessed)
48. Species Fragilaria ulna (Nitzsch) Lange-Bertalot, 1980 accepted as Bacillaria ulna Nitzsch, 1817 (uncertain > unassessed)
49. Species Fragilaria unipunctata Lyngbye, 1819 (uncertain > unassessed)
50. Species Fragilaria utermoehlii (Hustedt) Lange-Bertalot, 1991 accepted as Synedra utermoehlii Hustedt, 1932 (uncertain > unassessed)
51. Species Fragilaria virescens (Grunow) Skabichevskii, 1960 accepted as Fragilaria virescens f. subsalina Grunow in Van Heurck, 1881 (uncertain > unassessed)
52. Species Fragilaria zasuminensis Cabejszekówna, 1937 (uncertain > unassessed)

marine, brackish, fresh, terrestrial

recent + fossil

Lyngbye, H.C. (1819). Tentamen Hydrophytologiae Danicae Continens omnia Hydrophyta Cryptogama Daniae, Holsatiae, Faeroae, Islandiae, Groenlandiae hucusque cognita, Systematice Disposita, Descripta et iconibus illustrata, Adjectis Simul Speciebus Norvegicis. Hafniae., 248 pp., 70 pls., available online at https://www.biodiversitylibrary.org/page/5220228 [details] 

Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2024). DiatomBase. Fragilaria H.C. Lyngbye, 1819. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024) European Register of Marine Species at: http://marbef.org/data/aphia.php?p=taxdetails&id=149028 on 2024-12-23

Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024). European Register of Marine Species. Fragilaria H.C. Lyngbye, 1819. Accessed at: https://vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=149028 on 2024-12-23

[taxonomic tree]