1. Species Haslea alexanderi Lobban & Perez in lobban et al., 2020
2. Species Haslea amicorum Herwig, Tiffany, Hargraves & Sterrenburg in Sterrenburg et al., 2015
3. Species Haslea antiqua Fenner †
4. Species Haslea apoloniae Lobban & C.O.Perez in Lobban et al., 2020
5. Species Haslea arculata Lobban & Ashworth in Lobban et al., 2020
6. Species Haslea clevei Hinz, Hargraves & Sterrenburg in Sterrenburg et al., 2015
7. Species Haslea crucigeroides (Hustedt) Simonsen, 1974
8. Species Haslea duerrenbergiana (Hustedt) Sterrenburg in Sterrenburg et al., 2015
9. Species Haslea feriarum Tiffany & Sterrenburg in Sterrenburg et al., 2015
10. Species Haslea fusiformis (Grunow) Lobban & C.O.Perez in Lobban et al., 2020
11. Species Haslea guahanensis Lobban & C.O.Perez in Lobban et al., 2020
12. Species Haslea howeana (Hagelstein) Giffen, 1980
13. Species Haslea karadagensis Davidovich, Gastineau & Mouget, 2012
14. Species Haslea kjellmanii (Cleve) Simonsen
15. Species Haslea meteorou Hinz & Sterrenburg in Sterrenburg et al., 2015
16. Species Haslea nipkowii (Meister) M.Poulin & G.Massé
17. Species Haslea pseudostrearia Massé, Rincé & E.J.Cox, 2001
18. Species Haslea salstonica Massé, Rincé & E.J.Cox, 2000
19. Species Haslea sigma D.Talgatti, E.A.Sar & L.Carvalho Torgan, 2014
20. Species Haslea staurosigmoidea Sterrenburg & Tiffany in Sterrenburg et al., 2015
21. Species Haslea wawrikae (Hustedt) Simonsen, 1974
22. Species Haslea avium Tiffany, Herwig & Sterrenburg in Sterrenburg et al., 2015 accepted as Navicula avium (Tiffany, Herwig et Sterrenburg in Sterrenburg et al.) Yuhang Li & Kuidong Xu, 2017 (uncertain > unassessed)
23. Species Haslea britannica (Hustedt & Aleem) A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Navicula britannica Hustedt & Aleem, 1951 (uncertain > unassessed)
24. Species Haslea crucigera (W.Smith) Simonsen, 1974 accepted as Schizonema cruciger f. cruciger W. Smith, 1856 (uncertain > unassessed)
25. Species Haslea crystallina (Hustedt) Simonsen, 1974 accepted as Navicula crystallina Hustedt, 1961 (uncertain > unassessed)
26. Species Haslea frauenfeldii (Grunow) Simonsen, 1974 accepted as Amphipleura frauenfeldii Grunow, 1863 (uncertain > unassessed)
27. Species Haslea gigantea (Hustedt) Simonsen, 1974 accepted as Navicula gigantea Hustedt, 1961 (uncertain > unassessed)
28. Species Haslea gretharum Simonsen, 1974 (uncertain > unassessed)
29. Species Haslea hyalinissima Simonsen, 1974 (uncertain > unassessed)
30. Species Haslea indica Desikachary & Prema in Desikachary, 1988 (uncertain > unassessed)
31. Species Haslea nautica (Cholnoky) Giffen, 1980 accepted as Navicula nautica Cholnoky, 1963 (uncertain > unassessed)
32. Species Haslea ostrearia (Gaillon) Simonsen, 1974 accepted as Vibrio ostrearius Gaillon, 1820 (uncertain > unassessed)
33. Species Haslea spicula (Hickie) L.Bukhtiyarova, 1995 accepted as Stauroneis spicula Cleve & Grunow, 1880 (uncertain > unassessed)
34. Species Haslea subagnita (Proschkina-Lavrenko) Makarova & Karajeva in Makarova & Akhmetova, 1985 accepted as Navicula subagnita Proschkina-Lavrenko, 1963 (uncertain > unassessed)
35. Species Haslea sulcata (Cleve) Simonsen, 1974 accepted as Stauroneis sulcata Cleve, 1881 (uncertain > unassessed)
36. Species Haslea trompii (Cleve) Simonsen, 1974 accepted as Navicula trompii var. trompii Cleve, 1900 (uncertain > unassessed)
37. Species Haslea tsukamotoi Sterrenburg & Hinz in Sterrenburg et al., 2015 accepted as Navicula tsukamotoi (Sterrenburg & Hinz) Yuhang Li et Kuidong Xu in Li et al., 2017 (uncertain > unassessed)
38. Species Haslea vitrea (Cleve) Simonsen, 1974 accepted as Pleurosigma vitrea var. vitrea Cleve in Cleve & Moller, 1879 (uncertain > unassessed)

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