• Haslea R. Simonsen, 1974
• Haslea alexanderi Lobban & Perez in lobban et al., 2020
• Haslea amicorum Herwig, Tiffany, Hargraves & Sterrenburg in Sterrenburg et al., 2015
• Haslea antiqua Fenner †
• Haslea apoloniae Lobban & C.O.Perez in Lobban et al., 2020
• Haslea arculata Lobban & Ashworth in Lobban et al., 2020
• 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
• Haslea britannica (Hustedt & Aleem) A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Navicula britannica Hustedt & Aleem, 1951
• Haslea clevei Hinz, Hargraves & Sterrenburg in Sterrenburg et al., 2015
• Haslea crucigera (W.Smith) Simonsen, 1974 accepted as Schizonema cruciger f. cruciger W. Smith, 1856
• Haslea crucigeroides (Hustedt) Simonsen, 1974
• Haslea crucigeroides var. australis Cefarelli, Simonato & Mascioni in Cefarelli et al., 2018
• Haslea crucigeroides var. densestriata Cardinal, Poulin & Bérard-Therriault, 1984 (uncertain > unassessed)
• Haslea crystallina (Hustedt) Simonsen, 1974 accepted as Navicula crystallina Hustedt, 1961
• Haslea duerrenbergiana (Hustedt) Sterrenburg in Sterrenburg et al., 2015
• Haslea feriarum Tiffany & Sterrenburg in Sterrenburg et al., 2015
• Haslea frauenfeldii (Grunow) Simonsen, 1974 accepted as Amphipleura frauenfeldii Grunow, 1863
• Haslea fusiformis (Grunow) Lobban & C.O.Perez in Lobban et al., 2020
• Haslea gigantea (Hustedt) Simonsen, 1974 accepted as Navicula gigantea Hustedt, 1961
• Haslea gigantea var. tenuis von Stosch, 1985 (uncertain > unassessed)
• Haslea gretharum Simonsen, 1974 (uncertain > unassessed)
• Haslea guahanensis Lobban & C.O.Perez in Lobban et al., 2020
• Haslea howeana (Hagelstein) Giffen, 1980
• Haslea hyalinissima Simonsen, 1974 (uncertain > unassessed)
• Haslea indica Desikachary & Prema in Desikachary, 1988 (uncertain > unassessed)
• Haslea karadagensis Davidovich, Gastineau & Mouget, 2012
• Haslea kjellmanii (Cleve) Simonsen
• Haslea kjelmanii (Cleve) Simonsen, 1974 (uncertain > unassessed)
• Haslea kjelmanii var. subconstricta (Grunow in Cleve) Desikachary & Gowthaman in Desikachary, Gowthaman & Latha, 1987 accepted as Navicula vegae var. subconstricta Grunow in Cleve, 1883
• Haslea major (Heiden) Simonsen, 1992 accepted as Navicula trompii var. major Heiden
• Haslea meteorou Hinz & Sterrenburg in Sterrenburg et al., 2015
• Haslea nautica (Cholnoky) Giffen, 1980 accepted as Navicula nautica Cholnoky, 1963
• Haslea nipkowii (Meister) M.Poulin & G.Massé
• Haslea ostrearia (Gaillon) Simonsen, 1974 accepted as Vibrio ostrearius Gaillon, 1820
• Haslea pseudostrearia Massé, Rincé & E.J.Cox, 2001
• Haslea salstonica Massé, Rincé & E.J.Cox, 2000
• Haslea sigma D.Talgatti, E.A.Sar & L.Carvalho Torgan, 2014
• Haslea silbo Gastineau, Hansen & Mouget in Gastineau et al. 2021
• Haslea spicula (Hickie) L.Bukhtiyarova, 1995 accepted as Stauroneis spicula Cleve & Grunow, 1880
• Haslea staurosigmoidea Sterrenburg & Tiffany in Sterrenburg et al., 2015
• Haslea subagnita (Proschkina-Lavrenko) Makarova & Karajeva in Makarova & Akhmetova, 1985 accepted as Navicula subagnita Proschkina-Lavrenko, 1963
• Haslea sulcata (Cleve) Simonsen, 1974 accepted as Stauroneis sulcata Cleve, 1881
• Haslea trompii (Cleve) Simonsen, 1974 accepted as Navicula trompii var. trompii Cleve, 1900
• 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
• Haslea vitrea (Cleve) Simonsen, 1974 accepted as Pleurosigma vitrea var. vitrea Cleve in Cleve & Moller, 1879
• Haslea wawrikae (Hustedt) Simonsen, 1974