| Fragilaria mexicana (Ehrenb.) De Toni, 1892 |
| Fragilaria nana Steem.Niels., 1935 |
| Fragilaria obtusa Hust., 1956 |
| Fragilaria oceanica Cleve, 1873 |
| Fragilaria pectinalis (O.F. Müller) Lyngbye, 1819 |
| Fragilaria perdelicatissima Lange-Bert. & Van de Vijver, 2014 |
| Fragilaria perminuta (Grunow, 2000 |
| Fragilaria pinnata Ehrenb., 1843 |
| Fragilaria radians (Kütz.) D.M. Williams & Round, 1987 |
| Fragilaria rhabdosoma Ehrenb., 1832 |
| Fragilaria rumpens (Kütz.) G.W.F.Carlson, 1913 |
| Fragilaria silendum M.H. Hohn & Hellerman, 1966 |
| Fragilaria socia (J.H. Wallace) Lange-Bert., 1980 |
| Fragilaria striatula Lyngbye, 1819 |
| Fragilaria synegrotesca Lange-Bert., 1993 |
| Fragilaria tabulata (C. Agardh) Lange-Bert., 1981 |
| Fragilaria tarahumara Beraldi, Cevallos & Chacón-Baca, 2004 |
| Fragilaria tenera (W. Sm.) Lange-Bert., 1980 |
| Fragilaria tenera var. nanana (H.Lange-Bert.) H.Lange-Bert. & S.Ulrich, 2014 |
| Fragilaria ulna (Nitzsch) Lange-Bert., 1981 |