| Fragilaria granulata G. Karst., 1907 |
| Fragilaria hyalina (Kütz.) Grunow ex Van Heurck, 1862 |
| Fragilaria intermedia (Grunow) Grunow, 1881 |
| Fragilaria islandica Grunow ex Van Heurck, 1881 |
| Fragilaria lapponica Grunow, 1881 |
| Fragilaria nana Steem.Niels., 1935 |
| Fragilaria obtusa Hust., 1956 |
| Fragilaria oceanica Cleve, 1873 |
| Fragilaria pinnata Ehrenb., 1843 |
| Fragilaria radians (Kütz.) D.M. Williams & Round, 1987 |
| Fragilaria silendum M.H. Hohn & Hellerman, 1966 |
| Fragilaria socia (J.H. Wallace) Lange-Bert., 1980 |
| Fragilaria tabulata (C. Agardh) Lange-Bert., 1981 |
| Fragilaria tabulata var. tabulata (C. Agardh) Lange-Bert., 1981 |
| Fragilaria tenera (W. Sm.) Lange-Bert., 1980 |
| Fragilaria ulna (Nitzsch) Lange-Bert., 1981 |
| Fragilaria ungeriana Grunow, 1863 |
| Fragilaria vaucheriae (Kütz.) Petersen, 1938 |
| Fragilaria venter Ehrenb., 1854 |
| Fragilaria virescens Ralfs, 1843 |