Doubtful according to GBIF classification (Possible variant of Fragilaria tenuis Agardh, 1832)
Fragilaria tenuistriata
Doubtful according to GBIF classification (Possible variant of Fragilaria tenuistriata Østrup, 1910)
Fragilaria undulata Corda 1835
Doubtful according to GBIF classification (Possible variant of Fragilaria undulata Cramer, 1863)
Fragilaria undulata Ehrenberg 1854
Doubtful according to GBIF classification (Possible variant of Fragilaria undulata Cramer, 1863)
Fragilariforma acidobiontica (D. F. Charles) D. M. Williams & Round 1988
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Fragilariforma Williams & Round)
Fragilariforma hungarica (Pantocsek) Hamilton 1992
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Fragilaria hungarica var. hungarica)
Fragilariforma javanica (Hustedt) C. E. Wetzel, E. Morales & L. Ector
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Fragilariforma Williams & Round)
Fragilariforma neoproducta (Lange-Bert.) D. M. Williams & Round
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Staurosira neoproducta (Lange-Bertalot) Chudaev & Gololobova, 2012)
Pseudostaurosira brevistriata (Grunow) D. M. Williams & Round
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Pseudostaurosira D.M.Williams & F.E.Round, 1988)
Staurosira alpestris (Krasske ex Hust.) Van de Vijver
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Staurosira C.G.Ehrenberg, 1843)
Staurosira hyemalis (Kützing) Petit 1878
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Staurosira C.G.Ehrenberg, 1843)