Ctenophora pulchella (Ralfs ex Kützing) D. M. Williams & Round 1986
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Ctenophora (Grunow) D.M.Williams & Round, 1986)
Ctenophora pulchella var. longissima (W. Smith) Schönfeldt 1907
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Synedra biceps f. biceps)
Diatoma crystallinum C. A. Agardh 1824
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Diatoma J.B.M.Bory de Saint-Vincent, 1824)
Epithemia capitata (Ehrenberg) Brébisson 1838
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Synedra capitata f. capitata)
Synedra amphicephala var. austriaca (Grunow) Hustedt 1932
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Fragilaria amphicephaloides Lange-Bertalot, 2013)
Synedra antarctica Heiden & Kolbe 1928
Doubtful according to GBIF classification (Possible variant of Synedra antarctica M.Peragallo, 1921)
Synedra arctica Grunow 1862
Doubtful according to GBIF classification (Possible variant of Synedra arctica O'Meara, 1874)
Synedra arcuata Naegeli 1849
Doubtful according to GBIF classification (Possible variant of Synedra arcuata (Østrup) A.Cleve)
Synedra arcuata Wigand 1860
Doubtful according to GBIF classification (Possible variant of Synedra arcuata (Østrup) A.Cleve)
Synedra armoricana Kützing 1844
Doubtful according to GBIF classification (Possible variant of Synedra armoricana H.Peragallo, 1915)
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Tabularia fasciculata (C.Agardh) D.M.Williams & Round)