Cystopleura argus var. alpestris (W.Smith) De Toni, 1892 accepted as
Epithemia alpestris W.Smith, 1853 (new combination reference)
Cystopleura gibberula var. producta (Grunow) Gutwinski, 1899 accepted as
Epithemia gibberula var. producta Grunow, 1862 (new combination reference)
Cystopleura turgida var. westermannii (Ehrenberg) De Toni, 1892 accepted as
Navicula westermannii Ehrenberg, 1835 (new combination reference)
Cystopleura zebra var. porcellus (Kützing) Gutwinski, 1899 accepted as
Epithemia porcellus Kützing, 1844 (new combination reference)
Cystopleura zebra var. saxonica (Kützing) De Toni, 1892 accepted as
Epithemia saxonica Kützing, 1844 (new combination reference)
Synedra sceptrum f. fossilis Gutwinski, 1899 (original description)
Synedra sceptrum var. mesolepta Gutwinski, 1899 (original description)