Achnanthepyla gainii accepted as Achnanthepyla gainii var. gainii Perag., 1921 accepted as Achnanthes gainii (M. Peragallo) Mann, 1937
Achnanthepyla gainii var. gainii Perag., 1921 accepted as Achnanthes gainii (M. Peragallo) Mann, 1937
Belonastrum berolinensis (Lemmermann) Round & Maidana, 2001 accepted as Synedra berolinensis var. berolinensis Lemmermann, 1900
Diatoma elongatum (Agardh) Skabichevskii, 1960 accepted as Diatoma tenue C. Agardh, 1812
Diatoma elongatum var. ehrenbergii (Kützing) Van Heurck, 1880-1885 accepted as Diatoma ehrenbergii Kützing, 1844
Diatoma gracillimum Hantzsch in Rabenhorst, 1861 (uncertain > unassessed )
Diatoma grande W. Smith, 1855 (uncertain > unassessed )
Dicladia antennata Ehrenberg, 1844 † (uncertain > unassessed )
Discoplea oligactis Ehrenberg, 1854 (uncertain > unassessed )
Gaillonella sulcata Weisse, 1854 (uncertain > unassessed )
Himantidium minus Kützing, 1844 (uncertain > unassessed )
Microneis minutissima (Kützing) Cleve, 1895 accepted as Achnanthidium minutissimum (Kützing) Czarnecki, 1994 accepted as Achnanthes minutissima var. minutissima Kützing, 1833
Microneis minutissima (Kützing) Meister, 1912 accepted as Achnanthes minutissima var. minutissima Kützing, 1833
Microneis minutissima var. cryptocephala (Grunow) Cleve, 1895 accepted as Achnanthes minutissima var. cryptocephala Grunow, 1880
Moelleria antarctica Castracane, 1886 accepted as Neomoelleria antarctica (Castrac.) S.Blanco & C.E.Wetzel, 2016
Monema prostratum Berkeley, 1832 (uncertain > unassessed )
Neomoelleria antarctica (Castrac.) S.Blanco & C.E.Wetzel, 2016
Orthosira roeseana (Rabenhorst) Pfitzer, 1871
Stauronella indubitabilis H. Lange-Bertalot & S.I. Genkal, 1999 (uncertain > unassessed )
Symbolophora microtrias Ehrenberg, 1844 (uncertain > unassessed )