Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pinnularia trigonocephala f. trigonocephala)
Navicula viridis var. distinguenda (Cleve) Frenguelli 1923
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pinnularia viridis var. distinguenda Cleve, 1891)
Navicula viridis var. distinguenda (Cleve) Tempère & Peragallo 1911
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pinnularia viridis var. distinguenda Cleve, 1891)
Navicula viridis var. leptogongyla (Ehrenberg) Fricke 1902
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Caloneis ventricosa (Ehrenb.) F.Meister)
Pinnularia acrosphaeria Rabenhorst 1853
Doubtful according to GBIF classification (Possible variant of Pinnularia acrosphaeria W.Sm.)
Pinnularia angusta (Cleve) Krammer
Doubtful according to GBIF classification (Possible variant of Pinnularia angusta K.E.Lohman, 1957)
Pinnularia bacillaris Ehrenberg 1854
Doubtful according to GBIF classification (Possible variant of Pinnularia bacillaris Cleve-Euler, 1934)
Pinnularia bicapitata var. interrupta (W. Smith) L. Dippel 1905
Homotypic synonym according to GBIF classification (Originally found in sources as synonym of Pinnularia interrupta f. interrupta)
Pinnularia bihastata (A. Mann) R. M. Patrick 1966
Doubtful according to GBIF classification (Possible variant of Pinnularia bihastata (Mann, 1924) Mills, 1934)
Pinnularia borealis Mayer 1925
Doubtful according to GBIF classification (Possible variant of Pinnularia borealis Ehrenberg)
Pinnularia brebissonii Kütz.
Doubtful according to GBIF classification (Possible variant of Pinnularia brebissonii (Kütz.) Rabenh.)
Pinnularia brebissonii var. baltica Schulz 1926
Homotypic synonym according to GBIF classification (Originally found in sources as accepted taxon within Pinnularia acutobrebissonii Kulikovskiy, Lange-Bertalot & Metzeltin, 2010)
Pinnularia capitata W. Greg.
Doubtful according to GBIF classification (Possible variant of Pinnularia capitata Ehrenberg, 1848)