Navicula divergens var. truncata (Cleve-Euler) F.W.Mills, 1934 accepted as Pinnularia divergens var. truncata Cleve-Euler, 1915 (new combination reference)
Navicula formica Ehrenberg, 1843 accepted as Pinnularia formica (Ehrenberg) R.M.Patrick, 1966 † (new combination reference)
Navicula tibetana (Hustedt) F.W. Mills, 1934 accepted as Pinnularia tibetana var. tibetana Hustedt, 1922 (new combination reference)
Navicula viridis var. diminuta (Mayer ex Hustedt) F.W. Mills, 1934 accepted as Pinnularia viridis var. diminuta Mayer, 1913 (new combination reference)
Nitzschia tenuirostris var. tenuirostris (Mereschkowsky) F.W. Mills, 1934 accepted as Nitzschiella tenuirostris f. tenuirostris Mereschkowsky, 1901 (new combination reference)
Odontidium mesodon var. cuneata (Ehrenberg) F.W. Mills, 1934 accepted as Bacillaria cuneata (Kützing) Ehrenberg, 1838 accepted as Diatoma tenue var. cuneatum Kützing, 1833 (1834) (new combination reference)
Odontidium mesodon var. quadrata (Kützing) F.W. Mills, 1934 (new combination reference)
Oestrupia powellii var. bartholomei (Cleve) F.W. Mills, 1934 accepted as Navicula bartholomei Cleve, 1878 (new combination reference)
Oestrupia powellii var. galapagensis (Cleve) F.W. Mills, 1934 accepted as Navicula powelli var. galapagensis Cleve, 1881 (new combination reference)
Oestrupia problematica (Azpeitia y Moros) F.W. Mills, 1934 (new combination reference)
Orthoneis hillabyana (Brun) F.W. Mills, 1934 accepted as Mastogloia hillabyana var. hillabyana Brun, 1896 (new combination reference)
Orthoneis horvathiana var. adamantina (Brun) F.W. Mills, 1934 accepted as Mastogloia hillabyana var. adamantina Brun, 1896 (new combination reference)
Paralia sulcata var. scopos (Mann) F.W. Mills, 1934 accepted as Melosira scopos Mann, 1907 (new combination reference)
Pinnularia acrosphaeria var. bacillaris (Heribaud) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. bacillaris Héribaud, 1903 (new combination reference)
Pinnularia acrosphaeria var. badeana (Heribaud & M. Peragallo in Heribaud) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. badeana Héribaud & M. Peragallo in Héribaud, 1902 (new combination reference)
Pinnularia acrosphaeria var. dilata (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 (new combination reference)
Pinnularia acrosphaeria var. dilatata (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. dilatata M. Peragallo in Tempère & Peragallo, 1908 (new combination reference)
Pinnularia acrosphaeria var. elongata (Heribaud) F.W. Mills, 1934 accepted as Navicula acrosphaeria var. elongata Héribaud, 1903 (new combination reference)
Pinnularia alpina var. elongata (M.Peragallo) F.W.Mills, 1934 accepted as Navicula alpina var. elongata M.Peragallo, 1908 (new combination reference)
Pinnularia aperta var. aperta (Frenguelli) F.W. Mills, 1934 (new combination reference)
Pinnularia appendiculata var. exilis (Grunow) F.W. Mills, 1934 accepted as Navicula appendiculata var. exilis Grunow, 1860 (new combination reference)
Pinnularia appendiculata var. irrorata (Grunow) F.W.Mills, 1934 accepted as Navicula appendiculata var. irrorata Grunow, 1880 (new combination reference)
Pinnularia attwoodii (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 accepted as Navicula attwoodii M. Peragallo in Tempère & Peragallo, 1908 (new combination reference)
Pinnularia bihastata (A.Mann) R.M.Patrick, 1966 (new combination reference)
Pinnularia blotii (Heribaud in Heribaud et al.) F.W. Mills, 1934 accepted as Navicula blotii Héribaud in Héribaud et al., 1920 (new combination reference)
Pinnularia bogotensis var. interrupta (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 accepted as Navicula bogotensis var. interrupta M. Peragallo in Tempère (new combination reference)
Pinnularia borealis f. evidentius punctata (Grunow in Van Heurck) F.W. Mills, 1934 (new combination reference)
Pinnularia borealis var. major (M. Peragallo & Heribaud in Heribaud) F.W. Mills, 1934 accepted as Navicula borealis var. major M. Peragallo & Héribaud in Héribaud, 1893 (new combination reference)
Pinnularia cardinalis var. ceylonica (Skvortzow) F.W. Mills, 1934 accepted as Pinnularia cardinaliculus var. ceylonica Skvortzow, 1930 (new combination reference)
Pinnularia cardinalis var. subconstricta (Rattray) F.W. Mills, 1934 accepted as Navicula cardinalis var. subconstricta Rattray, 1888 (new combination reference)
Pinnularia cellesensis (Heribaud & M. Peragallo in Heribaud) F.W. Mills, 1934 accepted as Navicula cellesensis Héribaud & M. Peragallo in Héribaud, 1902 (new combination reference)
Pinnularia dactylus var. argentina (Frenguelli) Mills, 1934 (basis of record)
Pinnularia dactylus var. lata (Frenguelli) F.W. Mills, 1934 (new combination reference)
Pinnularia danensis (Stiles) F.W. Mills, 1934 accepted as Navicula danensis Stiles, 1918 (new combination reference)
Pinnularia decrescens (Héribaud-Joseph) F.W.Mills, 1934 (new combination reference)
Pinnularia decurrens var. curtecostata (Heribaud) F.W. Mills, 1934 accepted as Navicula decurrens var. curtecostata Héribaud, 1903 (new combination reference)
Pinnularia degenii (Pantocsek) F.W. Mills, 1934 accepted as Navicula degenii Pantocsek, 1902 (new combination reference)
Pinnularia delpiroui (M. Peragallo in Heribaud et al.) F.W. Mills, 1934 accepted as Navicula delpiroui M. Peragallo in Héribaud et al., 1920 (new combination reference)
Pinnularia divergens var. bacillaris (M.Peragallo) Mills, 1934 accepted as Navicula divergens var. bacillaris M.Peragallo, 1908 (new combination reference)
Pinnularia divergens var. constricta (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 accepted as Navicula divergens var. constricta M. Peragallo in Tempère & Peragallo, 1908 (new combination reference)
Pinnularia divergens var. prolongata (Brun & M. Peragallo in Heribaud) F.W. Mills, 1934 accepted as Navicula divergens var. prolongata Brun & M. Peragallo in Héribaud, 1893 (new combination reference)
Pinnularia doeringii var. cryptocephala (Frenguelli) F.W. Mills, 1934 (new combination reference)
Pinnularia doeringii var. doeringii (Frenguelli) F.W. Mills, 1934 accepted as Navicula doeringii var. doeringii Frenguelli, 1923 (new combination reference)
Pinnularia esox var. florentina (Grunow in Cleve & Möller) F.W. Mills, 1934 accepted as Navicula esox var. florentina Grunow in Cleve & Möller, 1877 (new combination reference)
Pinnularia esox var. recta (Heribaud) F.W. Mills, 1934 accepted as Navicula esox var. recta Héribaud, 1903 (new combination reference)
Pinnularia essexii (M. Peragallo in Tempère & Peragallo) F.W. Mills, 1934 accepted as Navicula essexii M. Peragallo in Tempère & Peragallo, 1913 (new combination reference)
Pinnularia eumicrostauron (Mayer) F.W. Mills, 1934 (new combination reference)
Pinnularia farcimen (Østrup) F.W. Mills, 1934 accepted as Navicula farcimen Østrup, 1904 (new combination reference)
Pinnularia flahaulti (Lauby) F.W. Mills, 1934 accepted as Navicula flahaulti Lauby, 1910 (new combination reference)
Pinnularia flexuosa var. cuneata (Tempère & Peragallo) F.W.Mills, 1934 accepted as Navicula flexuosa var. cuneata Tempère & Peragallo, 1909 (new combination reference)
Pinnularia fluminensis var. kerguelensis (Cleve & Grunow) F.W. Mills, 1934 accepted as Navicula fluminensis var. kerguelensis Grunow (new combination reference)
Pinnularia fluminensis var. minor (Cleve & Grunow) F.W. Mills, 1934 accepted as Navicula fluminensis var. minor Grunow, 1880 (new combination reference)
Pinnularia gibba f. genuina (Mayer) F.W. Mills, 1934 accepted as Pinnularia gibba f. genuina Mayer, 1913 (new combination reference)
Pinnularia gibba f. semicruciata (Mayer) F.W. Mills, 1934 accepted as Pinnularia gibba var. semicruciata Mayer, 1916 (1917) (new combination reference)
Pinnularia gibba var. curtecostata (Heribaud) F.W. Mills, 1934 accepted as Navicula decurrens var. curtecostata Héribaud, 1903 (new combination reference)
Pinnularia globiceps var. gracilis (Lauby) F.W. Mills, 1934 (new combination reference)
Pinnularia gomphonemacea (Ostrup in Heribaud et al.) F.W. Mills, 1934 accepted as Navicula gomphonemacea Østrup in Héribaud et al., 1920 (new combination reference)
Pinnularia gracillima var. lucida (Heribaud) F.W. Mills, 1934 accepted as Navicula gracillima var. lucida Héribaud, 1903 (new combination reference)
Pinnularia gracillima var. subcapitata (Gregory) F.W.Mills, 1934 accepted as Pinnularia subcapitata f. subcapitata Gregory, 1856 (new combination reference)
Pinnularia hemiptera f. angusta (Héribaud) F.W. Mills, 1934 accepted as Navicula hemiptera var. angusta Héribaud, 1903 (new combination reference)
Pinnularia hemiptera var. gibba (Heribaud) F.W. Mills, 1934 accepted as Navicula hemiptera var. gibba Héribaud, 1903 (new combination reference)
Pinnularia huei (Heribaud) F.W. Mills, 1934 accepted as Navicula huei var. huei Héribaud, 1903 (new combination reference)
Pinnularia hyrtlii f. hyrtlii (Pantocsek) F.W. Mills, 1934 accepted as Navicula hyrtlii f. hyrtlii Pantocsek, 1892 (new combination reference)
Pinnularia hyrtlii f. minor (Østrup) F.W. Mills, 1934 (new combination reference)
Pinnularia intermedia var. antarctica (M. Peragallo) F.W. Mills, 1934 accepted as Navicula intermedia var. antarctica M. Peragallo, 1921 (new combination reference)
Pinnularia karstenii (Pantocsek) F.W. Mills, 1934 accepted as Navicula karstenii Pantocsek, 1902 (new combination reference)
Pinnularia legumen var. staurophora (Pantocsek) F.W. Mills, 1934 accepted as Navicula legumen var. staurophora Pantocsek, 1903 (new combination reference)
Pinnularia leveillei (Heribaud) F.W. Mills, 1934 accepted as Navicula leveillei Héribaud, 1903 (new combination reference)
Pinnularia loczyi (Pantocsek) F.W. Mills, 1934 accepted as Navicula loczyi Pantocsek, 1889 (new combination reference)
Pinnularia madagascarensis (Fritsch) F.W. Mills, 1934 accepted as Navicula madagascarensis Fritsch, 1914 (new combination reference)
Pinnularia magocsyi (Pantocsek) Cleve-Euler, 1934 accepted as Navicula magocsyi var. magocsyi Pantocsek, 1902 (new combination reference)
Pinnularia major var. angulata (Lauby) F.W. Mills, 1934 accepted as Navicula major var. angulata Lauby, 1910 (new combination reference)
Pinnularia major var. distinguenda (Cleve) F.W.Mills, 1934 † accepted as Pinnularia viridis var. distinguenda Cleve, 1891 † (new combination reference)
Pinnularia major var. horrida (M.Peragallo & Héribaud-Joseph) F.W.Mills, 1934 accepted as Navicula major var. horrida M.Peragallo & Héribaud-Joseph (new combination reference)
Pinnularia major var. latefasciata (Ostrup in Heribaud et al.) F.W. Mills, 1934 accepted as Navicula major var. latefasciata Østrup in Héribaud et al., 1920 (new combination reference)
Pinnularia martyi (Lauby) F.W. Mills, 1934 accepted as Navicula martyi Lauby, 1910 (new combination reference)
Pinnularia megaloptera var. densicostata (Rochoux d'Aubert in Heribaud et al.) F.W. Mills, 1934 accepted as Navicula megaloptera var. densecostata Rochoux d'Aubert in Héribaud et al., 1920 (new combination reference)
Pinnularia mesolepta var. alberti (Heribaud) F.W. Mills, 1934 accepted as Navicula mesolepta var. alberti Héribaud, 1903 (new combination reference)
Pinnularia mesolepta var. protensa (W. West) F.W. Mills, 1934 accepted as Navicula mesolepta var. protensa W. West, 1912 (new combination reference)
Pinnularia mesolepta var. saintignyi (Heribaud) F.W. Mills, 1934 accepted as Navicula mesolepta var. saintignyi Héribaud, 1902 (new combination reference)
Pinnularia mesolepta var. termes (Van Heurck) F.W. Mills, 1934 accepted as Navicula mesolepta var. termes (Ehrenberg) Van Heurck (new combination reference)
Pinnularia microstauron f. ceylonica (Skvortzow) F.W. Mills, 1934 (new combination reference)
Pinnularia microstauron f. minuta (Mayer) F.W. Mills, 1934 (new combination reference)
Pinnularia microstauron f. recta (Skvortzow) F.W. Mills, 1934 accepted as Pinnularia microstauron var. brebissonii Skvortzow, 1930 (new combination reference)
Pinnularia microstauron var. sulcata (Heribaud) F.W. Mills, 1934 accepted as Navicula bicapitata var. sulcata Héribaud, 1903 (new combination reference)
Pinnularia murrayi (W. & G. S. West) F.W. Mills, 1934 accepted as Navicula murrayi var. murrayi W. & G.S. West, 1911 (new combination reference)
Pinnularia nobilis var. cuneata (Frenguelli) F.W. Mills, 1934 (new combination reference)
Pinnularia nobilis var. gracilis (M. Peragallo & Heribaud in Heribaud) F.W. Mills, 1934 accepted as Navicula nobilis var. gracilis M. Peragallo & Héribaud in Héribaud, 1893 (new combination reference)
Pinnularia nobilis var. interrupta (Pantocsek) F.W. Mills, 1934 accepted as Navicula nobilis var. interrupta Pantocsek, 1903 (new combination reference)
Pinnularia nodosa var. arverna (M. Peragallo in Heribaud et al.) F.W. Mills, 1934 accepted as Navicula nodosa var. arverna M. Peragallo in Héribaud et al., 1920 (new combination reference)
Pinnularia nodosa var. stauroneiformis (Lauby) F.W. Mills, 1934 accepted as Navicula nodosa var. stauroneiformis Lauby, 1910 (new combination reference)
Pinnularia notata var. imperfecta (Rochoux d'Aubert in Heribaud et al.) F.W. Mills, 1934 (new combination reference)
Pinnularia notata var. notata (M. Peragallo & Heribaud in Heribaud) F.W. Mills, 1934 accepted as Navicula notata var. notata M. Peragallo & Héribaud in Héribaud, 1893 (new combination reference)
Pinnularia oestrupii (Heribaud in Heribaud et al.) F.W. Mills, 1934 accepted as Navicula oestrupii Héribaud in Héribaud et al., 1920 (new combination reference)
Pinnularia olivieri (Heribaud) F.W. Mills, 1934 accepted as Navicula olivieri Héribaud, 1903 (new combination reference)
Pinnularia perlucens (E.V.Østrup) H.H.Gran accepted as Navicula perlucens Østrup, 1895 (new combination reference)
Pinnularia problematica (Østrup) F.W.Mills, 1934 accepted as Navicula problematica Østrup, 1908 (new combination reference)
Pinnularia rectangulata var. lumen (H. Peragallo) F.W. Mills, 1934 accepted as Navicula regula var. lumen H. Peragallo, 1888 (new combination reference)
Pinnularia rectangulata var. stauntonii (Grunow in Cleve & Möller) F.W. Mills, 1934 accepted as Alloioneis stauntonii Grunow, 1882 (new combination reference)
Pinnularia shackletoni var. pellucida (W. & G. S. West) F.W. Mills, 1934 accepted as Navicula shackletonii var. pellucida W. & G.S. West, 1911 (new combination reference)