Achnanthes delicatula var. pacis Frenguelli, 1923 (original description)
Amphora libyca f. major Frenguelli, 1923 (original description)
Amphora libyca var. cymbiformis Frenguelli, 1923 (original description)
Amphora lybica f. major J.Frenguelli, 1923 (original description)
Amphora lybica var. cymbiformis J.Frenguelli, 1923 (original description)
Amphora perpusilla var. exilis (Grunow in Van Heurck) Frenguelli, 1923 accepted as
Amphora pediculus var. exilis Grunow in Van Heurck, 1880 (new combination reference)
Anomoeoneis sculpta var. doliolus Frenguelli, 1923 (original description)
Anomoeoneis sculpta var. temperei (Frenguelli) Frenguelli, 1951 (original description)
Caloneis ventricosa var. elliptica Frenguelli, 1923 (original description)
Epithemia gibberula var. argentina (Brun in Brun & Tempère) Frenguelli, 1923 accepted as
Epithemia argentina Brun in Brun & Tempère, 1889 (new combination reference)
Gomphonema augur var. capitulata Frenguelli, 1923 (original description)
Gomphonema clerici Frenguelli, 1923 (original description)
Gomphonema commutatum f. curta Frenguelli, 1923 (original description)
Gomphonema constrictum f. schmidtii Frenguelli, 1923 (original description)
Gomphonema constrictum var. schmidtii Frenguelli, 1923 accepted as
Gomphonema constrictum Ehrenberg, 1832 accepted as
Gomphonema truncatum Ehrenberg, 1832 (original description)
Gomphonema frickei Frenguelli, 1923 accepted as
Gomphonema frickei O.Müller, 1905 (original description)
Gomphonema parvulum var. lagenula (Kützing) Frenguelli, 1923 accepted as
Gomphonema lagenula var. lagenula Kützing, 1844 (new combination reference)
Gyrosigma spenceri var. smithii (Grunow in Cleve & Grunow) Frenguelli, 1923 accepted as
Pleurosigma spencerii var. smithii Grunow in Cleve & Grunow, 1880 (new combination reference)
Melosira granulata var. australiensis (Grunow) Frenguelli, 1923 (new combination reference)
Melosira granulata var. tenuis Frenguelli, 1923 (original description)
Melosira perpusilla Frenguelli, 1923 (original description)
Microneis delicatula var. pacis Frenguelli, 1923 (original description)
Microneis lanceolata f. lanceolata (Brebisson in Kutzing) Frenguelli, 1923 accepted as
Achnanthidium lanceolatum f. lanceolatum Brébisson ex Kützing, 1846 (new combination reference)
Microneis lanceolata var. dubia (Grunow) Frenguelli, 1923 accepted as
Achnanthes lanceolata var. dubia Grunow, 1880 (new combination reference)
Microneis lanceolata var. haynaldii (Schaarschmidt) Frenguelli, 1923 (new combination reference)
Navicula ambigua var. aubertii (Héribaud in Héribaud et al.) Frenguelli, 1923 accepted as
Navicula aubertii Héribaud in Héribaud et al., 1920 (new combination reference)
Navicula aperta Frenguelli, 1923 accepted as
Pinnularia aperta var. aperta (Frenguelli) F.W. Mills, 1934 (original description)
Navicula bacterium Frenguelli, 1923 (original description)
Navicula clericii Frenguelli, 1923 accepted as
Pinnularia Clericii (Frenguelli) Mills, 1934 (original description)
Navicula dactylus var. argentina Frenguelli, 1923 accepted as
Pinnularia dactylus var. argentina (Frenguelli) Mills, 1934 (original description)
Navicula dactylus var. lata Frenguelli, 1923 accepted as
Pinnularia dactylus var. lata (Frenguelli) F.W. Mills, 1934 (original description)
Navicula doeringii Frenguelli accepted as
Pinnularia doeringii (Frenguelli) Mills, 1934 (original description)
Navicula doeringii var. cryptocephala Frenguelli, 1923 accepted as
Pinnularia doeringii var. cryptocephala (Frenguelli) F.W. Mills, 1934 (original description)
Navicula doeringii var. doeringii Frenguelli, 1923 (original description)
Navicula gracilis f. constricta Frenguelli, 1923 (original description)
Navicula liburnica var. intermedia Frenguelli, 1923 accepted as
Caloneis formosa var. intermedia (Frenguelli) Frenguelli, 1933 (original description)
Navicula microstauron var. subproducta (Grunow in Van Heurck) Frenguelli, 1923 accepted as
Navicula brebissonii var. subproducta Grunow in Van Heurck, 1880 (new combination reference)
Navicula nobilis var. cuneata Frenguelli, 1923 accepted as
Pinnularia nobilis var. cuneata (Frenguelli) F.W. Mills, 1934 (original description)
Navicula ovalis var. oblongella (Nägeli) Dippel, 1905 accepted as
Navicula oblongella var. oblongella Naegeli in Kutzing, 1849 (new combination reference)
Navicula peregrina var. curta Frenguelli, 1923 † (original description)
Navicula perrotetii var. rostrata Frenguelli, 1923 (original description)
Navicula perrotettii var. rostrata Frenguelli † (original description)
Navicula pygmaea Frenguelli, 1923 (original description)
Navicula sculpta var. doliolus Frenguelli, 1923 (original description)
Navicula ventricosa var. elliptica Frenguelli, 1923 accepted as
(original description)
Navicula viridis var. distinguenda (Cleve) Frenguelli, 1923 † accepted as
Pinnularia viridis var. distinguenda Cleve, 1891 † (new combination reference)
Nitzschia amphioxys var. compacta (Hustedt in Schmidt et al.) Frenguelli, 1923 accepted as
Hantzschia amphioxys f. compacta Hustedt in Schmidt et al., 1922 (new combination reference)
Nitzschia amphioxys var. xerophila (Grunow in Cleve & Grunow) Frenguelli, 1923 accepted as
Hantzschia amphioxys var. xerophila Grunow in Cleve & Grunow, 1880 (new combination reference)
Nitzschia calica var. salinarum (Grunow in Cleve & Grunow) Frenguelli, 1923 accepted as
Nitzschia tryblionella var. salinarum Grunow in Cleve & Grunow, 1880 (new combination reference)
Nitzschia laevis Frenguelli, 1923 (original description)
Nitzschia levis Frenguelli, 1923 (original description)
Nitzschia paradoxa var. paucistriata Frenguelli, 1923 accepted as
Bacillaria paradoxa var. paucistriata (Frenguelli) Luchini & Verona, 1972 (original description)
Nitzschia vitrioides Frenguelli, 1923 (original description)
Pinnularia Clericii (Frenguelli) Mills, 1934 (original description)
Rhopalodia gibberula var. argentina (Brun in Brun & Tempère) Frenguelli, 1923 accepted as
Epithemia argentina Brun in Brun & Tempère, 1889 (new combination reference)
Sigmatella sigma var. sigma (Kützing) Frenguelli, 1923 accepted as
Synedra sigma Kützing, 1844 (new combination reference)
Córdoba for
Achnanthes delicatula var. pacis Frenguelli, 1923
Córdoba for
Achnanthes delicatula var. pacis Frenguelli, 1923
Córdoba for
Achnanthes delicatula var. pacis Frenguelli, 1923
Córdoba for
Achnanthes delicatula var. pacis Frenguelli, 1923
Córdoba for
Amphora libyca f. major Frenguelli, 1923
Córdoba for
Amphora libyca f. major Frenguelli, 1923
Córdoba for
Amphora lybica f. major J.Frenguelli, 1923
Córdoba for
Amphora lybica f. major J.Frenguelli, 1923
Córdoba for
Amphora lybica f. major J.Frenguelli, 1923
Córdoba for
Amphora lybica var. cymbiformis J.Frenguelli, 1923
Córdoba for
Amphora lybica var. cymbiformis J.Frenguelli, 1923
Córdoba for
Gomphonema augur var. capitulata Frenguelli, 1923
Córdoba for
Gomphonema augur var. capitulata Frenguelli, 1923
Córdoba for
Gomphonema clerici Frenguelli, 1923
Córdoba for
Gomphonema commutatum f. curta Frenguelli, 1923
Córdoba for
Gomphonema constrictum var. schmidtii Frenguelli, 1923
Córdoba for
Gomphonema constrictum var. schmidtii Frenguelli, 1923
Córdoba for
Gomphonema constrictum var. schmidtii Frenguelli, 1923
Córdoba for
Gomphonema frickei Frenguelli, 1923
Córdoba for
Melosira granulata var. tenuis Frenguelli, 1923
Córdoba for
Melosira granulata var. tenuis Frenguelli, 1923
Córdoba for
Melosira granulata var. tenuis Frenguelli, 1923
Córdoba for
Melosira granulata var. tenuis Frenguelli, 1923
Córdoba for
Melosira granulata var. tenuis Frenguelli, 1923
Córdoba for
Melosira granulata var. tenuis Frenguelli, 1923
Córdoba for
Melosira perpusilla Frenguelli, 1923
Córdoba for
Melosira perpusilla Frenguelli, 1923
Córdoba for
Melosira perpusilla Frenguelli, 1923
Córdoba for
Navicula aperta Frenguelli, 1923
Córdoba for
Navicula aperta Frenguelli, 1923
Córdoba for
Navicula aperta Frenguelli, 1923
Córdoba for
Navicula bacterium Frenguelli, 1923
Córdoba for
Navicula clericii Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923
Córdoba for
Navicula dactylus var. argentina Frenguelli, 1923 (
origin: native)
Córdoba for
Navicula dactylus var. lata Frenguelli, 1923
Córdoba for
Navicula dactylus var. lata Frenguelli, 1923
Córdoba for
Navicula dactylus var. lata Frenguelli, 1923
Córdoba for
Navicula dactylus var. lata Frenguelli, 1923
Córdoba for
Navicula dactylus var. lata Frenguelli, 1923
Córdoba for
Navicula dactylus var. lata Frenguelli, 1923
Córdoba for
Navicula doeringii Frenguelli
Córdoba for
Navicula doeringii Frenguelli
Córdoba for
Navicula doeringii Frenguelli
Córdoba for
Navicula doeringii Frenguelli
Córdoba for
Navicula doeringii var. cryptocephala Frenguelli, 1923
Córdoba for
Navicula doeringii var. cryptocephala Frenguelli, 1923
Córdoba for
Navicula doeringii var. cryptocephala Frenguelli, 1923
Córdoba for
Navicula doeringii var. cryptocephala Frenguelli, 1923
Córdoba for
Navicula gracilis f. constricta Frenguelli, 1923
Córdoba for
Navicula gracilis f. constricta Frenguelli, 1923
Córdoba for
Navicula gracilis f. constricta Frenguelli, 1923
Córdoba for
Navicula gracilis f. constricta Frenguelli, 1923
Córdoba for
Navicula gracilis f. constricta Frenguelli, 1923
Córdoba for
Navicula liburnica var. intermedia Frenguelli, 1923
Córdoba for
Navicula liburnica var. intermedia Frenguelli, 1923
Córdoba for
Navicula liburnica var. intermedia Frenguelli, 1923
Córdoba for
Navicula liburnica var. intermedia Frenguelli, 1923
Córdoba for
Navicula nobilis var. cuneata Frenguelli, 1923
Córdoba for
Navicula nobilis var. cuneata Frenguelli, 1923
Córdoba for
Navicula peregrina var. curta Frenguelli, 1923 †
Córdoba for
Navicula peregrina var. curta Frenguelli, 1923 †
Córdoba for
Navicula perrotetii var. rostrata Frenguelli, 1923
Córdoba for
Navicula perrotettii var. rostrata Frenguelli †
Córdoba for
Navicula perrotettii var. rostrata Frenguelli †
Córdoba for
Navicula sculpta var. doliolus Frenguelli, 1923
Córdoba for
Navicula sculpta var. doliolus Frenguelli, 1923
Córdoba for
Navicula sculpta var. doliolus Frenguelli, 1923
Córdoba for
Navicula sculpta var. doliolus Frenguelli, 1923
Córdoba for
Navicula sculpta var. doliolus Frenguelli, 1923
Córdoba for
Navicula sculpta var. doliolus Frenguelli, 1923
Córdoba for
Navicula sculpta var. temperei Frenguelli, 1923
Córdoba for
Navicula sculpta var. temperei Frenguelli, 1923
Córdoba for
Navicula sculpta var. temperei Frenguelli, 1923
Córdoba for
Navicula sculpta var. temperei Frenguelli, 1923
Córdoba for
Navicula sculpta var. temperei Frenguelli, 1923
Córdoba for
Navicula sculpta var. temperei Frenguelli, 1923
Córdoba for
Navicula ventricosa var. elliptica Frenguelli, 1923
Córdoba for
Nitzschia levis Frenguelli, 1923
Córdoba for
Nitzschia levis Frenguelli, 1923
Córdoba for
Nitzschia levis Frenguelli, 1923
Córdoba for
Nitzschia paradoxa var. paucistriata Frenguelli, 1923
Córdoba for
Nitzschia paradoxa var. paucistriata Frenguelli, 1923
Córdoba for
Nitzschia paradoxa var. paucistriata Frenguelli, 1923
Córdoba for
Nitzschia vitrioides Frenguelli, 1923
Córdoba for
Nitzschia vitrioides Frenguelli, 1923
Córdoba for
Nitzschia vitrioides Frenguelli, 1923
Córdoba for
Nitzschia vitrioides Frenguelli, 1923