Achnanthes hungarica var. miramaris Frenguelli, 1925 (original description)
Achnanthes rivularia Frenguelli, 1925 accepted as
Achnanthes hungarica var. rivularia (Frenguelli) Frenguelli, 1933 (original description)
Amphora miramaris Frenguelli, 1925 (original description)
Amphora veneta var. minor Frenguelli, 1925 (original description)
Cymbella cymbiformis f. minor Frenguelli, 1925 (original description)
Epithemia musculus var. perlonga J.Frenguelli accepted as
Epithemia gibberula var. perlonga Pantocsek, 1889 (new combination reference)
Gomphonema constrictum f. parva Grunow ex Fricke in Schmidt et al., 1904 (new combination reference)
Gomphonema constrictum var. schmidtii Frenguelli, 1923 accepted as
Gomphonema constrictum Ehrenberg, 1832 accepted as
Gomphonema truncatum Ehrenberg, 1832 (additional source)
Gomphonema subclavatum var. bonaerense Frenguelli, 1925 (original description)
Gomphonema subclavatum var. bonaerensis Frenguelli, 1925 (original description)
Navicula borealis f. minor (M. Peragallo & Héribaud) Frenguelli, 1926 accepted as
Navicula borealis var. minor M. Peragallo & Héribaud in Héribaud, 1893 (original description)
Navicula brevis var. distoma (Grunow) Frenguelli, 1925 accepted as
Navicula distoma f. distoma Grunow in Cleve & Grunow, 1880 (new combination reference)
Navicula capitulata Frenguelli, 1925 (original description)
Navicula fasciata var. miramaris Frenguelli, 1925 (original description)
Navicula formosa var. intermedia (Frenguelli) Frenguelli, 1925 accepted as
Navicula liburnica var. intermedia Frenguelli, 1923 accepted as
Caloneis formosa var. intermedia (Frenguelli) Frenguelli, 1933 (new combination reference)
Navicula hungarica f. ovalis Frenguelli, 1925 (original description)
Navicula microstauron f. stauroneiformis (Peragallo) Frenguelli, 1925 accepted as
Navicula microstauron var. stauroneiformis Peragallo in Frenguelli, 1924 (new combination reference)
Navicula miramaris Frenguelli, 1925 (original description)
Navicula subovalis var. argentina Frenguelli, 1925 accepted as
Diploneis argentina (Frenguelli) Frenguelli, 1945 (new combination reference)
Nitzschia oxyrhynchus Frenguelli, 1925 (original description)
Nitzschia virgata var. capitellata (Hustedt) Frenguelli, 1925 accepted as
Hantzschia virgata var. capitellata Hustedt in Schmidt et al., 1922 (new combination reference)
Rhopalodia musculus var. perlonga (Pantocsek) Frenguelli, 1925 accepted as
Epithemia gibberula var. perlonga Pantocsek, 1889 (new combination reference)
Synedra goulardi var. acus (Kützing) Frenguelli, 1925 accepted as
Synedra acus f. acus Kützing, 1844 (new combination reference)
Buenos Aires for
Achnanthes hungarica var. miramaris Frenguelli, 1925
Buenos Aires for
Achnanthes rivularia Frenguelli, 1925
Buenos Aires for
Amphora miramaris Frenguelli, 1925
Buenos Aires for
Amphora veneta var. minor Frenguelli, 1925
Buenos Aires for
Amphora veneta var. minor Frenguelli, 1925
Buenos Aires for
Cymbella cymbiformis f. minor Frenguelli, 1925
Buenos Aires for
Cymbella cymbiformis f. minor Frenguelli, 1925
Buenos Aires for
Epithemia musculus var. perlonga J.Frenguelli
Buenos Aires for
Gomphonema subclavatum var. bonaerense Frenguelli, 1925
Buenos Aires for
Gomphonema subclavatum var. bonaerense Frenguelli, 1925
Buenos Aires for
Navicula fasciata var. miramaris Frenguelli, 1925
Buenos Aires for
Navicula hungarica f. ovalis Frenguelli, 1925
Buenos Aires for
Navicula hungarica f. ovalis Frenguelli, 1925
Buenos Aires for
Navicula miramaris Frenguelli, 1925
Buenos Aires for
Navicula subovalis var. argentina Frenguelli, 1925
Buenos Aires for
Nitzschia oxyrhynchus Frenguelli, 1925
Buenos Aires for
Nitzschia paradoxa var. paucistriata Frenguelli, 1923