Achnantheiopsis Lange-Bert., 1997 accepted as Planothidium F.E. Round & L. Bukhtiyarova, 1996 (basis of record)
Achnantheiopsis Lange-Bert., 1997 accepted as Planothidium F.E. Round & L. Bukhtiyarova, 1996 (status source)
Achnantheiopsis peragalloi (Brun & Hérib.) Lange-Bert., 1997 accepted as Planothidium peragalloi (J.Brun & Héribaud-Joseph) Round & L.Bukhtiyarova, 1996 (basis of record)
Achnanthes Bory, 1822 (additional source)
Achnanthes affinis Grunow, 1880 accepted as Achnanthidium affine (Grunow) Czarnecki, 1994 accepted as Achnanthes affinis var. affinis Grunow in Cleve & Grunow, 1880 (additional source)
Achnanthes affinis var. affinis Grunow in Cleve & Grunow, 1880 accepted as Achnanthes affinis Grunow, 1880 accepted as Achnanthidium affine (Grunow) Czarnecki, 1994 (basis of record)
Achnanthes angustata Grev., 1859 (basis of record)
Achnanthes austriaca Hust., 1922 accepted as Eucocconeis austriaca (Hustedt) H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot (ed.), 1999 accepted as Achnanthes austriaca var. austriaca Hust., 1922 (additional source)
Achnanthes austriaca var. austriaca Hust., 1922 accepted as Achnanthes austriaca Hust., 1922 accepted as Eucocconeis austriaca (Hustedt) H. Lange-Bertalot apud H. Lange-Bertalot & S.I. Genkal in H. Lange-Bertalot (ed.), 1999 (additional source)
Achnanthes biasolettiana Grunow, 1880 accepted as Achnanthidium pyrenaicum (Hustedt) H.Kobayasi, 1997 accepted as Achnanthes pyrenaica var. pyrenaica Hustedt, 1939 (additional source)
Achnanthes biasolettiana var. biasolettiana Grunow accepted as Achnanthes biasolettiana Grunow, 1880 accepted as Achnanthidium pyrenaicum (Hustedt) H.Kobayasi, 1997 accepted as Achnanthes pyrenaica var. pyrenaica Hustedt, 1939 (basis of record)
Achnanthes bottnica (Cleve) Cleve, 1895 accepted as Achnanthes clevei var. bottnica Cleve, 1891 (additional source)
Achnanthes brevipes C.Agardh, 1824 (additional source)
Achnanthes brevipes var. brevipes Agardh, 1824 (additional source)
Achnanthes brevipes var. intermedia (Kützing) Cleve, 1895 accepted as Achnanthes intermedia Kützing, 1833 (additional source)
Achnanthes brevipes var. parvula (Kützing) Cleve, 1895 accepted as Achnanthes parvula Kützing, 1844 (additional source)
Achnanthes clevei Grunow, 1880 accepted as Karayevia clevei (Grunow) Round & Bukhtiyarova, 1999 (additional source)
Achnanthes clevei var. bottnica Cleve, 1891 (additional source)
Achnanthes clevei var. clevei Grunow, 1880 (basis of record)
Achnanthes clevei var. rostrata Hustedt, 1930 (additional source)
Achnanthes coarctata (Brébisson ex W.Smith) Grunow, 1880 (additional source)
Achnanthes coarctata var. sinaensis Hustedt, 1949 (additional source)
Achnanthes conspicua var. conspicua A.Mayer, 1919 (additional source)
Achnanthes delicatula (Kützing) Grunow in Cleve & Grunow, 1880 accepted as Planothidium delicatulum (Kützing) Round & Bukhtiyarova, 1996 accepted as Achnanthidium delicatulum f. delicatulum Kützing, 1844 (additional source)
Achnanthes dispar Cleve, 1891 accepted as Planothidium dispar (Cleve) Witkowski, Lange-Bertalot & Metzeltin, 2000 accepted as Achnanthes dispar var. dispar Cleve, 1891 (additional source)
Achnanthes dispar Mann, 1907 (basis of record)
Achnanthes dispar var. dispar Cleve, 1891 (basis of record)
Achnanthes exigua Grunow, 1880 (additional source)
Achnanthes exigua f. heterovalvata Krasske, 1923 (basis of record)
Achnanthes exigua var. exigua Grunow in Cleve & Grunow, 1880 (basis of record)
Achnanthes fimbriata (Grunow) R.Ross, 1963 accepted as Schizostauron fimbriatum Grunow, 1867 (additional source)
Achnanthes grimmei Krasske, 1925 accepted as Crenotia grimmei (Krasske) Wojtal (additional source)
Achnanthes groenlandica (Cleve) Grunow, 1880 (additional source)
Achnanthes grubei Simonsen, 1987 (additional source)
Achnanthes hauckiana Grunow, 1880 (additional source)
Achnanthes hauckiana var. hauckiana Grunow in Cleve & Grunow, 1880 (basis of record)
Achnanthes hauckiana var. rostrata Schulz, 1926 (additional source)
Achnanthes hungarica (Grunow) Grunow, 1880 accepted as Lemnicola hungarica (Grunow) F.E.Round & P.W.Basson, 1997 accepted as Achnanthidium hungaricum Grunow, 1863 (additional source)
Achnanthes hyperborea (Grunow) Grunow, 1884 (additional source)
Achnanthes intermedia Kützing, 1833 (additional source)
Achnanthes laevis Østrup, 1910 (additional source)
Achnanthes lanceolata (Brébisson ex Kützing) Grunow, 1880 accepted as Planothidium lanceolatum (Brébisson ex Kützing) Bukhtiyarova, 1999 (additional source)
Achnanthes lanceolata var. dubia Grunow, 1880 (additional source)
Achnanthes lanceolata var. elliptica Cleve, 1891 (additional source)
Achnanthes lanceolata var. minutissima Krasske, 1938 accepted as Planothidium minutissimum (Krasske) Lange-Bertalot, 1999 (basis of record)
Achnanthes lanceolata var. rostrata Hustedt, 1911 accepted as Planothidium rostratoholarcticum Lange-Bertalot & Bąk in Bąk & Lange-Bertalot, 2014 (additional source)
Achnanthes lapponica (Hustedt) Hustedt, 1933 accepted as Eucocconeis quadratarea (Østrup) Lange-Bertalot, 1999 (additional source)
Achnanthes latissima Cleve-Euler, 1915 (additional source)
Achnanthes lemmermannii Hustedt, 1933 (additional source)
Achnanthes lemmermannii var. lemmermannii Hustedt, 1933 (additional source)
Achnanthes lemmermannii var. obtusa Hustedt, 1939 (additional source)
Achnanthes levanderi var. levanderi Hustedt, 1933 (basis of record)
Achnanthes lilljeborgii Grunow, 1881 (basis of record)
Achnanthes linearis (W.Smith) Grunow, 1880 accepted as Achnanthidium lineare W.Smith, 1855 (additional source)
Achnanthes linearis var. pusilla (Grunow) Cleve, 1895 accepted as Achnanthes pusilla Grunow in Cleve & Grunow, 1880 (basis of record)
Achnanthes linkei Hustedt, 1939 accepted as Planothidium linkei (Hustedt) Lange-Bertalot, 1999 accepted as Achnanthes linkei var. linkei Hustedt, 1939 (additional source)
Achnanthes linkei var. linkei Hustedt, 1939 (basis of record)
Achnanthes longipes C.Agardh, 1824 (additional source)
Achnanthes microcephala (Kützing) Grunow, 1880 accepted as Achnanthidium microcephalum Kützing, 1844 (additional source)
Achnanthes minuscula Hustedt, 1945 (additional source)
Achnanthes minutissima Kützing, 1833 (additional source)
Achnanthes minutissima var. cryptocephala Grunow, 1880 (additional source)
Achnanthes minutissima var. minutissima Kützing, 1833 (basis of record)
Achnanthes oblongella Østrup, 1902 (additional source)
Achnanthes oestrupii (Cleve-Euler) Hustedt, 1930 (additional source)
Achnanthes parvula Kützing, 1844 (additional source)
Achnanthes peragalloi Brun & Héribaud-Joseph, 1893 (additional source)
Achnanthes petersenii var. petersenii Hustedt, 1936 (basis of record)
Achnanthes pseudobrevipes Aleem, 1950 (additional source)
Achnanthes pusilla Grunow in Cleve & Grunow, 1880 (additional source)
Achnanthes pusilla var. petersenii (Hustedt) Lange-Bertalot, 1980 accepted as Achnanthes petersenii var. petersenii Hustedt, 1936 (additional source)
Achnanthes pyrenaica var. pyrenaica Hustedt, 1939 (basis of record)
Achnanthes rosenstockii Lange-Bertalot, 1989 (additional source)
Achnanthes rostrata Oestrup, 1902 (additional source)
Achnanthes saxonica Krasske ex Hustedt, 1933 (additional source)
Achnanthes similis McCall, 1933 (additional source)
Achnanthes subsalsa J.B.Petersen, 1928 (additional source)
Achnanthes subsalsoides Hustedt, 1933 (additional source)
Achnanthes suchlandtii var. suchlandtii Hustedt, 1933 (basis of record)
Achnanthes taeniata Grunow, 1880 accepted as Pauliella taeniata (Grunow) F.E.Round & P.W.Basson, 1997 (additional source)
Achnanthes taeniata var. hyperborea Grunow, 1878 accepted as Achnanthes hyperborea (Grunow) Grunow, 1884 (additional source)
Achnanthes thermalis (Rabenhorst) Schoenfeld, 1907 accepted as Achnanthidium thermale Rabenhorst, 1864 accepted as Crenotia thermalis (Rabenhorst) Wojtal (additional source)
Achnanthes ventralis (Krasske) Lange-Bertalot, 1989 accepted as Navicula ventralis Krasske, 1923 (basis of record)
Achnanthidium F.T. Kützing, 1844 (additional source)
Achnanthidium affine (Grunow) Czarnecki, 1994 accepted as Achnanthes affinis var. affinis Grunow in Cleve & Grunow, 1880 accepted as Achnanthes affinis Grunow, 1880 (basis of record)
Achnanthidium biasolettianum (Grunow) Bukhtiyarova, 1995 accepted as Achnanthes biasolettiana var. biasolettiana Grunow accepted as Achnanthes biasolettiana Grunow, 1880 accepted as Achnanthidium pyrenaicum (Hustedt) H.Kobayasi, 1997 accepted as Achnanthes pyrenaica var. pyrenaica Hustedt, 1939 (additional source)
Achnanthidium clevei (Grunow) D.B.Czarnecki, 1995 accepted as Achnanthes clevei var. clevei Grunow, 1880 (additional source)
Achnanthidium coarctatum Brébisson ex W.Smith, 1855 accepted as Achnanthes coarctata (Brébisson ex W.Smith) Grunow, 1880 (additional source)
Achnanthidium delicatulum sensu Schumann, 1867 (basis of record)
Achnanthidium delicatulum f. delicatulum Kützing, 1844 (basis of record)
Achnanthidium exiguum (Grunow) D.B.Czarnecki, 1994 accepted as Achnanthes exigua var. exigua Grunow in Cleve & Grunow, 1880 (basis of record)
Achnanthidium exiguum var. heterovalvum (G.Krasske) D.B.Czarnecki, 1994 accepted as Achnanthes exigua f. heterovalvata Krasske, 1923 (basis of record)
Achnanthidium hungaricum Grunow, 1863 (additional source)
Achnanthidium lanceolatum Brébisson ex Kützing, 1846 accepted as Planothidium lanceolatum (Brébisson ex Kützing) Bukhtiyarova, 1999 (additional source)
Achnanthidium lanceolatum f. lanceolatum Brébisson ex Kützing, 1846 (basis of record)
Achnanthidium lineare W.Smith, 1855 (additional source)
Achnanthidium microcephalum Kützing, 1844 (additional source)
Achnanthidium minutissimum (Kützing) Czarnecki, 1994 accepted as Achnanthes minutissima var. minutissima Kützing, 1833 (additional source)
Achnanthidium pyrenaicum (Hustedt) H.Kobayasi, 1997 accepted as Achnanthes pyrenaica var. pyrenaica Hustedt, 1939 (basis of record)
Achnanthidium rosenstockii (Lange-Bertalot) Lange-Bertalot, 2004 accepted as Achnanthes rosenstockii Lange-Bertalot, 1989 (basis of record)