Amphora abbreviata Bleich in Rabenhorst, 1863 (uncertain > unassessed )
Amphora abludens Simonsen, 1960 (uncertain > unassessed )
Amphora absoluta Levkov, 2009 (uncertain > unassessed )
Amphora abuensis Foged, 1966 (uncertain > unassessed )
Amphora accomoda Levkov, 2009 (uncertain > unassessed )
Amphora acuta Gregory, 1857
Amphora acuta var. acuta Gregory, 1857 (uncertain > unassessed )
Amphora acuta var. arcuata (A.Schmidt) Cleve, 1895 accepted as Amphora arcuata A.Schmidt, 1875
Amphora acuta var. armata A. Schmidt in Tempère & Peragallo, 1908 (uncertain > unassessed )
Amphora acuta var. genuina Cleve-Euler, 1953 (uncertain > unassessed )
Amphora acuta var. japonica Skvortzow, 1931 (1932) (uncertain > unassessed )
Amphora acuta var. labyrinthica (Grunow in Cleve & Grunow) Cleve, 1895 accepted as Amphora labyrinthica Grunow in Cleve & Grunow, 1880
Amphora acuta var. media Heiden, 1900 (uncertain > unassessed )
Amphora acuta var. minor Foged, 1984 (uncertain > unassessed )
Amphora acuta var. neogena Pantocsek, 1889 (uncertain > unassessed )
Amphora acuta var. parva A.H.Wachnicka & E.E.Gaiser, 2007 (uncertain > unassessed )
Amphora acutissima Giffen, 1980 (uncertain > unassessed )
Amphora acutiuscula Kützing, 1844 accepted as Halamphora acutiuscula (Kützing) Levkov, 2009
Amphora acutiuscula f. branderi Tynni, 1978 (uncertain > unassessed )
Amphora acutiuscula var. acutiuscula Kützing, 1844 (uncertain > unassessed )
Amphora acutiuscula var. constricta (Grunow) Cleve, 1878 accepted as Amphora lineata var. constricta Grunow, 1878
Amphora acutiuscula var. fossilis Pantocsek, 1902 (uncertain > unassessed )
Amphora acutiuscula var. neglecta Rochoux d'Aubert in Héribaud, 1920 (uncertain > unassessed )
Amphora acutiuscula var. parvula Mereschkowsky, 1902-1903 (uncertain > unassessed )
Amphora acutiuscula var. subconstricta (Grunow) Cleve, 1895 accepted as Amphora lineata var. subconstricta Grunow, 1878
Amphora adnata Gaud, 1974 (uncertain > unassessed )
Amphora adumbrata Hohn & Hellerman, 1966 (uncertain > unassessed )
Amphora advena VanLandingham, 1967 (uncertain > unassessed )
Amphora aegaea Ehrenberg, 1859 (uncertain > unassessed )
Amphora aequalis Krammer, 1980 (uncertain > unassessed )
Amphora aequatorialis Heiden, 1928 (uncertain > unassessed )
Amphora aestuarii Cleve, 1894 (uncertain > unassessed )
Amphora affiniformis Levkov, 2009 (uncertain > unassessed )
Amphora affinis Kützing, 1844
Amphora affinis sensu W. Smith, 1853 (uncertain > unassessed )
Amphora affinis W. Smith ex Wolle, 1890 (uncertain > unassessed )
Amphora affinis f. affinis Kützing, 1844 (uncertain > unassessed )
Amphora affinis f. minor Grunow in Van Heurck, 1880 (uncertain > unassessed )
Amphora affinis var. ergadensis (Gregory) Tempère & Peragallo, 1908 accepted as Amphora ergadensis Gregory, 1857
Amphora affinis var. proteus (Gregory) Tempère & Peragallo, 1908 accepted as Amphora proteus f. proteus Gregory, 1857
Amphora affinis var. sabiniana Levkov, 2009 (uncertain > unassessed )
Amphora africana H.Heiden (uncertain > unassessed )
Amphora africana var. africana Heiden in Heiden & Kolbe, 1928 (uncertain > unassessed )
Amphora africana var. undulata Heiden in Heiden & Kolbe, 1928 (uncertain > unassessed )
Amphora agapica Skabitschevskaja, 1976 (uncertain > unassessed )
Amphora ajajensis Skabichevskii, 1936 (uncertain > unassessed )
Amphora alaeziarum Ãlvarez-Blanco & S.Blanco, 2014
Amphora alaskana Patrick & Freese, 1961 (uncertain > unassessed )
Amphora alata H.Peragallo
Amphora alata Pomazkina & Rodionova, 2014
Amphora alata var. alata H. Peragallo, 1888 (uncertain > unassessed )
Amphora alata var. aptera Cleve, 1895 (uncertain > unassessed )
Amphora alata var. major Cleve, 1895 (uncertain > unassessed )
Amphora alata var. portus-herculis M. Peragallo, 1904 (uncertain > unassessed )
Amphora aliformis J.G.Stepanek, S. Mayama & J.P.Kociolek, 2015
Amphora allanta Hohn & Hellerman, 1966 (uncertain > unassessed )
Amphora alpestris Levkov, 2009 (uncertain > unassessed )
Amphora alpha Karsten, 1899 (uncertain > unassessed )
Amphora altaica Poretzky, 1933 (uncertain > unassessed )
Amphora alternata Mann, 1925 (uncertain > unassessed )
Amphora alveolata Leuduger-Fortmorel, 1879 (uncertain > unassessed )
Amphora ambigua Meister, 1934 (uncertain > unassessed )
Amphora americana A.H.Wachnicka & E.E.Gaiser, 2007 (uncertain > unassessed )
Amphora amoena Hustedt, 1955 (uncertain > unassessed )
Amphora amphioxys Bailey, 1851 (uncertain > unassessed )
Amphora amphora (Ehrenberg) Pantocsek, 1902 accepted as Navicula amphora Ehrenberg, 1832
Amphora ampla Ehrenberg, 1860 (uncertain > unassessed )
Amphora anceps Mann, 1925 (uncertain > unassessed )
Amphora andesitica Pantocsek, 1892 (uncertain > unassessed )
Amphora angularis Gregory, 1855 accepted as Halamphora angularis (Gregory) Levkov, 2009
Amphora angularis var. angularis Gregory, 1855 (uncertain > unassessed )
Amphora angularis var. angularis sensu Van Heurck, 1885 (uncertain > unassessed )
Amphora angularis var. caspica Karajeva in Karajeva & Gadzhieva, 1975 (uncertain > unassessed )
Amphora angularis var. delicatula Proschkina-Lavrenko, 1963 (uncertain > unassessed )
Amphora angularis var. hybrida Grunow, 1885 (uncertain > unassessed )
Amphora angularis var. lyrata (Gregory) van Heurck, 1885 accepted as Amphora lyrata Gregory, 1857
Amphora angulata ‘Cleve' according to Tempère & H. Peragallo (uncertain > unassessed )
Amphora angulosa H. Peragallo & M. Peragallo, 1899 accepted as Halamphora hybrida (Grunow) Levkov, 2009
Amphora angulosa var. angulosa H. Peragallo & M. Peragallo, 1899 (uncertain > unassessed )
Amphora angulosa var. ceylanica Skvortzow, 1932 (uncertain > unassessed )
Amphora angulosa var. hybrida Grunow, 1880 (uncertain > unassessed )
Amphora angulosa var. lyrata ‘Van Heurck' according to Cleve, 1895 (uncertain > unassessed )
Amphora angusta A. Schmidt in Schmidt et al., 1875 (uncertain > unassessed )
Amphora angusta Ehrenberg, 1845 (uncertain > unassessed )
Amphora angusta Gregory, 1857
Amphora angusta Jurilj, 1957 (uncertain > unassessed )
Amphora angusta f. angusta Gregory, 1857 (uncertain > unassessed )
Amphora angusta f. depressa [Skvortzow] “Hollerbakh & Krasavina”, 1971 (uncertain > unassessed )
Amphora angusta f. depressa Skvortzow, 1932 (uncertain > unassessed )
Amphora angusta f. japonica Skvortzow, 1932 (uncertain > unassessed )
Amphora angusta f. minor M. Peragallo, 1904 (uncertain > unassessed )
Amphora angusta f. minuta Grunow in Schmidt et al., 1875 (uncertain > unassessed )
Amphora angusta f. typica Cleve, 1895 (uncertain > unassessed )
Amphora angusta f. ventricosa (Gregory) Cleve, 1895 accepted as Amphora ventricosa W.Gregory, 1857
Amphora angusta var. adeliae E. Manguin, 1960 (uncertain > unassessed )
Amphora angusta var. angustissima Van Heurck, 1909 (uncertain > unassessed )
Amphora angusta var. arctica Grunow in Cleve & Grunow, 1880 (uncertain > unassessed )
Amphora angusta var. ceylanica Skvortzow, 1932 (uncertain > unassessed )
Amphora angusta var. chinensis Skvortzow, 1932 (uncertain > unassessed )
Amphora angusta var. diducta (Schmidt in Schmidt et al.) Cleve, 1895 accepted as Amphora diducta Schmidt in Schmidt et al., 1875