Acanthodiscus antarcticus Hajós, 1975 †
Acanthodiscus clypeolus (Brun) Van Heurck, 1896 †
Acanthodiscus convexus Hajós & Stradner in Hajós, 1975 †
Acanthodiscus danicus J.Fenner, 1994 †
Acanthodiscus immaculatus (Hanna) V.A.Nikolaev & J.A.Barron in Nikolaev et al., 2001 †
Acanthodiscus ornatus Hajós & Stradner in Hajós, 1975 †
Acanthodiscus paterus (J.A.Long, Fuge & J.Smith) V.A.Nikolajev & Fourt. †
Acanthodiscus rugosus Pant., 1892 †
Acanthodiscus schmidtii Jousé, 1951 †
Acanthodiscus vulcaniformis Jousé, 1951 †
Achnanthepyla arctica (Cleve) Perag., 1921 accepted as Achnanthes brevipes var. arctica (P. T. Cleve) T. Ko-Bayashi, 1965 accepted as Achnanthidium arcticum Cleve, 1873
Achnanthepyla arctica var. incurvata (Østrup) Perag., 1921
Achnanthepyla baccata Perag., 1921
Achnanthepyla bongrainii Perag., 1921 accepted as Achnanthes bongrainii (M. Peragallo) Mann, 1937 accepted as Achnanthepyla bongrainii var. bongrainii Perag., 1921
Achnanthepyla bongrainii var. bongrainii Perag., 1921 accepted as Achnanthepyla bongrainii Perag., 1921 accepted as Achnanthes bongrainii (M. Peragallo) Mann, 1937
Achnanthepyla bongrainii var. dilatata Perag., 1924
Achnanthepyla bongrainii var. parallela Perag., 1921 accepted as Achnanthes bongrainii var. parallela (Peragallo) Frenguelli & Orlando, 1958
Achnanthepyla gainii accepted as Achnanthepyla gainii var. gainii Perag., 1921 accepted as Achnanthes gainii (M. Peragallo) Mann, 1937
Achnanthepyla gainii var. gainii Perag., 1921 accepted as Achnanthes gainii (M. Peragallo) Mann, 1937
Achnanthepyla gainii var. ostrupii Perag., 1921
Achnanthepyla glabrata (Grunow) Perag., 1921
Achnanthepyla glabrata var. aucklandica (Grunow in Cleve & Grunow) Perag., 1921
Achnanthepyla glabrata var. glabrata (Grunow) Perag., 1921 accepted as Achnanthepyla glabrata (Grunow) Perag., 1921
Achnanthepyla groenlandica (Cleve) Perag., 1921 accepted as Achnanthes groenlandica (Cleve) Grunow, 1880
Achnanthepyla jamalinensis (Grunow in Cleve & Grunow) Perag., 1921 accepted as Achnanthes jamalinensis Grunow in Cleve & Grunow, 1880
Achnanthepyla mesogongyla (Grunow in Cleve & Grunow) Perag., 1921
Achnanthepyla minuta ‘(Grunow) M. Peragallo' VanLandingham, 1967 accepted as Achnanthepyla minutula (Grunow) Perag., 1921
Achnanthepyla minutula (Grunow) Perag., 1921
Achnanthepyla simplex Perag., 1921
Achnanthepyla temperei (Perag.) Perag., 1921 accepted as Achnanthes temperei M.Peragallo, 1908
Acigonium gladarmatum S.Komura, 1990 †
Acigonium gladiorum (A.Mann) S.Komura, 1999 † accepted as Biddulphia gladiorum A.Mann, 1907
Acigonium spinosa (Greville) P.A.Sims & D.M.Williams in Sims et al., 2018 †
Actinoclava frankei Otto Müller, 1912 † (uncertain > nomen dubium )
Actinodictyon antiquorum Pantocsek, 1889 † (uncertain > unassessed )
Actinodictyon atlanticum (Kain & Schultze) Ross & Sims, 1997 † accepted as Actinodiscus atlanticus Kain & Schultze, 1889 †
Actinodictyon elegans (Barker & Meakin) Ross & Sims, 1997 † accepted as Anthemodiscus elegans Barker & Meakin, 1943 †
Actinodictyon elegantulus (Grove & Sturt) Desikachary & Sreelatha in Desikachary & Devi, 1986 † accepted as Actinoptychus elegantulus Grove & Sturt, 1887 †
Actinodictyon fergusonii Ross & Sims, 1997 † (uncertain > unassessed )
Actinodictyon quadrisulcatus Meakin & Brigger, 1949 (uncertain > unassessed )
Actinodictyon unca (Long, Fuge & Smith) Wise, 1951 † accepted as Actinodictyon weissflogii var. unca Long, Fuge & Smith, 1946
Actinodictyon uncum (Long, Fuge & Smith) Ross & Sims, 1997 accepted as Actinodictyon weissflogii var. unca Long, Fuge & Smith, 1946
Actinodictyon weissflogii Pantocsek †
Actinodictyon weissflogii var. unca Long, Fuge & Smith, 1946 (uncertain > unassessed )
Actinodictyon weissflogii var. weissflogii Pantocsek, 1892 (uncertain > unassessed )
Actinodiscus atlanticus Kain & Schultze, 1889 † (uncertain > unassessed )
Actinodiscus barbadensis Greville †
Actinodiscus barbadensis var. asiatica Brun in Schmidt et al., 1892 (uncertain > unassessed )
Actinodiscus barbadensis var. barbadensis Greville, 1863 (uncertain > unassessed )
Actinodiscus barkleyi according to Chase (uncertain > unassessed )
Actinodiscus californicus Hanna, 1927 † (uncertain > unassessed )
Actinodiscus contabulatus (A. Schmidt) R. Ross & P.A. Sims, 2000 † accepted as Gyroptychus contabulatus Schmidt in Schmidt et al., 1890 †
Actinodiscus corolla (J. Brun) R. Ross & P.A. Sims, 2000 † accepted as Craspedoporus corolla Brun in Brun & Tempère, 1889 †
Actinodiscus gloria Brun, 1896 † (uncertain > unassessed )
Actinodiscus grayii Grove in Schmidt et al., 1893 † (uncertain > unassessed )
Actinodiscus horologium Brun, 1896 † (uncertain > unassessed )
Actinodiscus italicus R. Ross & P.A. Sims, 2000 † (uncertain > unassessed )
Actinodiscus javanicus R. Ross & P.A. Sims, 2000 † (uncertain > unassessed )
Actinodiscus kamischeviensis Meakin & Brigger, 1949 † (uncertain > unassessed )
Actinodiscus mascarenensis R. Ross & P.A. Sims, 2000 † (uncertain > unassessed )
Actinodiscus mutabilis (Hanna & Brigger) R. Ross & P.A. Sims, 2000 † accepted as Stephanogonia mutabila Hanna & Brigger, 1964 †
Actinodiscus philippinarum R. Ross & P.A. Sims, 2000 † (uncertain > unassessed )
Actinodiscus schleinitzii ‘Janisch' Mann, 1925 (uncertain > unassessed )
Actinogonium multiradiatum Rattray, 1890 † (uncertain > unassessed )
Actinogonium quinarium Chase, 1885 (uncertain > unassessed )
Actinogonium septenarium Ehrenberg, 1847 † (uncertain > unassessed )
Actinogramma brookei (J.W. Bailey) Ehrenberg, 1873 accepted as Asteromphalus brookei var. brookei J.W. Bailey, 1856
Actinogramma jupiter Ehrenberg, 1873 (uncertain > unassessed )
Actinogramma saturnus Ehrenberg, 1872 (uncertain > unassessed )
Actinogramma septenaria ‘Ehrenberg' according to Chase, 1872 (uncertain > unassessed )
Actinogramma sol Ehrenberg, 1872 (uncertain > unassessed )
Actinogramma stella Ehrenberg, 1873 (uncertain > unassessed )
Actinogramma venus Ehrenberg, 1872 (uncertain > unassessed )
Actinoneis affinis (Grunow) Hollerbach & Krasavina, 1971 accepted as Achnanthidium affine (Grunow) Czarnecki, 1994 accepted as Achnanthes affinis var. affinis Grunow in Cleve & Grunow, 1880 accepted as Achnanthes affinis Grunow, 1880 accepted as Achnanthidium affine (Grunow) Czarnecki, 1994
Actinoneis affinis var. affinis (Grunow in Cleve & Grunow) Hollerbakh & Krasavina, 1971 accepted as Achnanthes affinis var. affinis Grunow in Cleve & Grunow, 1880 accepted as Achnanthes affinis Grunow, 1880 accepted as Achnanthidium affine (Grunow) Czarnecki, 1994 accepted as Achnanthes affinis var. affinis Grunow in Cleve & Grunow, 1880
Actinoneis affinis var. jamalinensis (Grunow in Cleve & Grunow) Hollerbakh & Krasavina, 1971 accepted as Achnanthes jamalinensis Grunow in Cleve & Grunow, 1880
Actinoneis baldjikii (Brightwell) Cleve, 1895 accepted as Odontidium baldjicki Brightwell, 1859
Actinoneis bottnica (Cleve) Cleve, 1895 accepted as Achnanthes clevei var. bottnica Cleve, 1891
Actinoneis clevei (Grunow) Cleve, 1895 accepted as Karayevia clevei (Grunow) Round & Bukhtiyarova, 1999
Actinoneis clevei var. clevei (Grunow in Cleve & Grunow) Cleve, 1895 accepted as Achnanthes clevei var. clevei Grunow, 1880
Actinoneis clevei var. rostrata Mayer, 1931 (uncertain > unassessed )
Actinoneis danica (uncertain > unassessed )
Actinoneis danica var. danica (Flogel) Cleve, 1895 accepted as Cocconeis danica Flogel, 1873
Actinoneis danica var. major Cleve, 1895 (uncertain > unassessed )
Actinoneis dispar (Cleve) Cleve, 1895 accepted as Achnanthes dispar var. dispar Cleve, 1891
Actinoneis heteromorpha (Grunow) Cleve, 1895 accepted as Achnanthes heteromorpha var. heteromorpha Grunow in Cleve & Grunow, 1880
Actinoneis inopinata (Cleve) Cleve, 1895 accepted as Achnanthes inopinata var. inopinata Cleve, 1893
Actinoneis lorenziana (Grunow) Mereschkowsky, 1902 accepted as Rhaphoneis lorenziana var. lorenziana Grunow, 1862
Actinoneis lorenziana var. parva Mereschkowsky, 1902 (uncertain > unassessed )
Actinoneis mammalis (uncertain > unassessed )
Actinoneis mammalis var. mammalis (Castracane) Cleve, 1895 accepted as Rhaphoneis mammalis Castracane, 1886
Actinoneis mammalis var. reticulata Cleve, 1895 (uncertain > unassessed )
Actinoneis taeniata (Grunow in Cleve & Grunow) Hollerbakh & Krasavina, 1971 accepted as Achnanthes taeniata var. taeniata Grunow in Cleve & Grunow, 1880
Actinophaenia splendens Shadbolt, 1854 (uncertain > unassessed )
Actinostephanos matrensis (Pantocsek) Khursevich, 1990 accepted as Stephanodiscus matrensis Pantocsek, 1889
Actinostephanos rudis G.K. Khursevich & I.B. Tsoj, 1992 (uncertain > unassessed )
Aggericorona ponderosa S.Komura, 2006 † (uncertain > unassessed )
Alloioneis amphora Brun, 1891 (uncertain > unassessed )
Alloioneis antillarum Cleve & Grunow in Cleve, 1878 (uncertain > unassessed )
Alloioneis antillarum f. minor Leuduger-Fortmorel, 1898 (uncertain > unassessed )