DiatomBase
Between brackets is the number of accepted extant species
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- Bacillariophyceae (5 957)
- Subclass Bacillariophyceae incertae sedis (189)
- Subclass Bacillariophycidae (4 408)
- Superorder Bacillariophycanae (4 083)
- Order Achnanthales (438)
- Family Achnanthaceae Kützing, 1844 (111)
- Family Achnanthidiaceae D.G. Mann, 1990 (244)
- Genus Achnantheiopsis Lange-Bert., 1997 accepted as Planothidium F.E. Round & L. Bukhtiyarova, 1996 (1)
- Genus Achnanthidium F.T. Kützing, 1844 (57)
- Genus Crenotia Wojtal, 2013 (8)
- Genus Eucocconeis P.T. Cleve ex F. Meister, 1912 (4)
- Genus Gliwiczia M.Kulikovskiy, Lange-Bertalot & A.Witkowski, 2013 (5)
- Genus Gliwiczia Kulikovskiy, M., Lange-Bertalot, H. & Witkowski, A., 2013
- Genus Gololobovia Kulikovskiy, Glushchenko, Genkal & Kociolek in Kulikovskiy et al., 2020 (4)
- Genus Karayevia F.E. Round & L. Bukhtiyarova ex F.E. Round, 1998 (19)
- Genus Kolbesia F.E. Round & L. Bukhtiyarova ex F.E. Round, 1998 (2)
- Genus Lemnicola F.E. Round & P.W. Basson, 1997
- Genus Madinithidium C.Desrosiers, A.Witkowski & C.Riaux-Gobin, 2014 (7)
- Genus Majewskaea Van de Vijver, K.Robert, Witkowski & Bosak, 2020 (1)
- Genus Planothidium F.E. Round & L. Bukhtiyarova, 1996 (71)
- Species Planothidium abbreviatum (Reimer) Potapova, 2012
- Species Planothidium acidoclinatum (Lange-Bertalot) Lange-Bertalot, 1999 accepted as Psammothidium acidoclinatum (Lange-Bertalot) Lange-Bertalot, 1999
- Species Planothidium africanum Van de Vijver, Gogne, Hoogsteyns, Van de Velde, Vlaminck, Kabota, Teunen & C.E.Wetzel in Van de Vijver et al. 2023
- Species Planothidium amphibium C.E.Wetzel, L.Ector & L.Pfister, 2014
- Species Planothidium apiculatum (R.M.Patrick) Lange-Bertalot, 1999
- Species Planothidium apiculatum (Patrick) R.Lowe in Johansen et al., 2004 accepted as Planothidium apiculatum (R.M.Patrick) Lange-Bertalot, 1999
- Species Planothidium aueri (Krasske) H. Lange-Bertalot, 1999
- Species Planothidium australe (Manguin) Le Cohu, 2005
- Species Planothidium australodelicatulum Van de Vijver, C.E.Wetzel & Ector, 2018
- Species Planothidium bagualensis C.E.Wetzel & L.Ector, 2014
- Species Planothidium bahlsii (Potapova) Kulikovskiy, Glushchenko & Kociolek
- Species Planothidium baicalacutum Kulikovskiy & Lange-Bertalot in Kulikovskiy et al., 2015
- Species Planothidium baicalense (Skvortzow & K.I. Meyer) M.B. Edlund in M.B. Edlund, N. Soninkhishig, R.M. Williams & E.F. Stoermer, 2001
- Species Planothidium baicalopumilum Kulikovskiy & Lange-Bertalot in Kulikovskiy et al., 2015
- Species Planothidium baicalorhombicum Kulikovskiy & Lange-Bertalot in Kulikovskiy et al., 2015
- Species Planothidium bilensis Bukhtiyarova, 2017
- Species Planothidium biporomum (M.H.Hohn & Hellerman) Lange-Bertalot, 1999
- Species Planothidium boneolanceolatum (Lange-Bertalot) H. Lange-Bertalot, 1999 accepted as Achnantheiopsis borneolanceolata Lange-Bert., 1997
- Species Planothidium boudoui (Metzeltin & Lange-Bertalot) Coste, 2010
- Species Planothidium brasiliense C.E.Wetzel & S.Blanco in Wetzel et al., 2019
- Species Planothidium calcar (Cleve) Round & Bukhtiyarova, 1996
- Species Planothidium campechianum (Hustedt) Witkowski & Lange-Bertalot accepted as Achnanthes campechiana Hustedt, 1952
- Species Planothidium capitatum (O.Müller) Van de Vijver, Kopalová, C.E.Wetzel & Ector, 2014
- Species Planothidium caputium J.Zimmermann & R.Jahn, 2014
- Species Planothidium cavilanceolatum C.E.Wetzel, M.G.Kelly & Van de Vijver in Wetzel et al., 2019
- Species Planothidium chilense (Hustedt) Lange-Bertalot, 1999 † accepted as Achnanthes chilensis Hustedt, 1927 †
- Species Planothidium comperei C.E.Wetzel, K.R.N'Guessan & J.Tison-Rosebery, 2014
- Species Planothidium conspicuum (A.Mayer) M.Aboal, 2003 accepted as Achnanthes conspicua var. conspicua A.Mayer, 1919
- Species Planothidium curtissimum (J.R.Carter) Aboal accepted as Psammothidium curtissimum (J.R.Carter) M.Aboal, 2003
- Species Planothidium curtistriatum C.E.Wetzel & Ector in Wetzel et al., 2019
- Species Planothidium cyclophorum (Heiden) B. Van de Vijver in Krammer & Lange-Bertalot, 2004 accepted as Achnanthes cyclophora Heiden in Heiden & Kolbe, 1928
- Species Planothidium daui (Foged) Lange-Bertalot, 1999 accepted as Achnanthes daui Foged, 1962
- Species Planothidium decipiens Kulikovskiy & Lange-Bertalot in Kulikovskiy et al., 2015
- Species Planothidium delicatulum (Kützing) Round & Bukhtiyarova, 1996 accepted as Achnanthidium delicatulum f. delicatulum Kützing, 1844
- Species Planothidium densistriatum B. Van de Vijver & L. Beyens in Van de Vijver, Frenot & Beyens, 2002
- Species Planothidium deperditum (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Cocconeis deperdita Giffen, 1975
- Species Planothidium diplopunctatum (Simonsen) Witkowski accepted as Achnanthes diplopunctata Simonsen, 1959
- Species Planothidium dispar (Cleve) Witkowski, Lange-Bertalot & Metzeltin, 2000 accepted as Achnanthes dispar var. dispar Cleve, 1891
- Species Planothidium distinctum (Messikommer) Lange-Bertalot, 1999 accepted as Achnanthes distincta Messikommer, 1954
- Species Planothidium dubium (Grunow) Round & Bukhtiyarova, 1996
- Species Planothidium ellipticum (Cleve) Round & Bukhtiyarova, 1996
- Species Planothidium engelbrechtii (Cholnoky) Round & L.Bukhtiyarova, 1996 accepted as Achnanthes engelbrechtii var. engelbrechtii Cholnoky, 1955
- Species Planothidium fonticolanceolatum (Lange-Bertalot & Schimanski) Lange-Bertalot, 1999 accepted as Achnanthes fonticolanceolata Lange-Bertalot & Schimanski, 1989
- Species Planothidium fossile (Tempère & H.Peragallo) R.Lowe, 2004 accepted as Achnanthes peragalloi var. fossilis Tempère & H.Peragallo, 1909
- Species Planothidium fragilarioides (J.B.Petersen) Round & Bukhtiyarova, 1996 accepted as Achnanthes fragilarioides J.B.Petersen, 1924
- Species Planothidium frequentissimum (Lange-Bertalot) Lange-Bertalot, 1999
- Variety Planothidium frequentissimum var. magnum (F.Straub) Lange-Bertalot, 1999 accepted as Achnanthes rostrata var. magna F.Straub, 1985
- Variety Planothidium frequentissimum var. minus (Schulz-Danzig) Lange-Bertalot, 1999 accepted as Achnanthes lanceolata f. minor Schulz, 1926
- Species Planothidium frequentissimum (Lange-Bertalot) F.E.Round & Bukhtiyarova, 1996 accepted as Achnanthes lanceolata Lange-Bertalot, 1993
- Species Planothidium galaicum I.Ãlvarez-Blanco & S.Blanco, 2013
- Species Planothidium gallicum C.E.Wetzel & Ector in Wetzel et al., 2019
- Species Planothidium granum (M.H.Hohn & Hellerman) Lange-Bertalot, 1999 accepted as Achnanthes grana Hohn & Hellerman, 1963
- Species Planothidium hauckianum (Grunow) Round & Bukhtiyarova, 1996
- Species Planothidium haukianum (Grunow) Round & Bukhtiyarova, 1996
- Species Planothidium haynaldii (Schaarschmidt) Lange-Bertalot, 1999
- Species Planothidium heidenii (Schulz-Danzig) Witkowski accepted as Achnanthes heideni var. heideni Schulz, 1926
- Species Planothidium heteromorphum (Grunow) Lange-Bertalot, 1999 accepted as Achnanthes heteromorpha var. heteromorpha Grunow in Cleve & Grunow, 1880
- Species Planothidium hinzianum C.E.Wetzel, Van de Vijver & Ector in Wetzel et al., 2019
- Species Planothidium holstii (Cleve) Lange-Bertalot, 1999 accepted as Achnanthes holstii var. holstii Cleve, 1881
- Species Planothidium hustedtii (Krasske) Lange-Bertalot, 2004 accepted as Platessa hustedtii (Krasske) Lange-Bertalot, 2004
- Species Planothidium iberense L.Rovira & A.Witkowski, 2011
- Species Planothidium incuriatum C.E.Wetzel, B. Van de Vijver & L.Ector, 2013
- Species Planothidium infrequens H. Lange-Bertalot & Rumrich in U. Rumrich, H. Lange-Bertalot & M. Rumrich, 2000
- Species Planothidium intermediumbaicale Kulikovskiy & Lange-Bertalot in Kulikovskiy et al., 2015
- Species Planothidium jacobii (Manguin) D. Metzeltin & H. Lange-Bertalot, 2002 accepted as Achnanthes jacobii Manguin, 1949
- Species Planothidium jan-marcinii (A. Witkowski, D. Metzeltin & H. Lange-Bertalot in D. Metzeltin & A. Witkowski) A. Witkowski, H. Lange-Bertalot & D. Metzeltin, 2000 accepted as Achnanthes jan-marcinii Witkowski, Metzeltin & Lange-Bertalot, 1996
- Species Planothidium joursacense (Héribaud-Joseph) Lange-Bertalot, 1999 accepted as Achnanthes joursacense Héribaud-Joseph, 1903
- Species Planothidium juandenovense Riaux-Gobin & Witkowski, 2018
- Species Planothidium kaetherobertianum Van de Vijver & Bosak, 2019
- Species Planothidium lacustre I.Ãlvarez-Blanco, C.Cejudo-Figueiras & S.Blanco, 2013
- Species Planothidium lagerheimii (Cleve) C.E. Wetzel & L. Ector, 2014
- Species Planothidium lanceolatoide (Sovereign) H. Lange-Bertalot, 1999 accepted as Achnanthes lanceolatoides H.E.Sovereign, 1958
- Species Planothidium lanceolatum (Brébisson ex Kützing) Bukhtiyarova, 1999
- Species Planothidium lemmermannii (Hustedt) E.A.Morales, 2006 accepted as Achnanthes lemmermannii var. lemmermannii Hustedt, 1933
- Species Planothidium lilianeanum Van de Vijver in Van de Vijver et al., 2018
- Species Planothidium lilljeborgei (Grunow) Witkowski accepted as Achnanthes lilljeborgii Grunow, 1881
- Species Planothidium linkei (Hustedt) Lange-Bertalot, 1999 accepted as Achnanthes linkei var. linkei Hustedt, 1939
- Species Planothidium longicapitatum Kulikovskiy & Lange-Bertalot in Kulikovskiy et al., 2015
- Species Planothidium looseri (Frenguelli) Rivero & Cruces, 2009
- Species Planothidium magnificum (Hustedt) Lange-Bertalot, 1999 accepted as Achnanthes magnifica Hustedt, 1952
- Species Planothidium makarevichae Kulikovskiy & Lange-Bertalot in Kulikovskiy et al., 2015
- Species Planothidium marganaiensis G.G.Lai, Ector & C.E.Wetzel in Lai et al., 2021
- Species Planothidium marginostriatum B. Van de Vijver & L. Beyens in Van de Vijver, Frenot & Beyens, 2002
- Species Planothidium marinum (Hustedt) Lange-Bertalot, 1999 accepted as Achnanthes marina Hustedt, 1937
- Species Planothidium mathurinense C.Riaux-Gobin & A.Y.Al-Andal, 2012
- Species Planothidium meyeri (Skvortzow) Flower & Khursevich, 2006 † accepted as Achnanthes meyeri Skvortzow, 1937
- Species Planothidium minutissimum (Krasske) Lange-Bertalot, 1999
- Species Planothidium minutissimum (Krasske) E.A.Morales, 2006 accepted as Planothidium minutissimum (Krasske) Lange-Bertalot, 1999
- Species Planothidium miotum (Carter & Denny) Lange-Bertalot, 1999 accepted as Achnanthes miota Carter & Denny, 1982
- Species Planothidium nanum Bąk, Kryk & Halabowski, 2020
- Species Planothidium nanum Bąk, Kryk et Halabowski in Bak et al., 2020
- Species Planothidium neglectum H. Lange-Bertalot & Rumrich in U. Rumrich, H. Lange-Bertalot & M. Rumrich, 2000
- Species Planothidium oculatum (Hustedt) Witkowski accepted as Achnanthes oculata var. oculata Hustedt, 1952
- Species Planothidium oestrupii (A.Cleve) Round & L.Bukhtiyarova, 1996
- Species Planothidium peragallii (Brun & Héribaud) Round & Bukhtiyarova, 1996
- Species Planothidium peragalloi (J.Brun & Héribaud-Joseph) Round & L.Bukhtiyarova, 1996
- Species Planothidium pericavum (J.R.Carter) Lange-Bertalot, 1999 accepted as Achnanthes pericava J.R.Carter, 1966
- Species Planothidium piaficum (J.R.Carter & Denny) C.E.Wetzel & L.Ector, 2014
- Species Planothidium polaris (Østrup) Witkowski accepted as Achnanthes polaris Oestrup, 1895
- Species Planothidium potapovae C.E.Wetzel & Ector in Wetzel et al., 2019
- Species Planothidium pseudotanense (Cleve-Euler) Lange-Bertalot, 1999 accepted as Achnanthes pseudotanensis A.Cleve-Euler, 1953
- Species Planothidium pulcherrimum (Hustedt) Coste, 2010
- Species Planothidium pumilum Bąk & Lange-Bertalot, 2014
- Species Planothidium pungens (Cleve-Euler) Lange-Bertalot, 1999 accepted as Achnanthes elliptica var. pungens Cleve-Euler, 1934
- Species Planothidium quadripunctatum (Oppenheim) K. Sabbe in Sabbe et al., 2003 accepted as Achnanthes quadripunctata D.R. Oppenheim, 1995
- Species Planothidium quarnerensis (Grunow) Witkowski, Lange-Bertalot & Metzelin, 2000 accepted as Rhaphoneis quarnerensis Grunow, 1862
- Species Planothidium reichardtii H. Lange-Bertalot & M. Werum in Werum & Lange-Bertalot, 2004
- Species Planothidium renei (Lange-Bertalot & Schmidt) Van de Vijver, 2002
- Species Planothidium rhombiculum Lange-Bertalot, Bąk & G.Hofmann in Bąk & Lange-Bertalot, 2014
- Species Planothidium rhombicuneatum H. Lange-Bertalot & Rumrich in U. Rumrich, H. Lange-Bertalot & M. Rumrich, 2000
- Species Planothidium robustius Lange-Bertalot, 1999
- Species Planothidium robustum (Hustedt) Lange-Bertalot, 1999
- Species Planothidium rodriguense C.Riaux-Gobin & P.Compère, 2012
- Species Planothidium rostratoholarcticum Lange-Bertalot & Bąk in Bąk & Lange-Bertalot, 2014
- Species Planothidium rostratum (Østrup) Lange-Bertalot, 1999
- Species Planothidium rostrolanceolatum B.van de Vijver, K.Kopalová & R.Zidarova, 2013
- Species Planothidium salvadorianum (Hustedt) Lange-Bertalot, 1999
- Species Planothidium schwabei (Krasske) H. Lange-Bertalot in U. Rumrich, H. Lange-Bertalot & M. Rumrich, 2000
- Species Planothidium septentrionalis (Østrup) Round & Bukhtiyarova, 1996 accepted as Achnanthes septentrionalis var. septentrionalis Østrup, 1910
- Species Planothidium sheathii Stancheva, 2019
- Species Planothidium slupskii D. Metzeltin & H. Lange-Bertalot, 2002
- Species Planothidium sopotense H. Lange-Bertalot & M. Dziengo in K. Krammer & H. Lange-Bertalot, 2004
- Species Planothidium stauroneiformis (Skabichevskij) R.J.Flower & Khursevich, 2006 † accepted as Achnanthes stauroneiformis Skabichevskij, 1936
- Species Planothidium stewartii (Patrick) Lange-Bertalot, 2004 accepted as Achnanthes stewartii Patrick, 1945
- Species Planothidium straubianum C.E.Wetzel, Van de Vijver & Ector in Wetzel et al., 2019
- Species Planothidium subantarcticum Van de Vijver & C.E.Wetzel, 2013
- Species Planothidium sublitoralis (Skabichevskij) Khursevich, R.J.Flower & D.M.Williams, 2006 † accepted as Achnanthes sublitoralis Skabichevskii, 1976
- Species Planothidium tenerum (Hustedt) Compère & Riaux-Gobin, 2012
- Species Planothidium tujii C.E.Wetzel & Ector in Wetzel et al., 2019
- Species Planothidium vanheurckii (Grunow in Van Heurck) E.W. Thomas, Van de Vijver & Kociolek, 2018
- Species Planothidium victori P.M.Novis, J.Braidwood & C.Kilroy, 2012
- Species Planothidium werumianum Lange-Bertalot & Bąk in Bąk & Lange-Bertalot, 2014
- Species Planothidium xinguense K.S.Morais, C.E.Wezel & C.E.M.Bicudo in Morais et al., 2020
- Genus Platebaikalia Kulikovskiy, Glushchenko, Genkal et Kociolek in Kulikovskiy et al., 2020 (1)
- Genus Psammothidium L. Bukhtiyarova & F.E. Round, 1996 (35)
- Genus Pseudachnanthidium Riaux-Gobin in Riaux-Gobin & Witkowski, 2015 (1)
- Genus Rossithidium F.E. Round & L. Bukhtiyarova, 1996 (3)
- Genus Skabitschewskia Kulikovskiy & Lange-Bertalot, 2015 (24)
- Genus Xenobennettella Witkowski & Riaux-Gobin in Witkowski et al., 2022 (1)
- Family Cocconeidaceae Kützing, 1844 (83)
- Order Bacillariales (357)
- Order Cymbellales (792)
- Order Dictyoneidales
- Order Lyrellales (15)
- Order Mastogloiales (88)
- Order Naviculales (2 077)
- Order Rhopalodiales (37)
- Order Surirellales (174)
- Order Thalassiophysales (105)
- Superorder Bacillariophycidae incertae sedis (32)
- Superorder Eunotiophycanae (293)
- Subclass Coscinodiscophycidae (877)
- Subclass Fragilariophycidae (483)
- Order Centrales
