平面藻屬（學名：_Planothidium_）為曲絲藻科的一個屬。



下屬物種

本屬包括以下物種：


* _Planothidium abbreviatum_ (Reimer) Potapova, 2012

* 非洲平面藻 _Planothidium africanum_ ，見於坦尚尼亞

* _Planothidium amphibium_ C.E.Wetzel, L.Ector & L.Pfister, 2014

* _Planothidium apiculatum_ (R.M.Patrick) Lange-Bertalot, 1999

* _Planothidium aueri_ (Krasske) H.Lange-Bertalot, 1999

* _Planothidium australe_ (Manguin) Le Cohu, 2005

* _Planothidium australodelicatulum_ Van de Vijver, C.E.Wetzel & Ector, 2018

* _Planothidium bagualensis_ C.E.Wetzel & L.Ector, 2014

* _Planothidium bahlsii_ (Potapova) Kulikovskiy, Glushchenko & Kociolek

* _Planothidium baicalacutum_ Kulikovskiy & Lange-Bertalot, 2015

* _Planothidium baicalense_ (Skvortzow & K.I.Meyer) M.B.Edlund, 2001

* _Planothidium baicalopumilum_ Kulikovskiy & Lange-Bertalot, 2015

* _Planothidium baicalorhombicum_ Kulikovskiy & Lange-Bertalot, 2015

* _Planothidium bilensis_ Bukhtiyarova, 2017

* _Planothidium biporomum_ (M.H.Hohn & Hellerman) Lange-Bertalot, 1999

* _Planothidium boneolanceolatum_ (Lange-Bertalot) H.Lange-Bertalot, 1999

* _Planothidium boudoui_ (Metzeltin & Lange-Bertalot) Coste, 2010

* _Planothidium brasiliense_ C.E.Wetzel & S.Blanco, 2019

* _Planothidium calcar_ (Cleve) Round & Bukhtiyarova, 1996

* _Planothidium capitatum_ (O.Müller) Van de Vijver, Kopalová, C.E.Wetzel & Ector, 2014

* _Planothidium caputium_ J.Zimmermann & R.Jahn, 2014

* _Planothidium cavilanceolatum_ C.E.Wetzel, M.G.Kelly & Van de Vijver, 2019

* _Planothidium comperei_ C.E.Wetzel, K.R.N'Guessan & J.Tison-Rosebery, 2014

* _Planothidium cryptolanceolatum_ R.Jahn & N.Abarca, 2017

* _Planothidium curtistriatum_ C.E.Wetzel & Ector, 2019

* _Planothidium decipiens_ Kulikovskiy & Lange-Bertalot, 2015

* _Planothidium densistriatum_ B.Van de Vijver & L.Beyens, 2002

* _Planothidium didymum_ (Hust.) Round & Bukht.

* _Planothidium dubium_ (Grunow) Round & Bukhtiyarova, 1996

* _Planothidium ellipticum_ (Cleve) Edlund

* _Planothidium ellipticum_ (Cleve) Eklund

* _Planothidium ellipticum_ (Cleve) Round & Bukhtiyarova, 1996

* _Planothidium frequentissimum_ (Lange-Bertalot) Lange-Bertalot, 1999

* _Planothidium galaicum_ Alvarez-Blanco & S.Blanco, 2013

* _Planothidium gallicum_ C.E.Wetzel & Ector, 2019

* _Planothidium hauckianum_ (Grunow) Round & Bukhtiyarova, 1996

* _Planothidium haukianum_ (Grunow) Round & Bukhtiyarova, 1996

* _Planothidium haynaldii_ (Schaarschmidt) Lange-Bertalot, 1999

* _Planothidium hinzianum_ C.E.Wetzel, Van de Vijver & Ector, 2019

* _Planothidium iberense_ L.Rovira & A.Witkowski, 2011

* _Planothidium incuriatum_ C.E.Wetzel, B.Van de Vijver & L.Ector, 2013

* _Planothidium infrequens_ H.Lange-Bertalot & Rumrich, 2000

* _Planothidium intermediumbaicale_ Kulikovskiy & Lange-Bertalot, 2015

* _Planothidium juandenovense_ Riaux-Gobin & Witkowski, 2018

* _Planothidium kaetherobertianum_ Van de Vijver & Bosak, 2019

* _Planothidium lacustre_

* _Planothidium lagerheimii_ (Cleve) C.E.Wetzel & L.Ector, 2014

* _Planothidium lanceolatum_ (Brébisson ex Kützing) Bukhtiyarova, 1999

* _Planothidium lanceolatum-type_

* _Planothidium lilianeanum_ Van de Vijver, 2018

* _Planothidium lilljeborgei_ (Grunow) Wittr.Lange-Bert. & Metzeltin, 2000

* _Planothidium longicapitatum_ Kulikovskiy & Lange-Bertalot, 2015

* _Planothidium looseri_ (Frenguelli) Rivero & Cruces, 2009

* _Planothidium makarevichae_ Kulikovskiy & Lange-Bertalot, 2015

* _Planothidium marganaiensis_ G.G.Lai, Ector & C.E.Wetzel, 2021

* _Planothidium marginostriatum_ B.Van de Vijver & L.Beyens, 2002

* _Planothidium mathurinense_ C.Riaux-Gobin & A.Y.Al-Andal, 2012

* _Planothidium minutissimum_ (Krasske) Lange-Bertalot, 1999

* _Planothidium nanum_ Bąk, Kryk & Halabowski, 2020

* _Planothidium naradoense_ R.Jahn & J.Zimmermann, 2017

* _Planothidium neglectum_ H.Lange-Bertalot & Rumrich, 2000

* _Planothidium oestrupii_ (A.Cleve) Round & L.Bukhtiyarova, 1996

* _Planothidium peragallii_ (Brun & Héribaud) Round & Bukhtiyarova, 1996

* _Planothidium peragalloi_ (J.Brun & Héribaud-Joseph) Round & L.Bukhtiyarova, 1996

* _Planothidium perigallii_ (Brun & Hérib.) Round & Bukhtiyarova

* _Planothidium piaficum_ (J.R.Carter & Denny) C.E.Wetzel & L.Ector, 2014

* _Planothidium potapovae_ C.E.Wetzel & Ector, 2019

* _Planothidium pulcherrimum_ (Hustedt) Coste, 2010

* _Planothidium pumilum_ Bąk & Lange-Bertalot, 2014

* _Planothidium reichardtii_ H.Lange-Bertalot & M.Werum, 2004

* _Planothidium renei_ (Lange-Bertalot & Schmidt) Van de Vijver, 2002

* _Planothidium rhombiculum_ Lange-Bertalot, Bąk & G.Hofmann, 2014

* _Planothidium rhombicuneatum_ H.Lange-Bertalot & Rumrich, 2000

* _Planothidium robustius_ Lange-Bertalot, 1999

* _Planothidium robustum_ (Hustedt) Lange-Bertalot, 1999

* _Planothidium rodriguense_ C.Riaux-Gobin & P.Compère, 2012

* _Planothidium rostratoholarcticum_ Lange-Bertalot & Bąk, 2014

* _Planothidium rostratum_ (Østrup) Lange-Bertalot, 1999

* _Planothidium rostrolanceolatum_ B.van de Vijver, K.Kopalová & R.Zidarova, 2013

* _Planothidium salvadorianum_ (Hustedt) Lange-Bertalot, 1999

* _Planothidium sheathii_ Stancheva, 2019

* _Planothidium slupskii_ D.Metzeltin & H.Lange-Bertalot, 2002

* _Planothidium sopotense_ H.Lange-Bertalot & M.Dziengo, 2004

* _Planothidium straubianum_ C.E.Wetzel, Van de Vijver & Ector, 2019

* _Planothidium subantarcticum_ Van de Vijver & C.E.Wetzel, 2013

* _Planothidium subatomoides_ (Hust.) Round & Bukht.

* _Planothidium taeansa_ R.Jahn & N.Abarca, 2017

* _Planothidium tenerum_ (Hustedt) Compère & Riaux-Gobin, 2012

* _Planothidium tujii_ C.E.Wetzel & Ector, 2019

* _Planothidium vanheurckii_ (Grunow) E.W.Thomas, Van de Vijver & Kociolek, 2018

* _Planothidium victori_ P.M.Novis, J.Braidwood & C.Kilroy, 2012

* _Planothidium werumianum_ Lange-Bertalot & Bąk, 2014

* _Planothidium wetzelectorianum_ Kopalova, Zidarova & Van de Vijver, 2016

* _Planothidium xinguense_ K.S.Morais, C.E.Wezel & C.E.M.Bicudo, 2020

歸入本屬的物種：


* _Achnantheiopsis lanceolatoides_ (Sovereign) Lange-Bert., 1997



參考文獻