【曲丝藻属】
曲丝藻属（学名：Achnanthidium ）为曲丝藻科的一个属。
==下级分类==
本属包括以下物种：
* Achnanthidium acerosum Van de Vijver, Lange-Bert. & Jarlman, 2011
* Achnanthidium acsiae Wojtal, E.Morales, Van de Vijver & Ector, 2011
* Achnanthidium affine (Grunow) Czarnecki, 1994
* Achnanthidium agardhii (Kützing) Mereschkowsky
* Achnanthidium agglutinans
* Achnanthidium agglutinata
* Achnanthidium alpestre (R.Lowe & J.P.Kociolek) R.Lowe & J.P.Kociolek, 2004
* Achnanthidium alteragracillimum Round & Bukhtiyarova, 1996
* Achnanthidium anastasiae (Kaczmarska) Chaudev & Gololobova
* Achnanthidium arcticum Cleve, 1873
* Achnanthidium arcus (Hust.) Lange-Bert., 1999
* Achnanthidium atomoides O.Monnier, Lange-Bert. & L.Ector, 2004
* Achnanthidium atomus (Hust.) Monnier, Lange-Bert. & Ector, 2004
* Achnanthidium australexiguum Van de Vijver, 2014
* Achnanthidium baccata Mills, 1933
* Achnanthidium barbei R.Le Cohu & F.Peres, 2014
* Achnanthidium biasolettianum (Grunow) Lange-Bert.
* Achnanthidium boreale Poretszky, 1927
* Achnanthidium cadimae E.A.Morales, E.Fernández & L.Ector, 2011
* Achnanthidium caledonicum (Lange-Bertalot) Lange-Bertalot, 1999
* Achnanthidium caravelense M.E.Novais & L.Ector, 2011
* 链状弯壳藻 Achnanthidium catenatum
* Achnanthidium cavitatum M.Miao & B.-H.Kim, 2020
* Achnanthidium chitrakootense A.Z.Wojtal, H.Lange-Bertalot & P.Nautiyal, 2010
* Achnanthidium cocconeiforme Mereschkowsky, 1902
* Achnanthidium contractum Schumann, 1867
* Achnanthidium costatum Plutenko, 1873
* Achnanthidium costei R.Le Cohu & F.Peres, 2014
* Achnanthidium crenulatum Mills, 1933
* Achnanthidium cryptocephalum Mills, 1933
* Achnanthidium cryptocephalum Naegeli ex Kützing, 1849
* Achnanthidium cubanense D.Metzeltin & Lange-Bertalot, 2007
* Achnanthidium cuneata Mills, 1933
* Achnanthidium danicum Flogel, 1895
* Achnanthidium delicatulum
* Achnanthidium delmontii F.Pérès, R.le Cohu & A.Barthès, 2012
* Achnanthidium digitatum Pinseel, Vanormelingen, Hamilton & Van de Vijver, 2017
* Achnanthidium dolomiticum M.Cantonati & Lange-Bertalot, 2006
* Achnanthidium druartii Rimet & Couté, 2010
* Achnanthidium duthii (Screen.) M.B.Edlund
* Achnanthidium elineatum Lagerstedt
* Achnanthidium ennediense (Compère) Compère & Van de Vijver, 2011
* Achnanthidium epilithica
* Achnanthidium ertzii Van de Vijver & Lange-Bert., 2011
* Achnanthidium exigua
* Achnanthidium flexuistriatum Riaux-Gobin, Compère & Witkowski, 2010
* Achnanthidium glyphos Riaux-Gobin, Compère & Witkowski, 2010
* Achnanthidium groenlandicum Cleve, 1873
* Achnanthidium guizhouensis Q.P.Yu
* Achnanthidium helveticum (Hust.) Monnier, Lange-Bert. & Ector
* Achnanthidium hoffmannii Van de Vijver, Ector, Mertens & Jarlman, 2011
* Achnanthidium hungaricum Grunow, 1863
* Achnanthidium indistinctum Van de Vijver & Kopalova, 2014
* Achnanthidium intermedium
* Achnanthidium jackii Rabenhorst, 1861
* Achnanthidium jiuzhaienis
* Achnanthidium kuwaitensis VanLandingham, 1967
* Achnanthidium lacustre Q.P.Yu
* Achnanthidium lailae Van de Vijver, 2009
* Achnanthidium lanceolatum Bréb.
* Achnanthidium latecephalum H.Kobayasi, 1997
* Achnanthidium limosua
* Achnanthidium lineare W.Smith, 1855
* Achnanthidium linearioide H.Lange-Bertalot, 2004
* Achnanthidium longipes Kisselev, 1931
* Achnanthidium longissimum P.Yu, Q-M.You & Kociolek, 2019
* Achnanthidium lyra Schumann, 1867
* Achnanthidium mangelsdorffii D.Metzeltin & H.Lange-Bertalot, 2007
* Achnanthidium margaritarum Cleve, 1893
* Achnanthidium maritimo-antarcticum Van de Vijver & Kopalova, 2014
* Achnanthidium maximum Cleve-Euler, 1895
* Achnanthidium mediolanceolatum Q.P.Yu
* Achnanthidium microcephalum Kützing, 1844
* Achnanthidium microcephalum Mereschkowsky, 1901
* Achnanthidium minutum Cleve, 1891
* Achnanthidium modestiforme (Lange-Bert.) Van de Vijver, 2002
* Achnanthidium naviculoides Reinsch, 1866
* Achnanthidium neglectum Schumann, 1867
* Achnanthidium neomicrocephalum Lange-Bertalot & F.Staab, 2004
* Achnanthidium neotropicum Krahn & C.E.Wetzel, 2018
* Achnanthidium obliquum Mereschkowsky, 1902
* Achnanthidium obtusum Schumann, 1867
* Achnanthidium otrantinum Rabenhorst, 1853
* Achnanthidium ovale M.Miao & B.-H.Kim, 2020
* Achnanthidium ovatum To.Watan. & Tuji, 2008
* Achnanthidium palmeti G.Gassiole, R.le Cohu & M.Coste, 2013
* Achnanthidium parallelum J.R.Carter
* Achnanthidium parvulum Q
* Achnanthidium peetersianum C.E.Wetzel, I.Juttner & L.Ector, 2019
* Achnanthidium peragalloi Brun & Héribaud, 1893
* Achnanthidium peragalloi Tempère, 1914
* Achnanthidium perpusilla
* Achnanthidium peruvianum E.Morales & L.Ector, 2011
* Achnanthidium petersenii (Hustedt) C.E.Wetzel, Ector & D.M.Williams
* Achnanthidium pfisteri H.Lange-Bertalot, 2004
* Achnanthidium polonicum B.Van de Vijver, A.Wojtal, E.Morales & L.Ector, 2011
* Achnanthidium pseudochamaepinnularia Riaux-Gobin, Compère & Witkowski, 2010
* Achnanthidium pseudoconspicuum (Foged) Jüttner & E.J.Cox, 2011
* Achnanthidium pseudodelicatissimum Riaux-Gobin, Witkowski & Compère, 2010
* Achnanthidium pseudolineare Van de Vijver, Novais & Ector, 2011
* Achnanthidium pulchellum
* Achnanthidium rivulare Potapova & Ponader, 2004
* Achnanthidium rostrata
* Achnanthidium rostropyrenaicum I.Jüttner & E.J.Cox, 2011
* Achnanthidium scalariforme Riaux-Gobin, Compère & Witkowski, 2010
* Achnanthidium sehuencoensis E.Morales, 2009
* Achnanthidium semiaperta (Guermeur) Andresen Stoermer & Kreis
* Achnanthidium sibiricum M.Kulikovskiy, H.Lange-Bertalot, A.Witkowski & G.Khursevich, 2011
* Achnanthidium sieminskae A.Witkowski, M.Kulikovskiy & C.Riaux-Gobin, 2012
* Achnanthidium sinense Bing Liu & S.Blanco, 2016
* Achnanthidium strictum E.Reichardt, 2004
* Achnanthidium subhungaricum Gutwinski, 1890
* Achnanthidium sublanceolatum Q.P.Yu
* Achnanthidium sublineare Van de Vijver, Jarlman & Ector, 2011
* Achnanthidium subsessile (Kützing) Heiberg
* Achnanthidium subtilissimum
* Achnanthidium taipingensis Q.P.Yu
* Achnanthidium temniskovae P.Ivanov & L.Ector, 2006
* Achnanthidium tepidaricola Van de Vijver & M.De Haan, 2011
* Achnanthidium tetrasterias Krishtofovich, 1941
* Achnanthidium tinea Tseplik, Kulikovskiy, Kociolek & Maltsev, 2021
* Achnanthidium trinode Ralfs, 1861
* Achnanthidium tropicocatenatum G.C.Marquardt, C.E.Wetzel & Ector
* Achnanthidium undulatum Schumann, 1867
* Achnanthidium ventrale
* Achnanthidium zelleri Kirchner, 1888
* Achnanthidium zhakovschikovii M.Potapova, 2006
==参考文献==