Freshwater Algae of North America
   Class Zygnematophyceae C.Hoek, D.G.Mann & H.M. Jahns (1995), nom. inval. - conjugating green algae see Class Zygnematophyceae Round ex Guiry (2013)
     Order Desmidiales - placoderm desmids
       Family Closteriaceae A. Pritch. (1872)
         Genus Spinoclosterium C.Bernard (1909) [monotypic]
           1 Spinoclosterium cuspidatum (Bailey) Hirano