Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Pteridophytanae Doweld (2001) [monotypic] see Superphylum Pteridophytanae Doweld (2001)
       Division Monilophyta Cantino & Donoghue
         Class Equisetopsida C.Agardh (1825) - horsetails see Subclass Equisetidae Warm. (1883)
           Order Equisetales DC. ex Bercht. & J.Presl (1829)
             Family †Tchernoviaceae S.V.Meyen (1983)
               1 Genus †Tschernovia Neuburg (1948), orth. inval. see Genus Tchernovia Zalessky (1930)
               2 Genus †Equisetinostachys Rassk. (1961)