Kingdom [Plantae] Haeckel (1866) - plants
   Division Pteridophyta Schimp. (1879) see Subphylum Pteridophytina (Eichler) Cavalier-Sm. (1998)
     Class †Progymnospermopsida Beck (1960) see Clade Pan-Spermatophyta Cantino & Donoghue 2007 [Cantino, Doyle & Donoghue 2020]
       Order †Aneurophytales Beck (1957)
         1 Family †Aneurophytaceae Ananiev (1963), nom. cons. prop.
         2 Family †Protokalonaceae C.J.Cleal & B.A.Thomas (1995), orth. inval. see Family Proteokalonaceae P.D.W.Barnard & A.G. Long (1975)
         3 Family †Protopityaceae Solms ex D.H.Scott (1900)