Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Bryobiotina Campb. (1890)
     Division Marchantiophyta Stotler & Crand.-Stotl. (2000) see Phylum Marchantiophyta Stotler & Crand.-Stotl. (2000)
       Class Haplomitriopsida Stotler & Crand.-Stotl. (1977)
         Subclass Treubiidae Stotler & Crand.-Stotl. [monotypic]
           Order Treubiales Schljakov (1972) [monotypic]
             Family Treubiaceae Verd.
               Genus Treubia K.I.Goebel (1890)