Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Bryobiotina Campb. (1890) Division Anthocerotophyta Stotler & Crand.-Stotl. (1977) see Phylum Anthocerotophyta Stotler & Crand.-Stotl. (1977) Class Anthocerotopsida Jancz. (1872) - hornworts Subclass Notothylatidae Duff, J.C. Villarreal, Cargill & Renzaglia [monotypic] Order Notothyladales Hyvönen & Piippo [monotypic] Family Notothyladaceae Müll.Frib. ex Prosk. (1960) Subfamily Phaeocerotoideae Hässel Genus Phaeoceros Prosk. (1951)