Natur - nature
   Organismen see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
     Pflanzen Haeckel (1866) - plants
       Protophyta
         Murracyteae Haeckel (1890)
           1 Genus Pyrocystis J. Murray ex Haeckel (1890) [monotypic]
           2 Genus Photocystis Haeckel (1890) [monotypic]
           3 Genus Murracystis Haeckel (1890) [monotypic] see Genus Pyrocystis J. Murray ex Haeckel (1890)
           4 Genus Nectocystis Haeckel (1890) [monotypic]