[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Algae L. (1753) see [unranked] Algae
     Phylum Chlorophycota see Phylum Chlorophyta Pascher (1914)
       Class Chlorophyceae Wille (1884) - chlorophytes
         Order Ulvales Blackman & Tansley
           Family Monostromataceae see Family Gomontiaceae De Toni
             Genus Protomonostroma K.L. Vinogradova (1969)
               Protomonostroma undulatum (Wittrock) K.L. Vinogradova (1969)