organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     flagellated protists
       Class Prasinophyceae T. Christensen, 1962 ex Ø. Moestrup & J. Throndsen (1988) - prasinophytes see [unranked] prasinophytes
         Order Pyramimonadales Chadefaud
           Family Halosphaeraceae Haeckel (1894)
             1 Genus Cymbomonas J. Schiller (1913)
             2 Genus Halosphaera K.J.F.Schmitz (1879)
             3 Genus Pachysphaera C.E.H. Ostenfeld (1899)
             4 Genus Pterosperma Pouchet (1893)
             5 Genus Pyramimonas Schmarda (1850)
             6 ?Genus Prasinochloris J.H. Belcher (1966)