organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Kingdom Protoctista Hogg, 1860 Phylum Xanthophyta Allorge, in Fritsch (1935) see Class Xanthophyceae P. Allorge ex Fritsch (1935) Class Heterococcales see Order Mischococcales Genus Ophiocytium Nägeli (1849), nom. cons. Ophiocytium majus Nägeli see Ophiocytium maius Nägeli