Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Chromista Caval.-Sm. (1981) - chromists
                           Subkingdom Harosa Cavalier-Smith, 2010
                             [crown] Clade Sar Adl et al. 2012 [Simpson & Dunthorn 2020]
                               Infrakingdom Rhizaria Cavalier-Smith, 2002
                                 Phylum Cercozoa Cavalier-Smith, 1998
                                   Subphylum Monadofilosaᵀ Cavalier-Smith, 1997
                                     Class Thecofilosea T. Cavalier-Smith & E.E.-Y. Chao, 2003
                                       Subclass Eothecia
                                         Order Cryomonadida Cavalier-Smith, 1993
                                           Family Protaspidae Cavalier-Smith, 1993
                                             [Genus Protaspisᵀ Skuja, 1939, nom. illeg.] see Genus Protaspa A.T. Howe et al., 2011
                                               Protaspis gemmiferum Larsen & Patterson, 1990
                                               Protaspis glansᵀ Skuja, 1939
                                               Protaspis maior Skuja, 1939
                                               Protaspis metarhiza Skuja, 1939
                                               Protaspis obliqua Larsen & Patterson, 1990
                                               Protaspis obovata Skuja, 1948
                                               Protaspis simplex N. Vørs, 1992
                                               Protaspis tegere Larsen & Patterson, 1990
                                               Protaspis verrucosa J. Larsen & D.J. Patterson, 1990