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 Retaria Cavalier-Smith, 2002
Subphylum Radiozoa Cavalier-Smith, 1987
Superclass Polycystinia Ehrenberg, 1838
Class Nassellaria Ehrenberg, 1847
Order Cyrtidinata Haeckel, 1862
Superfamily Eucyrtidioidea Ehrenberg, 1847
Family †Xitidae Pessagno, 1977
1 Genus †Clavaxitus Dumitrica, 1997
2 Genus †Crolanium Pessagno, 1977
3 Genus †Foremanina Empson-Morin, 1981
4 Genus †Neorelumbra Kiessling, 1995
5 Genus †Novixitus Pessagno, 1977
6 Genus †Praexitus Dumitrica, 1997
7 Genus †Pseudoxitus Wu & Pessagno, 1993
8 Genus †Tugurium O'Dogherty, 1994, nom. illeg.
9 Genus †Xitusᵀ Pessagno, 1977