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 Halvaria Cavalier-Smith, 2010
Superphylum Alveolata Cavalier-Smith, 1991
Phylum Miozoa Cavalier-Smith, 1987
Subphylum Myzozoa Cavalier-Smith & Chao, 2004
Infraphylum Apicomplexa Levine, 1970
Superclass Sporozoa Leuckart, 1879
Class Gregarinomorphea Grassé, 1953
Subclass Orthogregarinia Cavalier-Smith, 2014
Order Arthrogregarida Cavalier-Smith, 2014
Suborder Terragregarina Cavalier-Smith, 2014
Superfamily Gregarinoidea Labbé, 1899
Family Hirmocystidae Grassé, 1953
Genus Retractocephalus Haldar & Chakraborty, 1976
Retractocephalus raphidopalpaeᵀ Haldar & Chakraborty, 1976