life
see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Arthropoda Siebold, 1848 - arthropods
Class Arachnida Lamarck, 1801
Micrura Hansen & Sørensen, 1904
Acaromorpha Dubinin, 1957
Order Ricinulei Thorell, 1876 - ricinuleids
1 Suborder †Palaeoricinulei Selden, 1992
2 Suborder Neoricinulei Selden, 1992