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
Megoperculata Börner, 1902
1 Order Palpigradi Thorell, 1888 - palpigrades
2 Tetrapulmonata Shultz, 1990