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] Domain Bacteria Woese et al. 1990 [paraphyletic?] Superphylum Terrabacteria Battistuzzi et al. 2004 Phylum Chloroflexi Garrity and Holt 2001 Class Caldilineae Yamada et al. 2006 [monotypic] Order Caldilinealesᵀ Yamada et al. 2006 [monotypic] Family Caldilineaceae Yamada et al. 2006 Genus Caldilineaᵀ Sekiguchi et al. 2003 Caldilinea tarbellica Grégoire et al. 2011