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 Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980) Class Clostridia Rainey 2010 Order Clostridialesᵀ Prévot 1953 (Approved Lists 1980) [Family "Peptostreptococcaceae"] see Family Peptostreptococcaceae Ezaki 2010 [Genus Micromonas Murdoch and Shah 2000 nom. illeg.] see Genus Parvimonas Tindall and Euzéby 2006 [Micromonas microsᵀ (Prévot 1933) Murdoch and Shah 2000 comb. illeg.] see Parvimonas micra (Prévot 1933) Tindall and Euzéby 2006