Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Bacteria Woese et al. 2024 Kingdom Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024 Phylum Bacillotaᵀ Gibbons and Murray 2021 Class Clostridia Rainey 2010 [Order Clostridialesᵀ Prévot 1953 (Approved Lists 1980)] see Order Eubacteriales Buchanan 1917 (Approved Lists 1980) [Family Proteinivoraceae (sic) Kevbrin et al. 2014 [monotypic]] see Family Proteinivoracaceae corrig. Kevbrin et al. 2014 16 [Family "Catabacteriaceae" (sic) Lau et al. 2007 nom. inval. [monotypic]] see Family Catabacteraceae corrig. Lau et al. 2007 nom. inval. 19.2.0 [Family "Gracilibacteraceae" nom. inval. [monotypic]] see Family Gracilibacteraceae Lee et al. 2010 21.1.0 [Family "Lachnospiraceae" "Garrity and Holt 2001" nom. nud.] see Family Lachnospiraceae Rainey 2010 21.2 [Family Ruminococcaceae Rainey 2010] see Family Oscillospiraceae Peshkoff 1940 (Approved Lists 1980) 21.2.0 [Family "Ruminococcaceae"] see Family Ruminococcaceae Rainey 2010 22.1.0 [Family "Peptostreptococcaceae" "Garrity and Holt 2001" nom. nud.] see Family Peptostreptococcaceae Ezaki 2010 23.0 [Family "Eubacteriaceae" "Garrity and Holt 2001" nom. nud.] see Family Eubacteriaceae Ludwig et al. 2010 25.0 [Family "Heliobacteriaceae" "Garrity and Holt 2001" nom. nud.] see Family Heliobacteriaceae Madigan and Asao 2010 x1 [Family "Acidaminococcaceae" "Garrity and Holt 2001" nom. nud.] see Family Acidaminococcaceae Marchandin et al. 2010