Williamsiaceae Garrity and Holt 2001 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Actinobacteria (sic) Goodfellow 2021 non Actinobacteria Stackebrandt et al. 1997 Actinomycetota corrig. Goodfellow 2021 Actinobacteriota corrig. Goodfellow 2021 Actinomycetes Krasil'nikov 1949 (Approved Lists 1980) Actinomycetales Buchanan 1917 (Approved Lists 1980) emend. Salam et al. 2020 Corynebacterineae Stackebrandt et al. 1997 emend. Zhi et al. 2009 Williamsiaceae Garrity and Holt 2001 Corynebacterineae Stackebrandt et al. 1997 emend. Zhi et al. 2009 Gordoniaceae Rainey et al. 1997 emend. Nouioui et al. 2018 Incertae sedis 16 None 2015 Incertae sedis 65 None 2015 Corynebacteriaceae Lehmann and Neumann 1907 (Approved Lists 1980) emend. Nouioui et al. 2018 Dietziaceae Rainey et al. 1997 emend. Zhi et al. 2009 Mycobacteriaceae Chester 1897 (Approved Lists 1980) emend. Gupta et al. 2018 Nocardiaceae Castellani and Chalmers 1919 (Approved Lists 1980) emend. Nouioui et al. 2018 Tsukamurellaceae Rainey et al. 1997 emend. Zhi et al. 2009 Incertae sedis 40 Bell et al. 2016 Segniliparaceae Butler et al. 2005 emend. Zhi et al. 2009 Williamsia Kämpfer et al. 1999 Garrity G.M. Holt J.G. Garrity G.M. Boone D.R. Castenholz R.W. Taxonomic Outline of the Archaea and Bacteria. 2001 1 2 155 166 Bergey's Manual of Systematic Bacteriology Springer New York