Alcaligenes denitrificans xylosoxydans Kersters and De Ley 1984 Alcaligenes denitrificans xylosoxydans Kersters and De Ley 1984 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Proteobacteria (sic) Garrity et al. 2021 Pseudomonadota corrig. Garrity et al. 2021 Alphaproteobacteriota (sic) Garrity et al. 2021 Betaproteobacteria Garrity et al. 2006 emend. Boden et al. 2017 Burkholderiales Garrity et al. 2006 Alcaligenaceae De Ley et al. 1986 Alcaligenes Castellani and Chalmers 1919 (Approved Lists 1980) Alcaligenes denitrificans (ex Leifson and Hugh 1954) Rüger and Tan 1983 Alcaligenes denitrificans xylosoxydans Kersters and De Ley 1984 Alcaligenes denitrificans (ex Leifson and Hugh 1954) Rüger and Tan 1983 Alcaligenes denitrificans denitrificans Rüger and Tan 1983 Alcaligenes xylosoxidans (Yabuuchi and Yano 1981) Kiredjian et al. 1986 Alcaligenes xylosoxidans xylosoxidans (Yabuuchi and Yano 1981) Kiredjian et al. 1986 Achromobacter xylosoxidans xylosoxidans Yabuuchi and Yano 1981 Alcaligenes denitrificans xylosoxydans Kersters and De Ley 1984 Achromobacter xylosoxidans (ex Yabuuchi and Ohyama 1971) Yabuuchi and Yano 1981 emend. Yabuuchi et al. 1998 Kiredjian M. Holmes B. Kersters K. Guilvout I. De Ley J. Alcaligenes piechaudii, a new species of the human clinical specimens and the environment. 1986 36 2 282 287 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-36-2-282 Kersters K. De Ley J. Holt J.G. Genus Alcaligenes Castellani and Chalmers 1919, 936 AL 1984 1 1 361 376 Bergey's Manual of Systematic Bacteriology The Williams and Wilkins Co. Baltimore Alcaligenes xylosoxidans denitrificans (Rüger and Tan 1983) Kiredjian et al. 1986 List Editor Validation List no. 15. Validation of the publication of new names and new combinations previously effectively published outside the IJSB 1984 34 3 355 357 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-34-3-355 Kersters K. De Ley J. Holt J.G. Genus Alcaligenes Castellani and Chalmers 1919, 936 AL 1984 1 1 361 376 Bergey's Manual of Systematic Bacteriology The Williams and Wilkins Co. Baltimore Kiredjian M. Holmes B. Kersters K. Guilvout I. De Ley J. Alcaligenes piechaudii, a new species of the human clinical specimens and the environment. 1986 36 2 282 287 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-36-2-282 Although this name appeared on Validation List 15, it is illegitimate because it was a new combination that did not preserve the appropriate epithet or type.