[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Gammaproteobacteria Garrity et al. 2005
         Order "Enterobacteriales" Garrity and Holt 2001 nom. nud.
           Family Enterobacteriaceae Rahn 1937 (Approved Lists 1980)
             Genus Xenorhabdus Thomas and Poinar 1979 (Approved Lists 1980)
               [Xenorhabdus nematophila] corrig. (Poinar and Thomas 1965) Thomas and Poinar 1979 (Approved Lists 1980)
                 Xenorhabdus nematophila subsp. nematophilaᵀ corrig. (Poinar and Thomas 1965) Akhurst 1983 see Xenorhabdus nematophila corrig. (Poinar and Thomas 1965) Thomas and Poinar 1979 (Approved Lists 1980)