[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Bacilli" Garrity et al. 2001 nom. ined. see Class Bacilli Ludwig et al. 2010
         Order Bacillales Prévot 1953 (Approved Lists 1980)
           Family "Listeriaceae" Garrity and Holt 2001 nom. nud. see Family Listeriaceae Ludwig et al. 2010
             Genus Listeria Pirie 1940 (Approved Lists 1980)
               [Listeria ivanovii] Seeliger et al. 1984
                 Listeria ivanovii subsp. ivanoviiᵀ (Seeliger et al. 1984) Boerlin et al. 1992