[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 "Lactobacillales" Garrity and Holt 2001 nom. nud. see Order Lactobacillales Ludwig et al. 2010
           Family Lactobacillaceae Winslow et al. 1917 (Approved Lists 1980)
             Genus Lactobacillus Beijerinck 1901 (Approved Lists 1980)
               [Lactobacillus casei] (Orla-Jensen 1916) Hansen and Lessel 1971 (Approved Lists 1980)
                 Lactobacillus casei subsp. caseiᵀ (Orla-Jensen 1916) Abo-Elnaga and Kandler 1965 (Approved Lists 1980) see Lactobacillus casei (Orla-Jensen 1916) Hansen and Lessel 1971 (Approved Lists 1980)