[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 Streptococcaceae Deibel and Seeley 1974 (Approved Lists 1980)
             Genus Lactococcus Schleifer et al. 1986
               [Lactococcus lactis] (Lister 1873) Schleifer et al. 1986
                 Lactococcus lactis subsp. cremoris (Orla-Jensen 1919) Schleifer et al. 1986